AVR061: STK500 Communication Protocol
Introduction
This document describes the protocol for the STK500 starterkit. This protocol is based
on earlier protocols made for other AVR tools and is fully compatible with them in that
there should not be any overlapping or redefined commands.
The following sections describes each part of the protocol in detail. All commands
(both commands and responses) are standard ASCII characters between 0x00 - 0x7F.
Data can be any character with value between 0x00 - 0xFF.
The definition of all commands, responses, parameters and other defined values can
be found in the file "command.h". The device codes can be found in the file
"devices.h". These files are located in the software section on Atmel web site,
www.atmel.com.
At the end of this document, there is an overview of device codes, signatures, Fuse
bits and Lock bits for each currently supported device.
8-bit
STK500
Communication
Protocol
Application
Note
Rev. 2525B–AVR–04/03
1
Response Definitions
This section describes the meaning of the valid responses from the STK500 starterkit.
Some of the responses will be part of more complex responses also containing data,
depending on the command.
OK
Response
Resp_STK_OK is sent after a valid command has been executed.
Failed
Response
Resp_STK_FAILED is sent if a command execution fails.
Insync
Response
Resp_STK_INSYNC is sent after Sync_CRC_EOP has been received.
Nosync
Response
Resp_STK_NOSYNC is sent if Sync_CRC_EOP is not received after a command.
Unknown
Response
Resp_STK_UNKNOWN is sent as a response to an unknown command, if the unknown
command is directly followed by Sync_CRC_EOP.
Nodevice
Response
2
Resp_STK_NODEVICE is sent as a response to a Cmnd_STK_ENTER_PROGMODE
command if the proper device parameters has not been set with
Cmnd_STK_SET_DEVICE first.
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Command
Definitions
This section defines the commands that are understood by the STK500 starterkit.
Check if Starterkit
Present
The PC sends this command to check if the starterkit is present on the communication
channel.
Command
Cmnd_STK_GET_SIGN_ON, Sync_CRC_EOP
Command Value
0x31
Response
Resp_STK_INSYNC, sign_on_message, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 1. Parameters
Parameter Name
Field Usage
Field Format
sign_on_message
Text string. Always “AVR STK”
7 bytes
Get Synchronization
Use this command to try to regain synchronization when sync is lost. Send this command until Resp_STK_INSYNC is received.
Command
Cmnd_STK_GET_SYNC, Sync_CRC_EOP
Command Value
0x30
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 2. Parameters
Parameter Name
Field Usage
Field Format
(No parameters)
–
–
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Get Parameter Value
Get the value of a valid parameter from the STK500 starterkit. If the parameter is not
used, the same parameter will be returned together with a Resp_STK_FAILED
response to indicate the error. See the parameters section for valid parameters and their
meaning.
Command
Cmnd_STK_GET_PARAMETER, parameter, Sync_CRC_EOP
Command Value
0x41
Response
Resp_STK_INSYNC, value, Resp_STK_OK
or
Resp_STK_INSYNC, parameter, Resp_STK_FAILED
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 3. Parameters
Parameter Name
Field Usage
Field Format
parameter
Any valid parameter as defined in “command.h”
1 byte (0x00 - 0x7F)
value
Any 8-bit value
1 byte (0x00 - 0xFF)
Set Parameter Value
Set the value of a valid parameter in the STK500 starterkit. See the parameters section
for valid parameters and their meaning.
Command
Cmnd_STK_SET_PARAMETER, parameter, value, Sync_CRC_EOP
Command Value
0x40
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_INSYNC, parameter, Resp_STK_FAILED
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 4. Parameters
4
Parameter Name
Field Usage
Field Format
parameter
Any valid parameter as defined in COMMON.H
1 byte (0x00 - 0x7F)
value
Any 8-bit value
1 byte (0x00 - 0xFF)
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Set Device Programming
Parameters
Set the device Programming parameters for the current device. These parameters must
be set before the starterkit can enter Programming mode.
Command
Cmnd_STK_SET_DEVICE, devicecode, revision, progtype, parmode, polling, selftimed,
lockbytes, fusebytes, flashpollval1, flashpollval2, eeprompollval1, eeprompollval2, pagesizehigh, pagesizelow, eepromsizehigh, eepromsizelow, flashsize4, flashsize3,
flashsize2, flashsize1, Sync_CRC_EOP
Command Value
0x42
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 5. Parameters
Parameter Name
Field Usage
Field Format
devicecode
Device code as defined in “devices.h”
1 byte
revision
Device revision. Currently not used. Should be set to 0.
1 byte
progtype
Defines which Program modes is supported:
“0” – Both Parallel/High-voltage and Serial mode
“1” – Only Parallel/High-voltage mode
1 byte
parmode
Defines if the device has a full parallel interface or a
pseudo parallel programming interface:
“0” – Pseudo parallel interface
“1” – Full parallel interface
1 byte
polling
Defines if polling may be used during SPI access:
“0” – No polling may be used
“1” – Polling may be used
1 byte
selftimed
Defines if programming instructions are self timed:
“0” – Not self timed
“1” – Self timed
1 byte
lockbytes
Number of Lock bytes. Currently not used. Should be set
to actual number of Lock bytes for future compability.
