AT89C51CC02 Atmel Corporation, AT89C51CC02 Datasheet - Page 23

• Manufacturer Part Number: AT89C51CC02
• Manufacturer: Atmel Corporation

Specifications of AT89C51CC02

• Flash (kbytes): 16 Kbytes
• Max. Operating Frequency: 40 MHz
• Cpu: 8051-12C
• Max I/o Pins: 20
• Uart: 1
• Can: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 0.5
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART/CAN
• Watchdog: Yes

Starting the
Application
Requests from Host
Answer from Bootloader No answer is returned by the device.
ID_WRITE_COMMAND Example
Error Message
Description
4208D–CAN–03/08
ID_WRITE_COMMAND
Identifier
The ID_WRITE_COMMAND flow described below allows to start the application directly from
the bootloader upon a specific command reception.
This operation can be executed only with a device previously opened in communication.
Two options are possible:
•
•
T o s t a r t t h e a p p l i c a t i o n , t h e H o s t s e n d s a “ S t a r t A p p l i c a t i o n ” C A N m e s s a g e
(ID_WRITE_COMMAND) with the corresponding option passed in parameter.
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).
BOOTLOADER
Start application
HOST
2
4
ID_ERROR
Identifier
Data[0]
03h
Id_write_command
No answer
identifier
Data[1]
00h
01h
Length
1
T89C51CC02 CAN Bootloader
Data[2]
control
-
04
address
Data[0]
00h
03 01 00 00
data
Data[3]
-
Start Application with a reset pulse
Software Security Error
Start Application with a jump at
Description
Description
generation
“address”
23