The TAP instructions supported by the Versal ACAP are listed in the following table.
| Instruction Name | Binary Code [5:0] 1 | Hex Code | Description |
|---|---|---|---|
| AUTH_JTAG |
110101
|
35h | Authenticated JTAG can enable the JTAG interface |
| BYPASS |
111111
|
3Fh | Enables BYPASS instruction |
| DPC |
110110
|
36h | Accesses the debug packet controller |
| ERROR_STATUS |
111110
|
3Eh | Accesses the error management status register |
| EXTEST |
100110
|
26h | Enables the boundary-scan EXTEST instruction |
| EXTEST_PULSE |
111100
|
3Ch | Enables the IEEE Std 1149.6 functions in the GTs for testing AC-coupled connections between GTs |
| EXTEST_TRAIN |
111101
|
3Dh | Enables the IEEE Std 1149.6 functions in the GTs for testing AC-coupled connections between GTs |
| HIGHZ_IO |
001010
|
0Ah | 3-stated user I/O pins but not GTs while enabling the bypass register |
| IDCODE |
001001
|
09h | ID Code; accesses the device IDCODE |
| EXTENDED_IDCODE |
011001
|
19h | ID code extended; used with IDCODE for device extended identification |
| JCONFIG |
000101
|
05h | Accesses the SBI for boot and configuration of the Versal ACAP via JTAG (JCONFIG) |
| JRDBK |
000100
|
04h | JTAG configuration; accesses the SBI for readback via JTAG |
| JSTATUS |
011111
|
1Fh | JTAG status: access to the device JTAG status register value |
| READ_DNA |
110010
|
32h | Accesses the Versal ACAP unique device DNA value |
| SAMPLE/PRELOAD |
000001
|
01h | Enables boundary-scan SAMPLE/PRELOAD instruction |
| SYS_RST |
110111
|
37h | Resets the Versal ACAP with PMC_SRST |
| USER1 |
000010
|
02h | Access to the user-defined register 1 |
| USER2 |
000011
|
03h | Access to the user-defined register 2 |
| USER3 |
100010
|
22h | Access to the user-defined register 3 |
| USER4 |
100011
|
23h | Access to the user-defined register 4 |
| USERCODE |
001000
|
08h | Access to the user designated value |
|
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