1 byte
fusebytes
Number of Fuse bytes. Currently not used. Should be set
to actual number of Fuse bytes for future caompability.
1 byte
flashpollval1
FLASH polling value. See Data Sheet for the device.
1 byte
flashpollval2
FLASH polling value. Same as “flashpollval1”
1 byte
eeprompollval1
EEPROM polling value 1 (P1). See data sheet for the
device.
1 byte
eeprompollval2
EEPROM polling value 2 (P2). See data sheet for device.
1 byte
pagesizehigh
Page size in bytes for pagemode parts, High Byte of 16bit value.
1 byte
pagesizelow
Page size in bytes for pagemode parts, Low Byte of 16bit value.
1 byte
eepromsizehigh
EEPROM size in bytes, High Byte of 16-bit value.
1 byte
eepromsizelow
EEPROM size in bytes, Low Byte of 16-bit value.
1 byte
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Table 5. Parameters (Continued)
Parameter Name
Field Usage
Field Format
flashsize4
FLASH size in bytes, byte 4 (High Byte) of 32-bit value.
1 byte
flashsize3
FLASH size in bytes, byte 3 of 32-bit value.
1 byte
flashsize2
FLASH size in bytes, byte 2 of 32-bit value.
1 byte
flashsize1
FLASH size in bytes, byte 1 (Low Byte) of 32-bit value.
1 byte
Set Extended Device
Programming
Parameters
Set extended programming parameters for the current device.
Command
Cmnd_SET_DEVICE_EXT, commandsize, eeprompagesize, signalpagel, signalbs2,
Synch_CRC_EOP
Command Value
0x45
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (if no Sync_CRC_EOP received)
Table 6. Parameters
Parameter Name
Field Usage
Field Format
commandsize
Defines how many bytes of additional parameters the command contains. In this case it’s value
should be 4 (for the eepromsize, signalpagel and signalbs2 parameters). The STK500 may
accept more parameters in later revisions.
1 byte
eeprompagesize
EEPROM page size in bytes.
1 byte
signalpagel
Defines to which port pin the PAGEL signal should be mapped. Example: signalpagel = 0xD7. In
this case PAGEL should be mapped to PORTD7.
1 byte
signalbs2
Defines to which port pin the BS2 signal should be mapped. See signalpagel.
1 byte
ResetDisable
Defines whether a part has RSTDSBL Fuse (value = 1) or not (value = 0).
1 byte
6
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Enter Program Mode
Enter Programming mode for the selected device. The Programming mode and device
programming parameters must have been set by Cmnd_STK_SET_DEVICE prior to
calling this command, or the command will fail with a Resp_STK_NODEVICE response.
Command
Cmnd_STK_ENTER_PROGMODE, Sync_CRC_EOP
Command Value
0x50
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_INSYNC, Resp_STK_NODEVICE
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 7. Parameters
Parameter Name
Field Usage
Field Format
(No parameter)
–
–
Leave Program Mode
Leave programming mode.
Command
Cmnd_STK_LEAVE_PROGMODE, Sync_CRC_EOP
Command Value
0x51
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Parameters:
Table 8. Parameters
Parameter Name
Field Usage
Field Format
(No parameter)
–
–
Chip Erase
Erase device.
Command
Cmnd_STK_CHIP_ERASE, Sync_CRC_EOP
Command Value
0x52
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 9. Parameters
Parameter Name
Field Usage
Field Format
(No parameter)
–
–
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Check for Address
Autoincrement
Check if the write/read address is automatically incremented while using the
Cmnd_STK_PROG/READ_FLASH/EEPROM commands. Since STK500 always autoincrements the address, this command will always be successful.
Command
Cmnd_STK_CHECK_AUTOINC, Sync_CRC_EOP
Command Value
0x53
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 10. Parameters
Parameter Name
Field Usage
Field Format
(No parameter)
–
–
Load Address
Load 16-bit address down to starterkit. This command is used to set the address for the
next read or write operation to FLASH or EEPROM. Must always be used prior to
Cmnd_STK_PROG_PAGE or Cmnd_STK_READ_PAGE.
Command
Cmnd_STK_LOAD_ADDRESS, addr_low, addr_high, Sync_CRC_EOP
Command Value
0x55
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 11. Parameters
Parameter Name
Field Usage
Field Format
addr_low
LSB byte of address
1 byte
addr_high
MSB byte of address
1 byte
Program Flash Memory
Program one word in FLASH memory.
Command
Cmnd_STK_PROG_FLASH, flash_low, flash_high, Sync_CRC_EOP
Command Value
0x60
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 12. Parameters
8
Parameter Name
Field Usage
Field Format
flash_low
Low byte of word to program
1 byte
flash_high
High byte of word to program
1 byte
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Program Data Memory
Program one byte in EEPROM memory.
