RX8804CE
Page - 10
ETM59E-05
3) MONTH register
This MONTH register counts from 01 (January), 02 (February), and up to 12 (December), then starts again
since 01 (January).
4) YEAR register
This YEAR register counts from 00, 01, 02 and up to 99, then starts again since 00.
Any year multiple of four (04, 08, 12, 88, 92, 96, etc.) works as a leap year.
< Definition of leap years >
Leap year: year divisible by 4, year divisible by 400
Ex. 2000, 2004, 2008, 2012, 2096, 2400, 2800
Common year: year indivisible by 4, year divisible by 100
Ex. 2001, 2002, 2003, 2005, 2099, 2100, 2200, 2300, 2500
Figure 6 Internal clock distribution diagram
8.2.2. Alarm Registers
Table 16 Alarm registers
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
08
MIN Alarm
AE
40
20
10
8
4
2
1
09
HOUR Alarm
AE
•
20
10
8
4
2
1
0A
WEEK Alarm
AE
6
5
4
3
2
1
0
DAY Alarm
•
20
10
8
4
2
1
0D
Control1
TEST
WADA
USEL
TE
FSEL1
FSEL0
TSEL1
TSEL0
0E
Flag Register
UF
TF
AF
VLF
VDET
0F
Control2
CSEL1
CSEL0
UIE
TIE
AIE
RESET
The alarm interrupt function is used, along with the AEI, AF, and WADA bits, to set alarms for specified date,
day, hour, and minute values
When the settings in the above alarm registers and the WADA bit match the current time, the /INT pin goes to
low level and
“1” is set to the AF bit to report that an alarm interruption has occurred
Please refer to Alarm Interrupt Function
Sec counter
Min counter
Hour counter
Day counter
Month counter
Year counter
Week
counter
32.768 kHz
crystal
C1 C2 C3 C4,,, Cn
Capacitors Array Selection
Parabolic Compensation
Temperature Sensor
Temp. Sense period selection
0.5 sec, 2 sec, 10 sec, 30 sec
32.768 kHz
1/2 divider chain 16384 Hz, 8192 Hz,,, 1024Hz, 2Hz,
4Hz
1Hz
FOUT
selector
FOUT
Reset
3kinds of reset are available
1.RESET bit is set to 1.
2.SEC register(00h) is reset to 0.
3.Power on Reset