Boot History Status Register (10110) - Boot History Status Register (10110)

Boot History Status Register (10110) - Boot History Status Register (10110) - UG570

UltraScale Architecture Configuration User Guide (UG570)

Document ID

UG570

Release Date

2025-03-04

Revision

1.20.1 English

The boot history status register (BOOTSTS) can only be reset by POR, asserting PROGRAM_B, or issuing a JPROGRAM instruction. At EOS or an error condition, status (_0) is shifted to status (_1), and status (_0) is updated with the current status. The name of each bit position in the BOOTSTS register is given in the following table and described in the subsequent table.

Table 1. BOOTSTS Register
Description	Reserved																	WRAP_ERROR_1	CRC_ERROR_1	ID_ERROR_1	WATCHDOG_TIMEOUT_ERROR_1	INTERNAL_PROG_1	FALLBACK_1	STATUS_VALID_1	Reserved	WRAP_ERROR_0	CRC_ERROR_0	ID_ERROR_0	WATCHDOG_TIMEOUT_ERROR_0	INTERNAL_PROG_0	FALLBACK_0	STATUS_VALID_0
Bit Index	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Value	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Table 2. BOOTSTS Register Description
Name	Bit Index	Description
WRAP_ERROR_1	14	BPI address counter wraparound error, supported in asynchronous read mode.
CRC_ERROR_1	13	CRC error.
ID_ERROR_1	12	IDCODE error.
WATCHDOG_TIMEOUT_ERROR_1	11	Watchdog time-out error.
INTERNAL_PROG_1	10	Internal PROG triggered configuration.
FALLBACK_1	9	`1`: Fall back to default reconfiguration, RS[1:0] actively drives `2'b00` `0`: Normal configuration
STATUS_VALID_1	8	Status 1 is valid.
WRAP_ERROR_0	6	BPI address counter wraparound error, supported in asynchronous read mode
CRC_ERROR_0	5	CRC error.
ID_ERROR_0	4	IDCODE error.
WATCHDOG_TIMEOUT_ERROR_0	3	Watchdog time-out error.
INTERNAL_PROG_0	2	Internal PROG triggered configuration.
FALLBACK_0	1	`1`: Fall back to default reconfiguration, RS[1:0] actively drives `2'b00` `0`: Normal configuration
STATUS_VALID_0	0	Status 0 is valid.
The default power-up state for all fields in the BOOTSTS register is `0`, indicating no error, fallback, or valid configuration detected. After configuration, a `1` in any bit indicates an error case, fallback, or completed configuration has been detected.