C328V_UM - C328-7221 Mono Camera Module with UART Interface...

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C328-7221 Mono Camera Module with UART Interface User Manual Release Note: 1. 16 Mar, 2009 – official released v1.0 Rm 802, Nan Fung Ctr, Castle Peak Rd, Tsuen Wan NT, Hong Kong Tel: (852) 2498 6248 Fax (852) 2414 3050 Email: sales@comedia.com.hk http://www.comedia.com.hk C328-7221 Mono Camera Module 1 V1.0
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General Description The C328-7221 is VGA camera module which is specially designed for serial communication and working under low light condition. It performs as a JPEG compressed still camera and can be attached to a wireless or PDA host. Users can send out a snapshot command from the host in order to capture a full resolution single-frame still picture. The picture is then compressed by the JPEG engine and transferred to the host thru serial port. . C328-7221 Mono Camera Module 2 V1.0 Features z Small in size, 20x28mm z Monochrome image sensor used z 8-bit, 256-level grey level z Sensitive to IR, good for night vision z VGA resolution, down sample to QVGA z 3.3V operation z Low power consumption 105mA z User friendly commands for control z UART interface of up to 115.2Kbps z Auto detect baud rate and make connection to the host z Power saving mode z Various lens options Board Layout Pin VCC TxD RxD GND Description Power 3.3V DC Data Transmit (3.3V) Data Receive (3.3V) Power Ground Figure 1 – System Block Diagram VGA Image Sensor (Mono) Compression Engine UART Host EEPROM C32 ule 8-7221 camera mod 20mm RS-232 RS-232 J1 J1 EEPROM 3.3V Tx Rx GND 28mm Image Sensor DSP Bottom View Top View Figure 2 – C328 board layout and serial interface pin assignment
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Serial Interface 1. Baud Rate C328-7221 will auto detect baud rate and make connection to the host. C328-7221 supports 8 types of baud rate: 115200bps, 57600bps, 38400bps, 28800bps, 19200bps, 14400bps, 9600bps, 7200bps. 2. Single Byte Timing Diagram A single byte RS-232 transmission consists of the start bit, 8-bit contents and the stop bit. A start bit is always 0, while a stop bit is always 1. LSB is sent out first and is right after the start bit. Single Byte Transmission Start Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Stop Figure 3 – RS-232 single byte timing diagram 3. Command Timing Diagram A single command consists of 6 continuous single byte RS-232 transmissions. The following is an example of SYNC (AAh,0Dh,00h,00h,00h,00h) command. SYNC Command Single Byte 00h 00h 00h 00h AAh 0Dh Figure 4 – RS-232 SYNC command timing diagram Command Summary Command Function INITIAL To configure the image size GET PICTURE Get Picture type SNAPSHOT Set snap shot image type SET PACKAGE SIZE Set the package size to transmit data from module to Host SET BAUDRATE Change the baud rate RESET Reset the whole system or reset the state machine POWER OFF To enter sleep mode DATA Set the data type and length for transmitting data to host SYNC Sync signal to connect between host and module ACK Command to indicate the communication success NAK Command to indicate the communication fail with error code C328-7221 Mono Camera Module 3 V1.0
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This note was uploaded on 01/29/2012 for the course ECE 000 taught by Professor Sabaei during the Spring '11 term at Amirkabir University of Technology.

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C328V_UM - C328-7221 Mono Camera Module with UART Interface...

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