AT89C51CC03 Atmel Corporation, AT89C51CC03 Datasheet - Page 22

• 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

Example
Starting the
Application
Requests From Host
Answer From
Bootloader
Example
Error Message
Description
22
ID_WRITE_COMMAND
Identifier
AT89C51CC03 CAN Bootloader
The flow described below allows to start the application directly from the bootloader upon a spe-
cific command reception.
This operation can be executed only with a device previously opened in communication.
Two options are possible:
•
•
To start the application, the Host sends a “start application” CAN message (Id_write_command)
with the corresponding option passed in parameter.
No answer is returned by the device.
The error message is implemented to report when an action required is not possible.
•
Start the application with a reset pulse generation (using watchdog).
When the device receives this command the watchdog is enabled and the bootloader enters
a waiting loop until the watchdog resets the device.
Take care that if an external reset chip is used the reset pulse in output may be wrong and in
this case the reset sequence is not correctly executed.
Start the application without reset
A jump at the address 0000h is used to start the application without reset.
Length
At the moment only the security error is implemented and only the device can answer this
kind of CAN message (Id_error).
Full Chip Erase
BOOTLOADER
Start application
BOOTLOADER
HOST
HOST
2
4
ID_ERROR
data[0]
Identifier
03h
Id_write_command
Id_write_command
Id_write_command
No answer
identifier
identifier
data[1]
00h
01h
Length
1
data[2]
control
control
-
02
01
04
address
00
data[0]
00
03 01 00 00
data
data
data[3]
00h
-
FF
// command_ok
Description
Start Application with a reset pulse
generation
Start Application with a jump at
“address”
Software Security Error
Description
4251B–CAN–03/08