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7.1.4 CMND_ENTER_PROGMODE
This command enables communication between the STK600 and the target MCU and
should be the first JTAG command sent to the STK600. After receiving this command
the MCU is held in reset state and memory read and write is allowed.
Table 7-10. Command format.
Field
AVR8JTAG id
Message ID
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
CMND_ENTER_PROGMODE (0x14)
Description
Command id
Table 7-11. Answer format.
Field
Answer id
status
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
STATUS_CMD_OK
STATUS_CMD_FAILED
Description
Answer id
If failed the JTAG id was not read successfully
from target
7.1.5 CMND_LEAVE_PROGMODE
This command releases the target MCU which will run freely from the reset vector.
Table 7-12. Command format.
Field
AVR8JTAG id
Message ID
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
CMND_LEAVE_PROGMODE (0x15)
Description
Command id
Table 7-13. Answer format.
Field
Answer id
status
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
STATUS_CMD_OK
Description
Answer id
7.1.6 CMND_CHIP_ERASE
This command erases all memory and releases the lock bits of the target MCU.
Table 7-14. Command format.
Field
AVR8JTAG id
Message ID
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
CMND_CHIP_ERASE (0x13)
Description
Command id
Table 7-15. Answer format.
Field
Answer id
status
Size
1 byte
1 byte
Values
CMD_JTAG_AVR
STATUS_CMD_OK
Description
Answer id
STATUS_CMD_TOUT
28
AVR079
8133A-AVR-04/08
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