T89C51RD2-SMSIM View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'T89C51RD2-SMSIM' PDF : 104 Pages View PDF
Command Data Stream Protocol
All commands are sent using the same flow. Each frame sent by the host is echoed by
the bootloader.
Figure 26. Command Flow
Host
Bootloader
Sends first character of the
":"
Frame
":"
If (not received ":")
Else
Sends echo and start
reception
Sends frame (made of 2 ASCII
characters per Byte)
Echo analysis
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
68 T89C51RD2
4243G–8051–05/03
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