MEC1322 Datasheet, PDF (238/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
TABLE 19-8:
RS (hex)
7
8
9
A
B
C
D
E
F
REGISTER A FIELD RS: PERIODIC INTERRUPT SETTINGS (CONTINUED)
Interrupt Period
1.953125 ms
3.90625 ms
7.8125 ms
15.625 ms
31.25 ms
62.5 ms
125 ms
250 ms
500 ms
19.11.12 REGISTER B
Offset ^0Bh
Bits
Description
7 UPDATE_CYCLE_INHIBIT
In its default state ‘0’, this bit allows hardware updates to the Time
and Date registers, which occur at 1-second intervals. A ‘1’ written to
this field inhibits updates, allowing these registers to be cleanly writ-
ten to different values. Writing ‘0’ to this bit allows updates to con-
tinue.
6 PERIODIC_INTERRUPT_ENABLE
Type
R/W
R/W
1=Alows the Periodic Interrupt events to be propagated as interrupts
0=Periodic events are not propagates as interrupts
5 ALARM_INTERRUPT_ENABLE
R/W
1=Alows the Alarm Interrupt events to be propagated as interrupts
0=Alarm events are not propagates as interrupts
4 UPDATE_ENDED_INTERRUPT_ENABLE
R/W
1=Alows the Update Ended Interrupt events to be propagated as inter-
rupts
0=Update Ended events are not propagates as interrupts
3 Reserved
R
2 DATA_MODE
R/W
1=Binary Mode for Dates and Times
0=BCD Mode for Dates and Times
1 HOUR_FORMAT_24_12
R/W
1=24-Hour Format for Hours and Hours Alarm registers. 24-Hour for-
mat keeps the AM/PM bit off, with value range 0--23
0=12-Hour Format for Hours and Hours Alarm registers. 12-Hour for-
mat has an AM/PM bit, and value range 1--12
Default
0b
Reset
Event
RTC_R
ST
0b
RTC_R
ST
0b
RTC_R
ST
0b
RTC_R
ST
-
-
0b
RTC_R
ST
0b
RTC_R
ST
DS00001719D-page 238
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