Atmel C51 Scheda Tecnica Scaricare il pdf (Pagina 99)

AT89C51RB2/RC2

4180E–8051–10/06

Figure 41. Command Flow

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

Bootloader

":"

Sends first character of the

Frame

If (not received ":")

Sends frame (made of 2 ASCII

Gets frame, and sends back

for each received Byte

Host

Else

":"

Sends echo and start

reception

characters per Byte)

Echo analysis

Host

Bootloader

Write Command

’X’ & CR & LF

NO_SECURITY

Wait Write Command

Checksum error

Wait Programming

Send Security error

Send COMMAND_OK

Send Write Command

Wait Checksum Error

Wait COMMAND_OK

Wait Security Error

COMMAND ABORTED

COMMAND FINISHED

Send Checksum error

COMMAND ABORTED

’P’ & CR & LF

’.’ & CR & LF

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 126 127

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Atmel C51 Scheda Tecnica Pagina 99

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