TMP92CF30
2009-06-12
92CF30-497
3.20 Real time clock (RTC)
3.20.1 Function description for RTC
1)
Clock function (hour, minute, second)
2)
Calendar function (month and day, day of the week, and leap year)
3)
24 or 12-hour (AM/PM) clock function
4)
+/- 30 second adjustment function (by software)
5)
Alarm function (Alarm output)
6)
Alarm interrupt generate
3.20.2 Block diagram
Figure 3.20.1 RTC block diagram
Note 1: Western calendar year column:
This product uses only the final two digits of the year. Therefore, the year following 99 is 00 years. In use,
please take into account the first two digits when handling years in the western calendar.
Note 2: Leap year:
A leap year is divisible by 4, but the exception is any leap year which is divisible by 100; this is not considered
a leap year. However, any year which is divisible by 400, is a leap year. This product does not take into
account the above exceptions . Since this product accounts only for leap years divisible by 4, please adjust the
system for any problems.
32 kHz
Clock
Divider
Comparator
Alarm Register
R/W Control
Carry hold
(1s)
Address
Bus
Clock
Alarm
Selector
ALARM
INTRTC
16 Hz Clock
1 Hz Clock
ALARM
Internal data bus
Address
D0~D7
WR
RD
Adjust
Summary of Contents for TLCS-900/H1 Series
Page 652: ...TMP92CF30 2009 06 12 92CF30 650 ...