T89C51CC01UA-RLTIM Atmel, T89C51CC01UA-RLTIM Datasheet - Page 21

• 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

Erasing the Flash
Requests from Host
Answers from
Bootloader
Example
4210E–CAN–03/08
The ID_WRITE_COMMAND flow described below allows the user to erase the Flash memory.
This operation can be executed only with a device previously opened in communication.
Two modes of Flash erasing are possible:
•
•
The Full Chip erase command erases the whole Flash (32 Kbytes) and sets some Configuration
Bytes to their default values:
•
•
•
The Block erase command erases only a part of the Flash.
Three Blocks are defined in the T89C51CC01:
•
•
•
T o s t a r t t h e e r a s i n g o p e r a t i o n , t h e H o s t s e n d s a “ w r i t e ” C A N m e s s a g e
(ID_WRITE_COMMAND).
As the Program Configuration Information flows, the erase block command has two possible
answers:
•
•
The full chip erase is always executed whatever the Software Security Byte value is.
On a full chip erase command an acknowledge “Command OK” is sent.
Full Chip erase
Block erase
BSB = FFh
SBV = FFh
SSB = FFh (NO_SECURITY)
block0 (from 0000h to 1FFFh)
block1 (from 2000h to 3FFFh)
block2 (from 4000h to 7FFFh)
If the chip is protected from program access an “Error” CAN message is sent (see
Section “Error Message Description”, page 22).
Otherwise an acknowledge is sent.
BOOTLOADER
Full Chip Erase
ID_WRITE_COMMAND
HOST
ID_WRITE_COMMAND
Identifier
Identifier
Id_write_command
Id_write_command
identifier
Length
2
Length
T89C51CC01 CAN Bootloader
1
Data[0]
control
00h
02
01
Data[0]
00h
00
00
data
Data[1]
00h
20h
40h
FFh
FF
// command_ok
Erase block2 (16K to 32K)
Erase block1 (8K to 16K)
Erase block0 (0K to 8K)
Command OK
Description
Full chip erase
Description
21