T89C51CC01UA-RLTIM Atmel, T89C51CC01UA-RLTIM Datasheet - Page 22

• Manufacturer Part Number: T89C51CC01UA-RLTIM
• Description: IC 8051 MCU FLASH 32K 44VQFP
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of T89C51CC01UA-RLTIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• For Use With: AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C51CC01UARLTIM

Starting the
Application
Requests from Host
Answer from Bootloader No answer is returned by the device.
Example
Error Message
Description
22
ID_WRITE_COMMAND
Identifier
T89C51CC01 CAN Bootloader
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).
Start application
BOOTLOADER
HOST
2
4
ID_ERROR
Identifier
Data[0]
03h
Id_write_command
No answer
identifier
Data[1]
00h
01h
Length
1
Data[2]
control
-
04
address
Data[0]
00h
03 01 00 00
data
Data[3]
-
Description
Start Application with a reset pulse
generation
Start Application with a jump at
“address”
Software Security Error
Description
4210E–CAN–03/08