Specifications

Control Register
Table 7-7: Control Register Bits
DescriptionReset
Value
(16)
NameBit
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'b0
AnF0
Upper 24 bits of AS configuration start address
(StAdd[31..8]), the 8 LSB are zero.
24'h000000
PGM[0..23]1..24
User watchdog timer enable bit. Set this bit to
1 to enable the watchdog timer.
1'b0
Wd_en25
User watchdog time-out value.12'b000000000000
Wd_timer[11..0]26..37
Status Register
Table 7-8: Status Register Bits
DescriptionReset
Value
(17)
NameBit
When set to 1, indicates CRC error during application
configuration.
1'b0
CRC0
When set to 1, indicates that nSTATUS is asserted by
an external device due to error.
1'b0
nSTATUS1
When set to 1, indicates that reconfiguration has been
triggered by the logic array of the device.
1'b0
Core_nCONFIG2
When set to 1, indicates that nCONFIG is asserted.
1'b0
nCONFIG3
When set to 1, indicates that the user watchdog
time-out.
1'b0
Wd4
Remote System Upgrade State Machine
The operation of the remote system upgrade state machine is as follows:
(16)
This is the default value after the device exits POR and during reconfiguration back to the factory configuration
image.
(17)
After the device exits POR and power-up, the status register content is 5'b00000.
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
Altera Corporation
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CV-52007
Control Register
7-32
2013.06.11