Datasheet

760
AT32UC3A
36.10 JTAG Data Registers
The following device specific registers can be selected as JTAG scan chain depending on the
instruction loaded in the JTAG Instruction Register. Additional registers exist, but are implicitly
described in the functional description of the relevant instructions.
36.10.1 Device Identification Register
The Device Identification Register contains a unique identifier for each product. The register is
selected by the IDCODE instruction, which is the default instruction after a JTAG reset.
36.10.1.1 Device specific ID codes
The different device configurations have different JTAG ID codes, as shown in Table 36-16.
Note that if the flash controller is statically reset, the ID code will be undefined
.
36.10.2 Reset register
The reset register is selected by the AVR_RESET instruction and contains one bit for each reset
domain in the device. Setting each bit to one will keep that domain reset until the bit is cleared.
MS
B
LSB
Bit 31 28 27 12 11 1 0
Device ID
Revision Part Number Manufacturer ID 1
4 bits 16 bits 11 bits 1 bit
Revision
This is a 4 bit number identifying the revision of the component.
Rev A = 0x0, B = 0x1, etc.
Part Number
The part number is a 16 bit code identifying the component.
Manufacturer ID
The Manufacturer ID is a 11 bit code identifying the manufacturer.
The JTAG manufacturer ID for ATMEL is 0x01F.
Table 36-16. Device and JTAG ID
Device name JTAG ID code (r is the revision number)
AT32UC3A0512 0xr1EDC03F
AT32UC3A0256 0xr1EDF03F
AT32UC3A0128 0xr1EE203F
AT32UC3A1512 0xr1EDD03F
AT32UC3A1256 0xr1EE003F
AT32UC3A1128 0xr1EE303F
LSB
Bit 4 3 2 1 0
Device ID
OCD APP RESERVED RESERVED CPU
32058K
AVR32-01/12