Register Quick Reference—IP2022 User’s Manual 422 www.ubicom.com C.3.15   STATUS Register 7 5 4 3 2 1 0 PA2:0 WD BO Z DC C Name Description PA2:0 Program memory page select bits. Used to extend the 13-bit
address encoded in jump and call instructions. Modified using
the page instruction. WD Watchdog time-out bit. Set at reset, if reset was triggered by
Watchdog Timer overflow, otherwise cleared. 0 =   Last reset was not caused by a Watchdog Timer           overflow.
1 =   Last reset was caused by a Watchdog Timer over- flow. BO Brown-out reset bit. Set at reset, if reset was triggered by
brown-out voltage level detection. 0 =   Last reset was not caused by the brown-out voltage           detector sensing a low-voltage condition.
1 =   Last reset was caused by the brown-out voltage detector sensing a low-voltage condition. Z Zero bit. Affected by most logical, arithmetic, and data move-
ment instructions. Set if the result was zero, otherwise cleared. 0 =   Result of last ALU operation was non-zero.
1 =   Result of last ALU operation was zero.