Generate JTAG sequence TMS,TDI and capture TDO.
The DAP_JTAG_Sequence Command can be used to detect JTAG devices.
DAP_JTAG_Sequence Command:
BYTE | BYTE **********| BYTE *********| BYTE ****|
> 0x14 | Sequence Count | Sequence Info | TDI Data |
******|****************|
DAP_JTAG_Sequence Respons:
BYTE | BYTE **| BYTE ****|
< 0x14 | Status |TDO Data |
******|********|++++++++++|
- Sequence Count: Number of Sequences
- Sequence Info: Contains number of TDI bits and fixed TMS value
- Bit 5..0: Number of TCK cycles: 1 .. 64 (64 encoded as 0)
- Bit 6: TMS value
- Bit 7: TDO Capture
- TDI Data: Data generated on TDI
- One bit for each TCK cycle
- LSB transmitted first, padded to BYTE boundary
- TDO Data: Data captured from TDO
- One bit for each TCK cycle when TDO Capture is enabled
- LSB received first, padded to BYTE boundary
- Status: Response Status