AT89C51CC03 Atmel Corporation, AT89C51CC03 Datasheet - Page 10

• Manufacturer Part Number: AT89C51CC03
• Manufacturer: Atmel Corporation

Specifications of AT89C51CC03

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 40 MHz
• Cpu: 8051-12C
• Max I/o Pins: 37
• Spi: 1
• Uart: 1
• Can: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART/CAN
• Watchdog: Yes

Protocol
Generic CAN Frame
Description
Command Description
10
AT89C51CC03 CAN Bootloader
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The CAN protocol manages directly using hardware a checksum and an acknowledge.
Note:
This protocol allows to:
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Overview of the protocol is detailed in APPENDIX-1.
Several CAN message identifiers are defined to manage this protocol.
It is possible to allocate a new value for CAN ISP identifiers by writing the byte CRIS with the
base value for the group of identifier.
The maximum value for CRIS is 7Fh and the default CRIS value is 00h.
Identifier:
Identifier identifies the frame (or message). Only the standard mode (11-bit) is used.
Control:
Control contains the DLC information (number of data in Data field) 4-bit.
Data:
Data field consists of zero to eight bytes. The interpretation within the frame depends on the
Identifier field.
Initiate the communication
Program the Flash or EEPROM Data
Read the Flash or EEPROM Data
Program Configuration Information
Read Configuration and Manufacturer Information
Erase the Flash
Start the application
To describe the ISP CAN Protocol, we use Symbolic name for Identifier, but default values are
given.
Identifier
ID_SELECT_NODE
ID_PROG_START
ID_PROG_DATA
ID_DISPLAY_DATA
ID_WRITE_COMMAND
ID_READ_COMMAND
ID_ERROR
Identifier
11-bit
Command Effect
Open/Close a communication with a node
Start a Flash/EEPROM programming
Data for Flash/EEPROM programming
Display data
Write in XAF, or Hardware Byte
Read from XAF or Hardware Byte and special data
Error message from bootloader only
Control
1 byte
8 bytes max
Data
4251B–CAN–03/08
[CRIS]0h
[CRIS]1h
[CRIS]2h
[CRIS]3h
[CRIS]4h
[CRIS]5h
[CRIS]6h
Value