T89C51RD2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

T89C51RD2-3CSCM

0 to 40MHz Flash Programmable 8-bit Microcontroller

Atmel Corporation 

T89C51RD2

Description

Figure 27. Write/Program Flow

Host

Send Write Command

Write Command

Bootloader

Wait Write Command

OR

Wait Checksum Error

COMMAND ABORTED

’X’ & twice (CR & LF)

OR

Wait Security Error

COMMAND ABORTED

’P’ & CR & LF

Wait COMMAND_OK

COMMAND FINISHED

’.’ & CR & LF

Checksum error

Send Checksum error

NO_SECURITY

Send Security error

Wait Programming

Send COMMAND_OK

Example

Programming Data (write 55h at address 0010h in the Flash)

HOST

: 01 0010 00 55 9A

BOOTLOADER : 01 0010 00 55 9A . CR LF

Programming Atmel function (write SSB to level 2)

HOST

BOOTLOADER

: 02 0000 03 05 01 F5

: 02 0000 03 05 01 F5. CR LF

Writing Frame (write BSB to 55h)

HOST

BOOTLOADER

: 03 0000 03 06 00 55 9F

: 03 0000 03 06 00 55 9F . CR LF

69

4243G–8051–05/03

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