AT89C51RC2-3CSCM(2003) データシートの表示（PDF） - Atmel Corporation

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AT89C51RC2-3CSCM
(Rev.:2003)

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

AT89C51RB2/RC2

Blank Check Command

Description

Figure 41. Blank Check Flow

Host

Send Blank Check Command

Blank Check Command

Bootloader

Wait Blank Check Command

OR

Wait Checksum Error

COMMAND ABORTED

’X’ & CR & LF

OR Wait COMMAND_OK

COMMAND FINISHED

Wait Address not

erased

COMMAND FINISHED

’.’ & CR & LF

address & CR & LF

Checksum error

Send Checksum error

Flash blank

Send COMMAND_OK

Send first Address

not erased

Example

Blank Check ok

HOST

: 05 0000 04 0000 7FFF 01 78

BOOTLOADER : 05 0000 04 0000 7FFF 01 78 . CR LF

Blank Check ko at address xxxx

HOST

: 05 0000 04 0000 7FFF 01 78

BOOTLOADER : 05 0000 04 0000 7FFF 01 78 xxxx CR LF

Blank Check with checksum error

HOST

: 05 0000 04 0000 7FFF 01 70

BOOTLOADER : 05 0000 04 0000 7FFF 01 70 X CR LF CR LF

99

4180B–8051–04/03

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