uCAM-III

Description

The uCAM-III (microCAM-III) is a highly integrated serial camera module which can be attached to any host system that requires a video camera or a JPEG-compressed still camera for embedded imaging applications.

The uCAM-III is an updated version of the uCAM-II, but is backward compatible and interchangeable, and has a few enhancements over the previous model which can be taken advantage of (refer to the Revision History section).

The module uses a CMOS VGA colour sensor along with a JPEG compression chip that provides a low cost and low-powered camera system. The module has an onboard serial interface (TTL) that is suitable for a direct connection to any host micro-controller UART or a PC system COM port.

The uCAM-III is capable of outputting both RAW format and JPEG format images.

User commands are sent using a simple serial protocol that can instruct the camera to send low-resolution (80x60 to 160x120) single frame raw images for viewing or high-resolution (160x128 to 640x480) JPEG images for storage or viewing.

The uCAM-III comes in a compact form factor with a built-in lens and a 5-wire connector that provides easy access to both power and serial data.

There are 3 lenses available for this camera from 4D Systems. A 56 degree (Standard), a 76-degree, and a 116-degree. These are available to purchase from 4D Systems separately if required. The uCAM-III ships with the 56 degree lens installed.

There is a locking nut on the barrel thread of the lens, which is used to lock the focus in place once set, to prevent it from inadvertently being changed.

Features

• Small size, low cost and low powered camera module for embedded imaging applications.
• uCAM-III: 5V DC Supply nominal
• On-board EEPROM provides a command-based interface to an external host via TTL serial link.
• On-board 128KB of RAM, an upgrade over the uCAM-II, which enables complex images with texture to be captured without automatic downsampling.
• UART: up to 3.68Mbps for transferring JPEG still pictures or raw images.
• On-board VGA colour sensor and RAW / JPEG CODEC for different resolutions.
• Built-in down sampling, clamping and windowing circuits for VGA, QVGA or 160x120 image resolutions.
• Built-in colour conversion circuits for 16-bit CrYCbY, 8-bit gray, 16-bit RGB or standard JPEG images.
• No external DRAM is required.
• Additions lenses available
• Locking nut for locking focus in place
• Weight ~ 6g.
• Dimensions: 32mm x 32mm x 21mm (without lens, including header)
• RoHS and Reach compliant

Module Dimensions

Pin Configuration

uCAM-III Pin Outs

Pin	Symbol	I/O	Description
1	5V	P	Main Voltage Supply +ve input pin. 4.5V to 9.0V DC range nominal 5V.
2	TX	O	Asynchronous Serial Transmit pin. Connect this pin to the host controller Serial Receive (Rx) signal. The host receives data from uCAM-III via this pin. 3.3V Logic
3	RX	I	Asynchronous Serial Rec-+eive pin. Connect this pin to the host controller Serial Transmit (Tx) signal. The host transmits commands to the uCAM-III via this pin. 3.3V Logic, however 5V Tolerant
4	GND	P	Supply Ground.
5	RES	I	Hardware Reset, will reset the camera, Active Low

Note

I = Input, O = Output, P = Power

Pin Descriptions

5V pin 1 (Supply Voltage Input):

Module supply voltage input pin. This pin must be connected to a regulated supply voltage.
4.5V to 9.0V DC range, nominal 5.0V.

TX pin 2 (Serial Transmit):

Asynchronous Serial port Transmit pin, TX. Connect this pin to host Serial Receive (Rx) signal. The host receives data from the uCAM-III module via this pin. This pin outputs 3.3V logic.

RX pin 3 (Serial Receive):

Asynchronous Serial port Receive pin, RX. Connect this pin to host Serial Transmit (Tx) signal. The host transmits data to the uCAM-III via this pin. This pin is 3.3V Logic however is 5.0V tolerant.

GND pin 4 (Ground):

Module ground pin. This pin must be connected to the ground.

RES pin 5 (Reset):

Module hardware reset pin. This pin is optional but provides a way to reset the camera with an active low pulse.

Serial Interface - UART

The uCAM-III has a dedicated hardware UART that can communicate with a host via this serial port. This is the main interface used by the host to communicate with the module to send commands and receive back data. The primary features are:

• Full-Duplex 8-bit data transmission and reception through the TX and RX pins.
• Data format: 8 bits, No Parity, 1 Stop bit.
• Auto detects specific Baud rates from 9600 baud up to 921600 baud.
• Selectable Baud rates up to 3686400 bps.

