AT89C51AC2(2005) データシートの表示（PDF） - Atmel Corporation

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AT89C51AC2
(Rev.:2005)

80C51 Microcontrollers

Atmel Corporation 

Flow Description: Read Command

Host

Send Display Command

Display Command

OR

Wait Checksum Error

COMMAND ABORTED

’X’ & CR & LF

OR

Wait Security Error

COMMAND ABORTED

’L’ & CR & LF

Bootloader

Wait Display Command

Checksum Error

Send Checksum Error

RD_WR_SECURITY

Send Security Error

Read Data

All Data Read

Wait Display Data

’Address = ’

’Reading value’

CR & LF

Complete Frame

Send Display Data

All Data Read

COMMAND FINISHED

All Data Read

COMMAND FINISHED

Example

Display data from address 0000h to 0020h

HOST

BOOTLOADER

: 05 0000 04 0000 0020 00 D7

: 05 0000 04 0000 0020 00 D7

BOOTLOADER

BOOTLOADER

BOOTLOADER

0000=-----data------ CR LF

0010=-----data------ CR LF

0020=data CR LF

(16 data)

(16 data)

( 1 data)

14 A/T89C51AC2 UART Bootloader

4231C–CAN–03/05

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