Command
Cmnd_STK_PROG_DATA, data, Sync_CRC_EOP
Command Value
0x61
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 13. Parameters
Program Fuse Bits
Parameter Name
Field Usage
Field Format
data
Byte to program
1 byte
Program Fuse bits. The Fuse bit mapping for the currently supported devices is
described in the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Command
Cmnd_STK_PROG_FUSE, fuse_low, fuse_high, Sync_CRC_EOP
Command Value
0x62
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 14. Parameters
Parameter Name
Field Usage
Field Format
fuse_low
Low byte of Fuse bits
1 byte
fuse_high
High byte of Fuse bits
1 byte
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Program Fuse Bits
Extended
Program Extended Fuse bits. The Fuse bit mapping for the currently supported devices
is described in the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Command
Cmnd_STK_PROG_FUSE_EXT, fuse_low, fuse_high, fuse_ext, Sync_CRC_EOP
Command Value
0x65
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 15. Parameters
Program Lock Bits
Parameter Name
Field Usage
Field Format
fuse_low
Low byte of Fuse bits
1 byte
fuse_high
High byte of Fuse bits
1 byte
fuse_ext
Extended byte of Fuse bits
1 byte
Program Lock bits. The Lock bit mapping for the currently supported devices is
described in the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Command
Cmnd_STK_PROG_LOCK, Synch_CRC_EOP
Command Value
0x63
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 16. Parameters
10
Parameter Name
Field Usage
Field Format
lock
Lock bits as defined by datasheets
[BYTE]
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Program Page
Download a block of data to the starterkit and program it in FLASH or EEPROM of the
current device. The data block size should not be larger than 256 bytes.
Command
Cmnd_STK_PROG_PAGE, bytes_high, bytes_low, memtype, data, Sync_CRC_EOP
Command Value
0x64
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 17. Parameters
Parameter Name
Field Usage
Field Format
bytes_high
High byte of data block size
1 byte
bytes_low
Low byte of data block size
1 byte
memtype
Memory type: “E” – EEPROM, “F” – FLASH
1 byte
data
Data to program into FLASH or EEPROM. If
programming to FLASH, the sequence of data is
lowbyte:highbyte.
((bytes_high << 8)
| bytes_low) bytes.
Read Flash Memory
Read one word from FLASH memory.
Command
Cmnd_STK_READ_FLASH, Sync_CRC_EOP
Command Value
0x70
Response
Resp_STK_INSYNC, flash_low, flash_high, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 18. Parameters
Parameter Name
Field Usage
Field Format
flash_low
Low byte
1 byte
flash_high
High byte
1 byte
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Read Data Memory
Read one byte from EEPROM memory.
Command
Cmnd_STK_READ_DATA, Sync_CRC_EOP
Command Value
0x71
Response
Resp_STK_INSYNC, data, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 19. Parameters
Read Fuse Bits
Parameter Name
Field Usage
Field Format
data
Data byte
1 byte
Read Fuse bits. The Fuse bit mapping for the currently supported devices is described
in the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Note that some devices combine Lock bits and Fuse bits in way that actually requires
using the Cmnd_STK_READ_LOCK to retrieve the Fuse byte(s). This is described
closer in the appendix.
Command
Cmnd_STK_READ_FUSE, Sync_CRC_EOP
Command Value
0x72
Response
Resp_STK_INSYNC, fuse_low, fuse_high, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 20. Parameters
12
Parameter Name
Field Usage
Field Format
fuse_low
Low byte of Fuse bits
1 byte
fuse_high
High byte of Fuse bits
1 byte
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Read Fuse Bits Extended Read Extended Fuse bits. The Fuse bit mapping for the currently supported devices is
described in the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Note that some devices combine Lock bits and Fuse bits in way that actually requires
using the Cmnd_STK_READ_LOCK to retrieve the Fuse byte(s). This is described
closer in the appendix.
Command
Cmnd_STK_READ_FUSE_EXT
Command Value
0x77
Response
Resp_STK_INSYNC, fuse_low, fuse_high, fuse_ext, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 21. Parameters
Read Lock Bits
Parameter Name
Field Usage
Field Format
fuse_low
Low byte of Fuse bits
1 byte
fuse_high
High byte of Fuse bits
1 byte
fuse_ext
Extended byte of Fuse bits
1 byte
Read Lock bits. The Lock bit mapping for the currently supported devices is described in
the appendix.
Note:
For ISP Programming, use the Cmnd_STK_UNIVERSAL command with the appropriate
ISP command bytes (found in the device data sheet).
Note that some device combine Lock bits and Fuse bits in way that requires some modification of the read-back fuse before it can be interpreted normally. This is described
closer in the appendix.
Command
Cmnd_STK_READ_LOCK, Sync_CRC_EOP
Command Value
0x73
Response
Resp_STK_INSYNC, lock, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 22. Parameters
Parameter Name
Field Usage
Field Format
lock
Lock bits
1 byte
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Read Page
Read a block of data from FLASH or EEPROM of the current device. The data block
size should not be larger than 256 bytes.