The uCAM-III has low voltage serial TTL levels which can be directly interfaced to a microcontroller. The voltage levels could be converted to RS-232 through an external TTL to RS-232 converter to interface it to any RS-232 port such as the one on the PC.

Note

While the baud rate can go up to 3686400 bps, not all RS232/RS485/TTL USB adaptors/cables can go this high. Please ensure your hardware can handle the rate you want to use.
Please refer to the Auto-Baud Detect and Setting the Baud Rates sections for more information.

Single Byte Timing

A single-byte serial transmission consists of the start bit, 8 bits of data followed by the stop bit. The start bit is always 0, while a stop bit is always 1. The LSB (Least Significant Bit, Bit 0) is sent out first following the start bit. The figure below shows a single-byte transmission timing diagram.

Sync Command

A SYNC command consists of 6 continuous single-byte serial transmissions. The figure below shows an example of the SYNC (AA0D00000000h) command.

Please refer to the Initial (AA01h) section for more information regarding synchronising the uCAM-III.

Auto-Baud Detect

The module can auto-detect the baud rate of the incoming command. The host should make a connection with one of the following baud rates:

• 9600 bps
• 14400 bps
• 56000 bps
• 57600 bps
• 115200 bps
• 921600 bps

The module will keep using the last baud rate either auto-bauded or manually set until the next power cycle, or "full reset".

Note

The baud rate can be set higher than the baud rate determined by the Auto-Baud detect function. Refer to the Setting the Baud Rates

Setting the Baud Rates

You can set Baud rates using the Set Baud command, refer to the table under the SET BAUD RATE (AA07h)

Note

Baud rate changes hold until the full reset command is sent or the Power cycle occurs. So, you can synchronise at any of the Auto-detect Baud rates.

Sleep Mode

After the camera has been idle for 15 seconds (default) it enters sleep (low power) mode. To wake up the camera in this state it is necessary to send the Sync command. If the camera is required to stay awake, it is recommended to periodically send a Sync command, such as every 10 seconds, to prevent the camera from going to sleep if no other commands are being sent. If communications are occurring between the Host and the camera, the camera will not go to sleep until it has been idle for 15 seconds. If sleep timeout is not required, then the sleep functionality can be disabled by sending the sleep command and setting it to 0.

uCAM-III Power Supply

The uCAM-III can be powered in many ways, using a DC power supply from 4.5V to 9V, where the typical voltage recommended is 5V.

Some power supplies have a slow rise time, so if you are powering the uCAM-III directly from a power supply and start communicating with it, you may have issues with SYNC as the module may start up in a weird state due to the slow rise time. Testing of power supplies with a rise time of under 5uS resulted in correct operation. Power supplies with a rise time of greater than about 50uS resulted in trouble for SYNC.

It however is rare to encounter this issue.

As a general practice, it is highly recommended to utilize the hardware reset pin of the uCAM-III to reset the uCAM-III after powering it up, giving your power supply a chance to settle, and also then having the uCAM-III in a known state before you start communicating with it.

Taking advantage of the RESET pin will also enable your project/product/application to have supervisory control over the uCAM-III, in the rare case it becomes unresponsive, and provides your host controller with the means to resume operation without any external intervention.

Command Set

Command	ID Number	Parameter1	Parameter2	Parameter3	Parameter4
INITIAL	AA01h	00h	Image Format	RAW Resolution (Still Image only)	JPEG Resolution
GET PICTURE	AA04h	Picture Type	00h	00h	00h
SNAPSHOT	AA05h	Snapshot Type	Skip Frame (Low Byte)	Skip Frame (High Byte)	00h
SET PACKAGE SIZE	AA06h	08h	Package Size (Low Byte)	Package Size (High Byte)	00h
SET BAUD RATE	AA07h	1st Divider	2nd Divider	00h	00h
RESET	AA08h	Reset Type	00h	00h	XXh*
DATA	AA0Ah	Data Type	Length Byte 0	Length Byte 1	Length Byte 2
SYNC	AA0Dh	00h	00h	00h	00h
ACK	AA0Eh	Command ID	ACK Counter	00h or Package ID (Byte 0)	00h or Package ID (Byte 1)
NAK	AA0Fh	00h	NAK Counter	Error Number	00h
LIGHT	AA13h	Frequency Type	00h	00h	00h
CONTRAST BRIGHTNESS EXPOSURE	AA14h	Contrast: 0-4 (2 is Normal)	Brightness (0-4, 2 is Normal)	Exposure (0-4, 2 is '0')	00h
SLEEP	AA15h	Timeout (0-255)	00h	00h	00h

If parameter is 0xFF, command is a special Reset command and module responds to it immediately

Initial (AA01h)

The host issues this command to configure the image size and Image Format. After receiving this command, the module will send out an ACK command to the host if the configuration was successful. Otherwise, a NAK command will be sent out.

