AT89C51RC2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT89C51RC2-3CSCM

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

Atmel Corporation 

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Figure 41. Command Flow

Host

Sends first character of the

":"

Frame

":"

Sends frame (made of 2 ASCII

characters per Byte)

Echo analysis

AT89C51RB2/RC2

Bootloader

If (not received ":")

Else

Sends echo and start

reception

Gets frame, and sends back ec

for each received Byte

Write/Program Commands

This flow is common to the following frames:

• Flash/EEPROM Programming Data Frame

• EOF or Atmel Frame (only Programming Atmel Frame)

• Config Byte Programming Data Frame

• Baud Rate Frame

Description

Figure 42. Write/Program Flow

Host

Bootloader

Send Write Command

Write Command

Wait Write Command

OR

Wait Checksum Error

COMMAND ABORTED

’X’ & 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

99

4180E–8051–10/06

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