14. Functions
RX8130CE
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ETM50E-07
Seiko Epson Corporation
24
14. Functions
Figure 16 Basic (32.768 k Hz oscillation, counter, FOUT) Function
14.1. Clock calendar explanation
At the time of a communication start, the Clock & Calendar data are fixed (hold the carry operation), and it is
automatically revised at the time of the communication end. Therefore, it recommends that the access to a
clock calendar has continuous access by the auto increment function.
Table 14 Time, calendar setting example (Sun, 29-Feb-88 17:39:45 (leap year)
Address
h
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
10
SEC
0
1
0
0
0
1
0
1
11
MIN
0
0
1
1
1
0
0
1
12
HOUR
0
0
0
1
0
1
1
1
13
WEEK
0
0
0
0
0
0
0
1
14
DAY
0
0
1
0
1
0
0
1
15
MONTH
0
0
0
0
0
0
1
0
16
YEAR
1
0
0
0
1
0
0
0
Note with caution that writing non-existent time data may interfere with normal operation of the clock counter.
14.1.1. Clock counter
1) [
SEC
]
[
MIN
]
register
These registers are 60-base BCD counters. These registers are incremented at the timing when carry is
generated from a lower register. At the timing when the lower register changes from 59 to 00, carry
is generated to the higher register and thus incremented.
When writing is performed to [SEC] register, Internal-count-down-chain less than one second
(
512
Hz
1
Hz
)
is cleared to 0.
2) [
HOUR
]
register
This register is a 24-base BCD counter (24-hour format).These registers are incremented at the timing
when carry is generated from a lower register.