Image Format

The uCAM-III can support 4 different image formats as follow:

8-bit Gray Scale (RAW, 8-bit for Y only)	03h
16-bit Colour (RAW, CrYCbY)	08h
16-bit Colour (RAW, 565(RGB))	06h
JPEG	07h

RAW Resolution

The uCAM-III can support 4 different image resolutions when in RAW mode:

80 x 60	01h
160 x 120	03h
128 x 128	09h
128 x 96	0Bh

JPEG Resolution

The uCAM-III embedded JPEG Code can support only multiples of 16 pixels, therefore the JPEG mode can only support the following image sizes. It is different from the RAW mode.

160 x 128	03h
320 x 240	05h
640 x 480	07h
128 x 96	0Bh

Get Picture (AA04h)

The host issues this command to request a picture from the uCAM-III.

Picture Type

Snapshot Picture Mode	01h
RAW Picture Mode	02h
JPEG Picture Mode	05h

Snapshot (AA05h)

The uCAM-III will hold a single frame of still picture data in its buffer after receiving this command. This snapshot can then be retrieved from the buffer multiple times if required.

Snapshot Type

Compressed Picture (JPEG)	00h
Uncompressed Picture (RAW)	01h

Skip Frame Counter

The number of dropped frames can be defined before capture occurs. "0" keeps the current frame, "1" captures the next frame, and so on.

Set Package Size (AA06h)

The host issues this command to change the size of the data package which is used to transmit the compressed JPEG image data from the uCAM-III to the host. This command should be issued before sending SNAPSHOT or GET PICTURE commands to the uCAM-III.

Note

The size of the last package varies for different JPEG image sizes.

Package Size

The default size is 64 bytes and the maximum size is 512 bytes.

ID: Package ID, starts from one for an image

Data Size: Size of image data in the package

Verify Code: Error detection code, equals the lower byte of the sum of the whole package data except the verification code field. The higher byte of this code is always zero.
i.e. verify code = lowbyte(sum(byte[0] to byte[N-2]))

Note

1. Once the host receives the image size from the uCAM-III, the following simple equation can be used to calculate the number of packages that will be received according to the package size set. The package settings only apply to compressed JPEG images. Number of packages = Image size / (Package size - 6)
2. As the transmission of an uncompressed (RAW) image does not require the package mode, it is not necessary to set the package size for an uncompressed image. All of the pixel data for the RAW image will be sent continuously until completion.

Set Baud Rate (AA07h)

The host can set the Baud rates using this command. Use the table below as a guide.

Baud Rates

Baud Rate	1st Divider	2nd Divider
2400	31 (0x1F)	47 (0x2F)
4800	31 (0x1F)	23 (0x17)
9600	31 (0x1F)	11 (0x0B)
19200	31 (0x1F)	5
38400	31 (0x1F)	2
57600	31 (0x1F)	1
115200	31 (0x1F)	0
153600	7	2
230400	7	1
460800	7	0
921600	1	1
1228800	2	0
1843200	1	0
3686400	1	0

Note

3686400 baud is not achievable using the 4D programming cable or the PA5 due to the USB to Serial ICs used. To use this high-speed baud rate, please check if your serial port/device can handle this baud rate.

Reset (AA08h)

The host can reset by software the uCAM-III by issuing this command. If the comms are not responding, however, this will likely not work and will require either a power cycle or a hardware reset to be issued using Pin 5 of the 5-way header.

Reset Type

00h	Resets the whole system. The uCAM-III will reboot and reset all registers and state machines.
01h	Resets the state machines only.

Data (AA0Ah)

The uCAM-III issues this command to inform the host of the type and the size of the image data which is ready for transmitting to the host.

Data Type

Snapshot Picture	01h
RAW Picture	02h
JPEG Picture	05h

Length

These three bytes represent the length of data of the Picture that is ready for transmission back to the host.

Sync (AA0Dh)

The host issues this command to make a connection. The ACK command must be received after sending this command. Refer to the sync command section for more details.

ACK (AA0Eh)

This command indicates the success of the last operation. After receiving any valid command, the ACK command must be sent out except when getting data. The host can issue this command to request an image data package with the desired package ID after receiving the DATA command from the uCAM-III. The host should send this command with package ID F0F0h after receiving a package to end the package transfer.