Command
Cmnd_STK_READ_PAGE, bytes_high, bytes_low, memtype, Sync_CRC_EOP
Command Value
0x74
Response
Resp_STK_INSYNC, data, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 23. Parameters
Parameter Name
Field Usage
Field Format
bytes_high
High byte of data block size
1 byte
bytes_low
Low byte of data block size
1 byte
memtype
Memory type: “E” – EEPROM, “F” – FLASH
1 byte
data
Data to program into FLASH or EEPROM. If
programming to FLASH, the sequence of data is
lowbyte:highbyte.
((bytes_high << 8)
| bytes_low) bytes.
Read Signature Bytes
Read signature bytes.
Command
Cmnd_STK_READ_SIGN, Sync_CRC_EOP
Command Value
0x75
Response
Resp_STK_INSYNC, sign_high, sign_middle, sign_low, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 24. Parameters
14
Parameter Name
Field Usage
Field Format
sigh_high
High byte of signature
1 byte
sign_middle
Middle byte of signature
1 byte
sign_low
Low byte of signature
1 byte
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Read Oscillator
Calibration Byte
Read Oscillator calibration byte.
Command
Cmnd_STK_READ_OSCCAL, Sync_CRC_EOP
Command Value
0x76
Response
Resp_STK_INSYNC, osc_cal_byte, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 25. Parameters
Parameter Name
Field Usage
Field Format
osc_cal_byte
Oscillator callibration byte
1 byte
Read Oscillator
Calibration Byte
Extended
Read Oscillator calibration byte.
Command
Cmnd_STK_READ_OSCCAL_EXT, address, Sync_CRC_EOP
Command Value
0x78
Response
Resp_STK_INSYNC, osc_cal_byte, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 26. Parameters
Parameter Name
Field Usage
Field Format
address
Address of the oscillator callibration byte to read
1 byte
osc_cal_byte
Oscillator callibration byte
1 byte
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Universal Command
Universal command is used to send a generic 32-bit data/command stream directly to
the SPI interface of the current device. Shifting data into the SPI interface at the same
time shifts data out of the SPI interface. The response of the last eight bits that are
shifted out are returned.
Currently this command is used to read and write Fuse and Lock bits in Serial/High-voltage mode. For more information, see the appendix.
Command
Cmnd_STK_UNIVERSAL, byte1, byte2, byte3, byte4, Sync_CRC_EOP
Command Value
0x56
Response
Resp_STK_INSYNC, byte4_out, Resp_STK_OK
or
Resp_STK_NOSYNC (If no Sync_CRC_EOP received)
Table 27. Parameters
Parameter Name
Field Usage
Field Format
byte1
First byte of SPI data/command
1 byte
byte2
Second byte of SPI data/command
1 byte
byte3
Third byte of SPI data/command
1 byte
byte4
Fourth byte of SPI data/command
1 byte
byte4_out
The response of the last eight bits to be shifted out from
the SPI interface
1 byte
Extended Universal
Command
Extended SPI universal command used to clock any number of bytes to the SPI interface of the current device.
Command
Cmnd_STK_UNIVERSAL_MULTI, number_of_bytes, data bytes, Sync_CRC_EOP.
Table 28. Parameters
Parameter Name
Field Usage
Field Format
number_of_bytes
0 - 255 equals 1 - 256 bytes to be sent
1 byte
Command Value
0x57
Response
Resp_STK_INSYNC, Resp_STK_OK
or
Resp_STK_NOSYNC (if no Sync_CRC_EOP received)
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Parameter Definitions
Hardware Version
This parameter defines the version of the starterkit hardware.
Parameter
Parm_STK_HW_VER
Access: Read only
Table 29.
Value
Description
–
–
Parameter Value
0x80
Software Version Major
The major version of the starterkit MCU software.
Parameter
Parm_STK_SW_MAJOR
Access: Read Only
Table 30.
Value
Description
–
–
Parameter Value
0x81
Software Version Minor
The minor version of the starterkit MCU software.
Parameter
Parm_STK_SW_MINOR
Access: Read only
Table 31.
Parameter Value
Value
Description
–
–
0x82
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Status LED
Sets or retrieves the current setting of the status LED on the starterkit. The status LED
on the starterkit is a dual LED which can emit red light, green light or both (yellow).
Parameter
Parm_STK_LEDS
Access: Read/Write
Table 32.
Value
Description
0
Status LED off
1
Green on
2
Red on
3
Green and red both on
Parameter Value
0x83
Target Voltage
(VTARGET)
Sets or retrieves the current target voltage (VTARGET). The actual voltage is a function
of the parameter:
Real target voltage = [Parm_STK_VTARGET]/10.0
Parameter
Parm_STK_VTARGET
Access: Read/Write
Table 33.
Value
Description
–
–
Parameter Value
0x84
Adjustable Voltage
(AREF)
Sets or retrieves the current adjustable voltage (AREF). The actual voltage is a function
of the parameter:
Real adjustable voltage = [Parm_STK_VADJUST]/10.0
Parameter
Parm_STK_VADJUST
Access: Read/Write
Table 34.
