Atmel ATSTK500 500 Starter kit and development system. ATSTK500 ATSTK500 데이터 시트

 

2591C-AVR-06/06 

STK500 commands are sent in the MESSAGE_BODY part of a message (see 
chapter 2). This section describes all commands that can be entered to the STK500, 
and all the possible responses that each command can give back to the host. 

In general, all programming modes use the same protocol commands, but various 
parameters are sent with the different programming modes in order to avoid 
unnecessary overhead in the protocol layer.  

For all commands, the STK500 will return an answer with an answer ID that is equal 
to the command ID. The first byte in a command is always the command ID, the first 
byte in an answer is always the answer ID. 

These commands are not related to a specific programming mode. 

This command returns a unique signature string for the STK500/AVRISP with this 
implementation of the protocol. The signature is “STK500_2” or “AVRISP_2”. 

Table 5-1. Command format 

Command ID 

1 byte 

CMD_SIGN_ON 

Command id 

 

Table 5-2. Answer format if target is an STK500 

Answer ID 

1 byte 

CMD_SIGN_ON 

Answer id 

Status 1 

byte 

STATUS_CMD_OK 

 

Signature length 

1 byte 

8 

Length of signature string 

 8 

bytes 

“STK500_2” 

The signature string (not 
null-terminated) 

 

Table 5-3. Answer format if target is an AVRISP 

Answer ID 

1 byte 

CMD_SIGN_ON 

Answer id 

Status 1 

byte 

STATUS_CMD_OK 

 

Signature length 

1 byte 

8 

Length of signature string 

 8 

bytes 

“AVRISP_2” 

The signature string (not 
null-terminated)