Cyclone® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683375
Date 10/18/2023
Document Table of Contents Control Register

Table 100.  Control Register Bits
Bit Name Reset Value22 Description
0 AnF 1'b0 Application not Factory bit. Indicates the configuration image type currently loaded in the device; 0 for factory image and 1 for application image. When this bit is 1, the access to the control register is limited to read only and the watchdog timer is enabled.

Factory configuration design must set this bit to 1 before triggering reconfiguration using an application configuration image.

1..24 PGM[0..23] 24'h000000 Upper 24 bits of AS configuration start address (StAdd[31..8]), the 8 LSB are zero.
25 Wd_en 1'b0 User watchdog timer enable bit. Set this bit to 1 to enable the watchdog timer.
26..37 Wd_timer[11..0] 12'b000000000000 User watchdog time-out value.
22 This is the default value after the device exits POR and during reconfiguration back to the factory configuration image.