Parameter Value
18
Value
Description
–
–
0x85
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Oscillator Timer
Prescaler Value
Sets or retrieves the current prescaler value for the timer in the mcu that is used to generate the adjustable Oscillator. The actual Oscillator frequency is a function of the
Parm_STK_OSC_PSCALE and the Parm_STK_OSC_CMATCH parameters. See the
Table 35 below.
Parameter
Parm_STK_OSC_PSCALE
Access: Read/Write
Table 35.
Value
Oscillator Frequency
0
Oscillator off
1
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 1 * 2)
2
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 8 * 2)
3
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 32 * 2)
4
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 64 * 2)
5
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 128 * 2)
6
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 256 * 2)
7
mcu_freq/(([Parm_STK_OSC_CMATCH] + 1) * 1024 * 2)
Parameter Value
0x86
Oscillator Timer
Compare Match Value
Sets or retrieves the current compare match value for the timer in the mcu that is used to
g ene rate th e a dju stable O scilla to r. See the d escriptio n o f th e
Parm_STK_OSC_PSCALE parameter.
Parameter
Parm_STK_OSC_CMATCH
Access: Read/Write
Table 36.
Value
Description
–
–
Parameter Value
0x87
ISP SCK Duration
Sets or retrieves the parameter for the current ISP SCK half-period duration. To ensure
correct programming, this parameter should be set to the following criteria:
[Parm_STK_SCK_DURATION] > (8*10^6 / target_freq) - 2
Parameter
Parm_STK_SCK_DURATION
Access: Read/Write
Table 37.
Parameter Value
Value
Description
–
–
0x89
19
2525B–AVR–04/03
Buffer Size
These parameters retrieve the size of the communication buffer in the starterkit MCU.
The parameters form a 16-bit value, where Parm_STK_BUFSIZEH is the high byte and
Parm_STK_BUFSIZEL is the Low byte.
Parameter
Parm_STK_BUFSIZEH:Parm_STK_BUFSIZEL
Access: Read only
Table 38.
Value
Description
–
–
Parameter Value
0x91:0x90
Topcard Detect
Retrieves information about whether there is a top-card mounted on the STK500 or not.
Parameter
Param_STK500_TOPCARD_DETECT
Access: Read only
Table 39.
Parameter Value
20
Value
Description
0
Reserved for future use
1
STK502 detected
2
STK501 detected
3
No top-card detected
0x98
AVR061
2525B–AVR–04/03
AVR061
Appendix
Reserved Commands
There are several commands (or command characters) that are reserved and should
not be used for this product. They are either used for other AVR products or are
reserved for future use. All reserved commands will return a NACK response (character
“?”) to indicate that they are not used. The reserved commands are listed below without
further comments:
•
“%”
•
“:”
•
“<“
•
“>”
•
“I”
•
“i”
•
“Q”
•
“q”
•
“U”
•
“u”
•
“Z”
21
2525B–AVR–04/03
Device Codes
22
Table 40. Device Codes
Revision
A
B
C
D
E
F
G
H
ATtiny11
0x11
–
–
–
–
–
–
–
ATtiny12
0x12
–
–
–
–
–
–
–
ATtiny15
0x13
–
–
–
–
–
–
–
ATtiny22
0x20
–
–
–
–
–
–
–
ATtiny26
0x21
–
–
–
–
–
–
–
ATtiny28
0x28
–
–
–
–
–
–
–
AT90S1200
0x33
–
–
–
–
–
–
–
AT90S2313
0x40
–
–
–
–
–
–
–
AT90S2323
0x41
–
–
–
–
–
–
–
AT90S2333
0x42
–
–
–
–
–
–
–
AT90S2343
0x43
–
–
–
–
–
–
–
AT90S4414
0x50
–
–
–
–
–
–
–
AT90S4433
0x51
–
–
–
–
–
–
–
AT90S4434
0x52
–
–
–
–
–
–
–
AT90S8515
0x60
–
–
–
–
–
–
–
AT90S8535
0x61
–
–
–
–
–
–
–
ATmega8
0x62
–
–
–
–
–
–
–
ATmega8515
0x63
–
–
–
–
–
–
–
ATmega8535
0x64
–
–
–
