BOOT_MODE_POR (CRL_APB) Register

Zynq UltraScale+ Devices Register Reference (UG1087)

Document ID
UG1087
Release Date
2024-03-13
Revision
1.10

BOOT_MODE_POR (CRL_APB) Register Description

Register NameBOOT_MODE_POR
Offset Address0x0000000204
Absolute Address 0x00FF5E0204 (CRL_APB)
Width16
TypemixedMixed types. See bit-field details.
Reset Value0x00000000
DescriptionHardware controlled BOOT MODE register.

Bit field values are loaded after a POR (internal or PS_POR_B) and cannot change until another POR. The bit fields are triplicated for security. For each field: Captured value of BOOT MODE pins after a POR reset. Since the initial value is defined from the pins, the reset value is listed as 'X.'Register is reset only by a POR reset.

BOOT_MODE_POR (CRL_APB) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
Reserved15:12rwNormal read/write0x0reserved
boot_mode211:8roRead-only0Set 3
boot_mode1 7:4roRead-only0Set 2
boot_mode0 3:0roRead-only0Set 1