Specifications

CY14B256K
Document Number: 001-06431 Rev. *G Page 12 of 24
0x7FF6
Interrupt Status/Control
D7 D6 D5 D4 D3 D2 D1 D0
WIE AIE PFIE 0 H/L P/L 00
WIE Watchdog Interrupt Enable. When set to ‘1’ and a watchdog time out occurs, the watchdog timer drives the INT pin
and the WDF flag. When set to ‘0’, the watchdog time out affects only the WDF flag.
AIE Alarm Interrupt Enable. When set to ‘1’, the alarm match drives the INT pin and the AF flag. When set to ‘0’, the
alarm match only affects the AF flag.
PFIE Power Fail Enable. When set to ‘1’, the alarm match drives the INT pin and the PF flag. When set to ‘0’, the power
fail monitor affects only the PF flag.
H/L
High/Low. When set to a ‘1’, the INT pin is driven active HIGH. When set to ‘0’, the INT pin is open drain, active LOW.
P/L
Pulse/Level. When set to a ‘1’, the INT pin is driven active (determined by H/L) by an interrupt source for approxi-
mately 200 ms. When set to a ‘0’, the INT pin is driven to an active level (as set by H/L) until the Flags or Control
register is read.
0x7FF5
Alarm - Day
D7 D6 D5 D4 D3 D2 D1 D0
M
0 10s Alarm Date Alarm Date
Contains the alarm value for the date of the month and the mask bit to select or deselect the date value.
M
Match. Setting this bit to ‘0’ causes the date value to be used in the alarm match. Setting this bit to ‘1’ causes the
match circuit to ignore the date value.
0x7FF4
Alarm - Hours
D7 D6 D5 D4 D3 D2 D1 D0
M
0 10s Alarm Hours Alarm Hours
Contains the alarm value for the hours and the mask bit to select or deselect the hours value.
M
Match. Setting this bit to ‘0’ causes the hours value to be used in the alarm match. Setting this bit to ‘1’ causes the
match circuit to ignore the hours value.
0x7FF3
Alarm - Minutes
D7 D6 D5 D4 D3 D2 D1 D0
M
0 10s Alarm Minutes Alarm Minutes
Contains the alarm value for the minutes and the mask bit to select or deselect the minutes value.
M
Match. Setting this bit to ‘0’ causes the minutes value to be used in the alarm match. Setting this bit to ‘1’ causes
the match circuit to ignore the minutes value.
0x7FF2
Alarm - Seconds
D7 D6 D5 D4 D3 D2 D1 D0
M
0 10s Alarm Seconds Alarm Seconds
Contains the alarm value for the seconds and the mask bit to select or deselect the seconds value.
M
Match. Setting this bit to ‘0’ causes the seconds value to be used in the alarm match. Setting this bit to ‘1’ causes
the match circuit to ignore the seconds value.
0x7FF1
Time Keeping - Centuries
D7 D6 D5 D4 D3 D2 D1 D0
0 0 10s Centuries Centuries
Table 4. Register Map Detail (continued)
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