–
–
–
–
ATmega161
0x80
–
–
–
–
–
–
–
ATmega163
0x81
–
–
–
–
–
–
–
ATmega16
0x82
–
–
–
–
–
–
–
ATmega162
0x83
–
–
–
–
–
–
–
ATmega169
0x84
–
–
–
–
–
–
–
ATmega323
0x90
–
–
–
–
–
–
–
ATmega32
0x91
–
–
–
–
–
–
–
ATmega64
0xA0
–
–
–
–
–
–
–
ATmega103
0xB1
–
–
–
–
–
–
–
ATmega128
0xB2
–
–
–
–
–
–
–
AT89551
0xE1
–
–
–
–
–
–
–
AT89552
0xE2
–
–
–
–
–
–
–
AT86RF401
0xD0
–
–
–
–
–
–
–
AVR061
2525B–AVR–04/03
AVR061
Signature Bytes
Table 41. Signature Bytes
Address
–
–
–
–
–
0x002
0x001
0x000
ATtiny11
–
–
–
–
–
0x05
0x90
0x1E
ATtiny12
–
–
–
–
–
0x05
0x90
0x1E
ATtiny15
–
–
–
–
–
0x06
0x90
0x1E
ATtiny22
–
–
–
–
–
0x06
0x91
0x1E
ATtiny26
–
–
–
–
–
0x09
0x91
0x1E
ATtiny28
–
–
–
–
–
0x07
0x91
0x1E
AT90S1200
–
–
–
–
–
0x01
0x90
0x1E
AT90S2313
–
–
–
–
–
0x01
0x91
0x1E
AT90S2323
–
–
–
–
–
0x02
0x91
0x1E
AT90S2333
–
–
–
–
–
0x05
0x91
0x1E
AT90S2343
–
–
–
–
–
0x03
0x91
0x1E
AT90S4414
–
–
–
–
–
0x01
0x92
0x1E
AT90S4433
–
–
–
–
–
0x03
0x92
0x1E
AT90S4434
–
–
–
–
–
0x02
0x92
0x1E
AT90S8515
–
–
–
–
–
0x01
0x93
0x1E
AT90S8535
–
–
–
–
–
0x03
0x93
0x1E
ATmega8
–
–
–
–
–
0x07
0x93
0x1E
ATmega8515
–
–
–
–
–
0x06
0x93
0x1E
ATmega8535
–
–
–
–
–
0x08
0x93
0x1E
ATmega161
–
–
–
–
–
0x01
0x94
0x1E
ATmega163
–
–
–
–
–
0x02
0x94
0x1E
ATmega16
–
–
–
–
–
0x03
0x94
0x1E
ATmega162
–
–
–
–
–
0x04
0x94
0x1E
ATmega169
–
–
–
–
–
0x05
0x94
0x1E
ATmega323
–
–
–
–
–
0x01
0x95
0x1E
ATmega32
–
–
–
–
–
0x02
0x95
0x1E
ATmega64
–
–
–
–
–
0x02
0x96
0x1E
ATmega103
–
–
–
–
–
0x01
0x97
0x1E
ATmega128
–
–
–
–
–
0x02
0x97
0x1E
AT89551
–
–
–
–
–
0x06
0x51
0x1E
AT89552
–
–
–
–
–
0x06
0x52
0x1E
AT86RF401
–
–
–
–
–
0x81
0x91
0x1E
23
2525B–AVR–04/03
Lock Bits
For explanation of the Lock bits, read the data sheet for the particular device. Unprogrammed bits should be set to “1”.
Table 42. Lock Bits
Lock Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ATtiny11
1
1
1
1
1
LB2
LB1
1
ATtiny12
1
1
1
1
1
LB2
LB1
1
ATtiny15
1
1
1
1
1
LB2
LB1
1
ATtiny22
1
1
1
1
1
LB2
LB1
1
ATtiny26
1
1
1
1
1
LB2
LB1
1
ATtiny28
1
1
1
1
1
LB2
LB1
1
AT90S1200
1
1
1
1
1
LB1
LB2
1
AT90S2313
1
1
1
1
1
LB1
LB2
1
AT90S2323
1
1
1
1
1
LB2
LB1
1
AT90S2333
1
1
1
1
1
LB2
LB1
1
AT90S2343
1
1
1
1
1
LB2
LB1
1
AT90S4414
1
1
1
1
1
LB2
LB1
1
AT90S4433
1
1
1
1
1
LB2
LB1
1
AT90S4434
1
1
1
1
1
LB2
LB1
1
AT90S8515
1
1
1
1
1
LB2
LB1
1
AT90S8535
1
1
1
1
1
LB2
LB1
1
ATmega8
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega8515
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega8535
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega161
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega163
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega16
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega162
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega169
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega323
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega32
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega64
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
ATmega103
1
1
1
1
1
LB2
LB1
1
ATmega128
1
1
BLB12
BLB11
BLB02
BLB01
LB2
LB1
1
LB2
LB1
1
(1)
–
(2)
–
AT89551
AT89552
AT86RF401
Notes:
24
1
1
1
1
1. See the AT89551 Data Sheet for more information.
2. See the AT89552 Data Sheet for more information.
AVR061
2525B–AVR–04/03
AVR061
Fuse Bits, Low Byte
For explanation of the Fuse bits, read the data sheet for the particular device. Unprogrammed bits should be set to “1”.