Note

The field "command ID" should be 00h when the request is for the image data package.

Command ID

The command with that ID is acknowledged by this command.

ACK Counter

For debugging only.

Package ID

For acknowledging the DATA command, these two bytes represent the requested package ID. For acknowledging other commands, these two bytes are set to 00h.

NAK (AA0Fh)

This command indicates a corrupted transmission or unsupported features.

NAK Counter

For debugging only

Error Number

Picture Type Error	01h	Parameter Error	0Bh
Picture Up Scale	02h	Send Register Timeout	0Ch
Picture Scale Error	03h	Command ID Error	0Dh
Unexpected Reply	04h	Picture Not Ready	0Fh
Send Picture Timeout	05h	Transfer Package Number Error	10h
Unexpected Command	06h	Set Transfer Package Size Wrong	11h
SRAM JPEG Type Error	07h	Command Header Error	F0h
SRAM JPEG Size Error	08h	Command Length Error	F1h
Picture Format Error	09h	Send Picture Error	F5h
Picture Size Error	0Ah	Send Command Error	FFh

Light (AA13h)

The host issues this command to change the light frequency (hum) response of the uCAM-III.

Light Frequency Type

50Hz	00h
60Hz	01h

Contrast / Brightness / Exposure (AA14h)

The host issues this command to change the Contrast, White Balance and Exposure, based on the 3 parameters with this command.

Contrast

Min	00h
Low	01h
Normal (default)	02h
High	03h
Max	04h

Brightness

Min	00h
Low	01h
Normal (default)	02h
High	03h
Max	04h

Exposure

-2	00h
-1	01h
0 (default)	02h
+1	03h
+2	04h

Sleep (AA15h)

This command adjusts the sleep timeout of the uCAM-III from the default of 15 seconds, from disabled (0) to 255 seconds, using the commands 00h to FFh (0-255)

Command Protocol

This section outlines command usage and protocol transaction between the host and the uCAM-III module.

ACK and NAK responses are typical as replies from the Camera after sending a command, however, silence is also possible if the camera has gone to sleep. Please refer to the ACK (AA0Eh) and NAK (AA0Fh) sections for ACK/NAK information.

Synchronising the uCAM-III

Send the SYNC command until receiving the ACK command from uCAM-III (usually an ACK command is received after sending the SYNC command 25 times). This must be performed following a power-up.

Note

1. The host should send the SYNC command one by one continuously until receiving the ACK and SYNC commands back from the uCAM-III module. Sometimes up to 25 to 60 SYNC commands may be required before the module will respond. It is suggested that you start with a 5-ms pause between retries and increase by 1 ms for each additional retry. After receiving the response, the host should reply with the ACK command to finalise the synchronisation process.
2. After synchronising and establishing a communications link with the uCAM-III, allow up to 1-2 seconds before capturing the first image. The uCAM-III needs this time to allow its AGC and AEC circuits to stabilise, otherwise the received image luminance may be too high or too low.
3. The SYNC command is used to wake the camera up from Sleep (see SYNC Command section) and is also used to keep the camera awake by periodically sending this command. Periodically sending commands is only required if no commands have been sent. If communications are occurring between the Host and the Camera, the camera will stay awake. When they stop for 15 seconds (default), the camera will go to sleep and will require waking with the SYNC command. The sleep timeout can be adjusted using the sleep command.

INITIAL, GET PICTURE, SNAPSHOT, SET PACKAGE SIZE, RESET Commands

When an INITIAL, GET PICTURE, SNAPSHOT, SET PACKAGE SIZE, or RESET command is sent to the camera, the camera will simply reply with an ACK if successful. Please refer to the ACK (AA0Eh) and NAK (AA0Fh) sections for ACK/NAK information.

Example: Sending commands

Taking SNAPSHOT Pictures

Make sure a connection is established first before using the following communications.

Example: JPEG Snapshot Picture (640 x 480 resolution)

Note

• xx: Don't care
• zz: 01, 03, 05 or 07. Don't care in RAW mode
• ~~: Image size returned by uCAM-III

Lens Information

Standard lens models, T (Tele) 56°, N1 (Normal) 76°, W (Wide) 116°.

Referring to the table above (example), if the focused object is going to be approximately 1m away, follow the row for 'Focused Object Distance (meter)' = 1, and select the lens which suits your application best. If using the N1 (Normal) lens, if the object is focused at 1m, then the object should stay in focus between 0.64m and 2.25m without the lens needing to be adjusted.

