JTAG_STATUS Register - JTAG_STATUS Register - UG860

Spartan UltraScale+ FPGAs Configuration User Guide (UG860)

Document_ID
UG860
Release_Date
2026-07-27
Revision
v1.3 English

The JTAG_STATUS register indicates the value of global signals and select dedicated configuration status pins and signals. A detailed explanation of each bit position is given in the following table.

Table 1. JTAG_STATUS Register Description
Name Bit Index Description
RSVD READS 0 47 Reserved reads 0
INIT_COMPLETE 46 Device initialization complete
DCI_LOCK 45 DCI lock status
PLL_LOCK 44 PLL/DDRMC lock status
EOS 43 End of Startup
GWE 42 Global write enable
GTS CFG 41 Global tri-state
GHIGH 40 Global GHIGH
RESERVED 39:37 Reserved
PUDC_B 36 Value on the PUDC_B pin.
RESERVED 35 Reserved
DONE 34 Value on the DONE_PIN pin. A value of 1 on DONE indicates boot and configuration is complete.
JRDBK ERROR 33 JTAG readback status indicator. A value of 1 on JRDBK indicates an error reading data from the slave boot interface (SBI).
JCONFIG ERROR 32 JTAG data load error indicator. A value of 1 indicates the SBI is not ready to accept data.
PMC VERSION 31:28 PMC version
RESERVED 27:24 Reserved
JTAG SEC GATE 23 Security gate status.
RESERVED 22 Reserved
PMC SCAN CLEAR DONE 21 Scan clear done indicator. A value of 1 indicates the scan clear is complete.
PMC SCAN CLEAR PASS 20 Scan clear pass indication. A value of 1 means the scan clear passed.
CRP JTAG STATUS 19:17 Clock and reset status. A value of 3'b111 indicates the device is still held in POR reset.
RESERVED 16:15 Reserved
BOOT MODE 14:12 Value on the M[2:0] mode pins at release of PROGRAM_B.
RESERVED 11:8 Reserved
AES KEY ZEROIZED 7 AES key zeroized indicator. A value of 1 indicates all keys are zeroized.
RESERVED 6 Reserved
SELECTMAP BUS WIDTH 5:4 SelectMAP configuration mode bus width detected.
  • 00 = No bus width detected
  • 01 = SelectMAP 8-bit
  • 10 = SelectMAP 16-bit
  • 11 = SelectMAP 32-bit
SBI JTAG ENABLED 3 SBI JTAG indicator. A value of 1 indicates the SBI is configured to receive data from the JTAG interface.
SBI JTAG BUSY 2 SBI JTAG busy indicator. A value of 1 indicates the SBI is busy and cannot accept data when in JTAG mode.
RSVD READS 0 1 Reserved reads 0
RSVD READS 1 0 Reserved reads 1