Table 43. Fuse Bits, Low Byte
Fuse Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ATtiny11
0
0
0
FSTRT
RSTDSBL
CKSEL2
CKSEL1
CKSEL0
ATtiny12
BODLVL
BODEN
SPIEN
RSTDSBL
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATtiny15
BODLVL
BODEN
SPIEN
RTDSBL
1
1
CKSEL1
CKSEL0
ATtiny22
1
1
SPIEN
1
1
1
1
RCEN
ATtiny26
PLLCK
CKOPT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATtiny28
1
1
1
INTCAP
CKSEL3
CKSEL2
CKSEL1
CKSEL0
AT90S1200
1
1
SPIEN
1
1
1
1
RCEN
AT90S2313
1
1
SPIEN
1
1
1
1
FSTRT
AT90S2323
1
1
SPIEN
1
1
1
1
FSTRT
AT90S2333
1
1
SPIEN
BODLVL
BODEN
CKSEL2
CKSEL1
CKSEL0
AT90S2343
1
1
SPIEN
1
1
1
1
RCEN
AT90S4414
1
1
SPIEN
1
1
1
1
FSTRT
AT90S4433
1
1
SPIEN
BODLVL
BODEN
CKSEL2
CKSEL1
CKSEL0
AT90S4434
1
1
SPIEN
1
1
1
1
FSTRT
AT90S8515
1
1
SIEN
1
1
1
1
FSTRT
AT90S8535
1
1
SPIEN
1
1
1
1
FSTRT
ATmega8
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega8515
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega8535
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega161
1
BOOTRST
SPIEN
BODLVL
BODEN
CKSEL2
CKSEL1
CKSEL0
ATmega163
BODLEV
BODEN
SPIEN
1
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega16
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega162
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega169
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega323
BODLEV
BODEN
1
1
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega32
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega64
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
ATmega103
1
1
SPIEN
1
EESAVE
1
SUT1
SUT0
ATmega128
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
AT89551
1
1
1
1
1
1
1
1
AT89552
1
1
1
1
1
1
1
1
AT86RF401
1
1
1
1
1
1
1
1
25
2525B–AVR–04/03
Fuse Bits, High Byte
For explanation of the Fuse bits, read the data sheet for the particular device. Unprogrammed bits should be set to “1”.
Table 44. Fuse Bits, High Byte
Fuse Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ATtiny11
1
1
1
1
1
1
1
1
ATtiny12
1
1
1
1
1
1
1
1
ATtiny15
1
1
1
1
1
1
1
1
ATtiny22
1
1
1
1
1
1
1
1
ATtiny26
1
1
1
RSTDISBL
SPIEN
EESAVE
DOBLEVEL
BODEN
ATtiny28
1
1
1
1
1
1
1
1
AT90S1200
1
1
1
1
1
1
1
1
AT90S2313
1
1
1
1
1
1
1
1
AT90S2323
1
1
1
1
1
1
1
1
AT90S2333
1
1
1
1
1
1
1
1
AT90S2343
1
1
1
1
1
1
1
1
AT90S4414
1
1
1
1
1
1
1
1
AT90S4433
1
1
1
1
1
1
1
1
AT90S4434
1
1
1
1
1
1
1
1
AT90S8515
1
1
1
1
1
1
1
1
AT90S8535
1
1
1
1
1
1
1
1
RSTDISBL
WDTON
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega8515
S8515C
WDTON
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega8535
S8535C
WDTON
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega161
1
1
1
1
1
1
1
1
ATmega163
1
1
1
1
1
BOOTSZ1
TOOTSZ0
BOOTRST
ATmega16
OCDEN
JTAGEN
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega162
OCDEN
JTAGEN
SPIEN
WDTON
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega169
OCDEN
JTAGEN
SPIEN
WDTON
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega323
OCDEN
JTAGEN
SPIEN
1
EESAVE
BOOTSZ1
TOOTSZ0
BOOTRST
ATmega32
OCDEN
JTAGEN
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSz0
BOOTRST
ATmega64
OCDEN
JTAGEN
SPIEN
CKOPT
ATmega103
1
1
1
1
1
1
1
1
ATmega128
OCDEN
JTAGEN
SPIEN
CKOPT
AT89551
1
1
1
1
1
1
1
1
AT89552
1
1
1
1
1
1
1
1
AT86RF401
1
1
1
1
1
1
1
1
ATmega8
26
AVR061
2525B–AVR–04/03
AVR061
Fuse Bits, Extended Byte
For explanation of the Fuse bits, read the data sheet for the particular device. Unprogrammed bits should be set to “1”.
Table 45. Fuse Bits, Extended Byte
Fuse Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ATtiny11
–
–
–
–
–
–
–
–
ATtiny12
–
–
–
–
–
–
–
–
ATtiny15
–
–
–
–
–
–
–
–
ATtiny22
–
–
–
–
–
–
–
–
ATtiny26
–
–
–
–
–
–
–
–
ATtiny28
–
–
–
–
–
–
–
–
AT90S1200
–
–
–
–
–
–
–
–
AT90S2313
–
–
–
–
–
–
–
–
AT90S2323
–
–
–
–
–
–
–
–
AT90S2333
–
–
–
–
–
–
–
–
AT90S2343
–
–
–
–
–
–
–
–
AT90S4414
–
–
–
–
–
–
–
–
AT90S4433
–
–
–
–
–
–
–
–
AT90S4434
–
–
–
–
–
–
–
–
AT90S8515
–
–
–
–
–
–
–
–
AT90S8535
–
–
–
–
–
–
–
–
ATmega8
–
–
–
–
–
–
–
–
ATmega8515
–
–
–
–
–
–
–
–
ATmega8535
–
–
–
–
–
–
–
–
ATmega161
–
–
–
–
–
–
–
–
ATmega163
–
–
–
–
–
–
–
–
ATmega16
–
–
–
–
–
–
–
–
ATmega162
1
1
1
M161C
BODLEVEL2
BODLEVEL1
BODLEVEL0
1
ATmega169
1
1
1
1
BODLEVEL2
BODLEVEL1
BODLEVEL0
RSTDISBL
ATmega323
–
–
–
–
–
–
–
–
ATmega32
–
–
–
–
–
–
–
–
ATmega64
1
1
1
1
1
1
M103C
WDTON
ATmega103
–
–
–
–
–
–
–
–
ATmega128
1
1
1
1
1
1
M103C
WDTON
AT89551
–
–
–
–
–
–
–
–
AT89552
–
–
–
–
–
–
–
–
AT86RF401
–
–
–
–
–
–
–
–
27
2525B–AVR–04/03
Devices Combining the
Fuse and Lock Bits on
Readback
Some devices combine readback of the the Fuse and Lock bits in the same command
and response. The proper command to use is the Cmnd_STK_READ_LOCK command.
