Low level TAP commands (JTAG only).

The TAP command shifts N bits of DATA into the specified shift register (IR or DR). The output of the shift is captured and returned in the DATA response. Bits are shifted LSB first both in and out.

Table 1. TAP Command Format
Field Size Description
AVR32_CMD_TAP 1 byte Command ID
Version (0x00) 1 byte Command version
Register/Signal 1 byte



Bits 1 byte Number of bits to shift
Data N bytes N = bits/8; data to scan in