AT89C51ED2-RDTUM datasheet(110/137 Pages) ATMEL

110 / 137 page

110

4235K–8051–05/08

AT89C51RD2/ED2

• Reading Frame

• EOF Frame/ Atmel Frame (only reading Atmel Frame)

Figure 24-12. Read Flow

24.9.8.1

Example

24.9.9

ISP Commands Summary

Host

Bootloader

Read Command

’X’ & CR & LF

RD_WR_SECURITY

Wait Read Command

Read Value

Send Security error

Send Data Read

Send Read Command

Wait Checksum Error

Wait Value of Data

Wait Security Error

COMMAND ABORTED

COMMAND FINISHED

Send Checksum error

COMMAND ABORTED

’L’ & CR & LF

’value’ & ’.’ & CR & LF

Checksum error

HOST

: 02 0000 05 07 02 F0

BOOTLOADER

: 02 0000 05 07 02 F0 Value . CR LF

HOST

: 02 0000 01 02 00 FB

BOOTLOADER

: 02 0000 01 02 00 FB Value . CR LF

Read function (read SBV)

Atmel Read function (read Bootloader version)

Table 24-9.

ISP Commands Summary

Command

Command Name

Data[0]

Data[1]

Command Effect

00h

Program Code

Program Nb Code Byte.

Bootloader will accept up to 128 (80h) data bytes. The data

bytes should be 128 byte page flash boundary.

AT89C51ED2-RDTUM Datasheet(PDF) 110 Page - ATMEL Corporation

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