F/No. is a parameter of the optics and refers to the Aperture. The Aperture controls the brightness of the image that passes through the lens and falls on the image sensor. It is expressed as an F-number (written as "F" followed by a number), such as F/1.8, F/2.0, F/2.4 etc.

The higher the number the smaller the aperture and the less light that passes through the lens, and the lower the number the larger the aperture and the more light that passes through the lens.

Out of the 3 lens options, if used in low light conditions, the Tele 56° lens will perform better than both the N1 and W lens options in terms of how much light they will let into the image sensor.

Aperture also changes the distance in front of and behind the focus point, which is why the N1 (normal) lens 'From' and 'To' ranges are the widest out of the 3 lenses offered, as it has the highest aperture number. This is referred to as the Depth of Field. An increased depth of field (larger gap between 'From' and 'To' values, will allow foreground and background objects to remain in focus, while a decreased depth of field might have these blurred while the main object is in focus.

The lens used on the uCAM-III uses an M12 x 0.5mm pitch thread, or so-called S-Mount lens - common on CMOS cameras and security cameras. These are available from a range of suppliers and can be used with the uCAM-III.

Lens drawings start on the next page.

56-Degree Lens Drawing

uCAM-III-56deg

76-Degree Lens Drawing

uCAM-III-76deg

116-Degree Lens Drawing

uCAM-III-116deg

Troubleshooting

Q) Cannot connect to the camera, SYNC always fails

A) Issuing a hardware reset signal after power has been applied, should resolve this issue. This can happen (rare) when the power supply you are using may have a slow rise time. Testing of power supplies with a rise time of under 5uS resulted in correct operation. Power supplies with a rise time of greater than about 50uS resulted in trouble for SYNC. After Reset, SYNC should be OK.

Q) Was connected to the camera but now it won't SYNC

A) Be sure you are doing the SYNC at the baud rate you were previously connected at. The uCAM-III will keep the baud rate that you had set until it is powered off. See Setting baud rates section. If you still cannot connect, you may need to restart the camera with a power cycle or by issuing a hardware reset.

Q) I am having trouble SYNC'ing with the uCAM-III

A) Please refer to Note 1 under Synchronising the uCAM-III section, and try the SYNC procedure.

Q) Cannot focus the camera on the target

A) Please refer to the table in section 9, and ensure you are using the correct lens for the distance to the object. Twist the lens in or out to adjust the focus, and secure using the lock nut.

Q) Camera no longer responding to Serial Commands

A) The uCAM-III will go to sleep after 15 seconds (default) of sitting idle. Sending the SYNC Command will wake the camera from sleep, and will enable normal operation once again. Sleep timeout can be adjusted using the SLEEP command.

Q) Camera not responding to anything

A) In rare situations the uCAM-III may stop responding. Resetting the uCAM-III using the Hardware Reset pint, or powering it off and on again should restore the correct operation.

Embedded Display Modules

The following display modules are ideal for many embedded applications with the uCAM-III camera. Many more display modules are available that are equally as compatible. Please refer to our website.

uOLED-96-G2

uOLED-128-G2

uOLED-160-G2

uLCD-144-G2

uLCD-24PTU

uLCD-28PTU

uLCD-32PTU

Workshop4 IDE

Workshop4 is a comprehensive software IDE that provides an integrated software development platform for all of the 4D family of processors and modules. The IDE combines the Editor, Compiler, Linker and Downloader to develop complete 4DGL application code for the relevant modules, and provides tools for modules that are not programmed.

When using the uCAM-III with Workshop4, a test application called "4D uCAM-III Demo" will be available to test the camera.

The following image illustrates how to connect the uCAM-III to a PC to use when testing the module with Workshop4, using the 4D Programming Cable.

Specifications

Recommended Operating Conditions

Parameter	Conditions	Min	Typ	Max	Units
Supply Voltage (VCC)		4.5	5.0	9.0	V
Input Voltage Range	RX pin, 3.3V but 5V tolerant	--	3.3	5.0	V
Startup delay	Time required after power is applied before SYNC can be sent.	--	800	--	ms
'First photo' delay	After SYNC, the time recommended for the camera to settle before the first photo should be taken	1000	--	2000	ms
'Shutter' delay.	Time after getpic is sent; to when image output begins.	--	150	200	ms
Operating Ambient Temp		-30	--	+85	°C
Storage Temperature	RH 95% max.	-40	--	+105	°C

