TMP92CZ26A

92CZ26A-574

3.21 Real time clock (RTC)

3.21.1 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

3.21.2 Block diagram

Figure 3.21.1 RTC blo c k diagram
Note1: The Christian era year colu mn:
This product has year column toward only lower two columns. Therefore the next year
in 99 works as 00 years. In system to use it, please manage upper two columns with
the system side when ha ndle year column in the Christian era.
Note2: Leap year:
A leap year is the year, which is divisible with 4, but the year , which there is exception,
and is divisible with 100, i s not a leap year. However , the year is divisible with 400, is a
leap year. But there is not this product for the corresponden ce to the above except ion.
Because there are only with the year that is divisibl e with 4 as a leap year , please cop e
with the system side if this function is problem.
32 KHz
Clock Divider
Comparator
Alarm Register
R/W Control
Carry hold
(
1s
)
A
ddress
Bus
Clock
Alarm
Selector
ALARM
INTRTC
16 Hz Clock
1 Hz Clock
ALARM
Internal data bus
AddressD0~D7 WR RD
Adjust