The parts currently using this combined approach are:
•
AT90S1200
•
AT90S2313
•
AT90S2323
•
AT90S2343
•
AT90S4414
•
AT90S8515
•
AT90S4434
•
AT90S8535
•
ATtiny22
Check the pseudo-code in the following sections for comments on how to extract the
Fuse bits and Lock bits from the returned value.
Reading and Writing the
Fuse and Lock Bits in
Serial Mode
Writing and reading the Lock bits and Fuse bits in Serial mode is currently done using
the Cmnd_STK_UNIVERSAL command. This command requires that the ISP commands is properly formatted from the PC. These commans are not all of the simple kind.
The following pseudo-code sections illustrates how the Cmnd_STK_UNIVERSAL command may be used. The function:
UniversalCommand(UCHAR byte1, UCHAR byte2, UCHAR byte3, UCHAR *byte4)
is used in the pseudo-code. byte1 - byte4 should be set to contain the bitstream giving
the command and data. On return, byte4 will contain the last eight bit of the clocked-out
bitstream from the ISP interface. See the description of the Cmnd_STK_UNIVERSAL
command in earlier sections for more details.
Reading the Lock Bits
if (m_pDevice->ucLockBytes >= 1)
UniversalCommandNew(0x58, 0, 0, &data)
// Some parts combine Fuses and Locks in same byte on readback. To get the
// correct Lock bits from these parts, we need to mask away the bits that are
// not Lock bits. We also shift the Lock bits to the position described in the
// lock bits appendix section.
// Note: The same masking of the data must be done when reading the Lock bits
// in Parallell mode.
if (part does combine Fuse and Lock bits)
{
lock_byte = 0xff;
if (! (data & 0x80))
lock_byte &= 0xfd;
if (! (data & 0x40))
lock_byte &= 0xfb;
}
28
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2525B–AVR–04/03
AVR061
Writing the Lock Bits
if (number of lock bytes >= 1)
{
// Devices with selftimed SPI has another programming
// format for low lock bits than those without, apart from for ATtiny12 &
ATtiny15
if ((device supports self-timing programming) && (device is not Attiny12 or
Attiny15))
UniversalCommand(0xAC, 0xE0, 0, &lock_byte))
else
UniversalCommand(0xAC, lock_byte | 0xF9, 0, &dummy_var))
Sleep(50); // Wait for lock bit write operation in device to complete
}
Reading the Fuse Bits
// As mentioned, some parts combine Fuses and Locks in same byte on readback.
// They have another programming format than those which don't.
if (part does not combine fuse and lock bits)
{
if (number of fuse bytes >= 1)
UniversalCommandNew(0x50, 0, 0, &low_fuse_byte);
if (number of fuse bytes >= 2)
UniversalCommandNew(0x58, 0x08, 0, &high_fuse_byte);
}
// Common Fuse and Lock bits. This is exactly like reading Lock bits, execept
// that we pick another mask for getting the Fuse bits from the returned data.
// Note: The same masking of the data must be done when reading the Fuses
// in Parallell mode.
else if (part does combine fuse and lock bits)
{
if (number of lock bits are >= 1)
UniversalCommandNew(0x58, 0, 0, &low_fuse_byte);
low_fuse_byte |= 0xC0;// Set non-fuse bits to 1
}
29
2525B–AVR–04/03
Writing the Fuse Bits
if (number of fuse bytes >= 1)
{
// Devices with selftimed SPI have another Programming
// format for low fuses than those without
if (device supports self-timing programming)
UniversalCommand(0xAC, 0xA0, 0, &low_fuse_byte);
else
UniversalCommand(0xAC, (low_fuse_byte & 0x1F) | 0xA0, 0, &low_fuse_byte);
Sleep(50); // Wait for fuse write operation in device to complete
}
if (number of fuse bytes >= 2)
{
UniversalCommandNew(0xAC, 0xA8, 0, &high_fuse_byte);
Sleep(50); // Wait for fuse write operation in device to complete
}
30
AVR061
2525B–AVR–04/03
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