Datasheet

14
AVR079
8133A-AVR-04/08
Field Size Values Description
NumTx 1 byte 0-255 Number of bytes to transmit
NumRx 1 byte 0-255 Number of bytes to receive
RxStartAddr 1 byte
Start address of returned data. Specifies on what
transmitted byte the response is to be stored and
returned.
TxData 0-255 bytes
The data to be transmitted. The size is specified
by NumTx
If the number of bytes to receive is greater than number of bytes to transmit, then the
firmware will pad with the necessary 0x00 bytes. This is in order to save time-
consuming transfer from PC to the programmer.
Table 4-18. Answer format.
Field Size Values Description
Answer ID 1 byte CMD_SPI_MULTI Answer id
Status1 1 byte STATUS_CMD_OK Will always read OK
data 0-255 bytes
The data read from the ISP bus as indicated in
the command
Status2 1 byte STATUS_CMD_OK Will always read OK
5 Parallel Programming Mode Commands
5.1 CMD_ENTER_PROGMODE_PP
This command will make the target device enter programming mode if it succeeds.
XML PATH: /AVRPART/ICE_SETTINGS/STK600/PpEnterProgMode/
Table 5-1. Command format.
Field Size Values Description
Command ID 1 byte CMD_ENTER_PROGMODE_PP Command id
stabDelay 1 byte XML: stabDelay Delay (in ms) used for pin stabilization
progModeDelay 1 byte XML: progModeDelay
Delay (in ms) in connection with the EnterProgMode
command execution
latchCycles 1 byte XML: latchCycles Number of xtal cycles used to latch OSCCAL
toggleVtg 1 byte XML: toggleVtg
Toggle Vtg when entering prog.mode (0=no, 1=yes). For
parts with RSTDSBL functionality
powerOffDelay 1 byte XML: powerOffDelay
Power-off delay. Additional delay (in ms) after Vtg is turned
off in order to make sure the Vtg is low enough
resetDelayMs 1 byte XML: resetDelayMs
RSTDELAY #1 (in ms) Additional delay between Vtg is
turned on and reset goes high.
resetDelayUs 1 byte XML: resetDelayUs
RSTDELAY #2(in us x 10) Additional delay between Vtg is
turned on and reset goes high. Total delay is RSTDELAY
#1 (ms) + RSTDELAY #2 (us x 10)