Global Characteristics Based on Operating Conditions

Parameter	Conditions	Min	Typ	Max	Units
Supply Current (ICC)	VCC = 5.0V	--	75	90	mA
	Sleep / Standby	--	2	--	mA
Output Voltage Range	TX pin	2.4	3.3	--	V

Optical Characteristics (Rev 3.x)

Item	Parameter
Image Sensor	1/4" CMOS, 300K pixels -- Pixelplus POA030R
Pixel Size	5.55um x 5.55um
Effective Pixel Array	656 x 496
SNR	44.2dB @ 60 degree
Dynamic Range	51dB @ 60degree
White Balance	Automatic
Exposure	Automatic, 4 manual bias modifiers (2 above, and 2 below '0')
Contrast	Automatic, 4 manual bias modifiers (2 above, and 2 below 'Normal')
Brightness	Automatic, 4 manual bias modifiers (2 above, and 2 below 'Normal')
Lens viewing angle	56 degrees (Tele), 76 degrees (Normal), 116 degrees (Wide) - (3 different lens options). Refer to the Lens Information section.
Lens Construction	2P2G
Distortion	-2.1%
Dark Signal	25.2mV/sec
Sensitivity	2.93V/Lux.sec
Effective Image Area of the Image Sensor	3.64mm x 2.752mm

Optical Characteristics (Rev 4.x)

Item	Parameter
Image Sensor	1/4” CMOS, 300K pixels – Pixelplus PCB030K
Pixel Size	5.6um x 5.6um
Effective Pixel Array	688 x 528
SNR	48.7dB
Dynamic Range	65dB
White Balance	Automatic
Exposure	Automatic, 4 manual bias modifiers (2 above, and 2 below ‘0’)
Contrast	4 manual bias modifiers (2 above, and 2 below ‘Normal’)
Brightness	4 manual bias modifiers (2 above, and 2 below ‘Normal’)
Lens viewing angle (3 options)	56 degrees (Tele), 76 degrees (Normal), 116 degrees (Wide) - (3 different lens options).
Lens Construction	2P2G (typical)
Distortion	56 degrees lens (-4%), 76 degrees lens (-9.0%), 116 degrees lens (-35%H; -18%V)
Dark Signal	126.7 e/sec
Sensitivity	123.4K e/Lux.sec
Effective Image Area of the Image Sensor	3.85mm x 2.96mm

Note

The lens used on the uCAM-III uses an M12 x 0.5mm pitch thread, or so-called S-Mount lens - common on CMOS cameras and security cameras. These are available from a range of suppliers and can be used with the uCAM-III.

Spectral Response

Rev 3.x (POA030R) [5.55 um x 5.55 um]

Rev 4.x (PCB030K) [5.6 um x 5.6 um]

Note

This excludes both lens characteristics and optical source characteristics

Ordering Information

Ordering Information

Order Code:
uCAM-III (Shipped with 56-degree angle lens)
Packaging: 4D Box with foam padding

Note

76-degree and 116-degree lenses are provided additionally on request.

Revision History

Hardware Revision

Revision Number	Date	Description
3.0	05/2016	- Changes over uCAM-II (HW Revisions prior to 3.0) - Addition of Hardware Reset on 5-way header pin. - Addition of 128KB of RAM on the camera to allow uCAM to handle more complex images rather than degrade the picture quality. - Addition of new commands exposure, contrast and brightness control, as well as adjustable sleep timeouts.
3.1	09/2016	- Pullup Resistor on RX pin to prevent floating pin being mistaken as data. - Initial Public Release Revision
4.0	XX/2023	- Upgraded CMOS sensor to PCB030K Note: This version has the sensor rotated 90degrees
4.1	XX/2023	- Fixed sensor rotation to match previous 3.x and 2.x versions

Datasheet Revision

Revision Number	Date	Description
1.0	04/11/2016	Initial Public Release
1.1	25/03/2019	Cosmetic Changes to uCAM-III Datasheet
1.2	03/03/2021	- Updated F/No. information in the lens information section and added more descriptions around the Aperture and Depth of Field. - Removed redundant information from the tables under the specifications section
1.3	12/06/2021	Added Lens Drawings, and Effective Image Area of the Image Sensor spec
1.4	13/01/2023	Modified datasheet for web-based documentation.
1.5	26/05/2023	Added Rev 4.0 / 4.1 (uCAM-III) information
1.6	26/07/2023	Added mechanical dimensions
1.7	07/03/2024	Updated formatting for resource centre redesign