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RX
8564 LC
12.2. Register table
Function
Address [h]
00
Control 1
01
Control 2
02
Seconds
03
Minutes
04
Hours
05
Days
06
Weekdays
07
Months / Century
08
Years
09
Minute Alarm
0A
Hour Alarm
0B
Day Alarm
0C
Weekday Alarm
0D
CLKOUT frequency
0E
Timer control
0F
Timer
Note)
During the initial power-on (from 0 V) and if the value of the VL bit is "1" when the VL bit is read, be sure to
initialize all registers before using them.
When doing this, be careful to avoid setting incorrect data as the date or time, as timed operations cannot be
guaranteed if incorrect date or time data has been set.
During the initial power-on (from 0 V), the power-on reset function sets "1" to the VL bit.
1.
Since the value of other registers is undefined at this time, be sure to reset all registers before using them.
During the initial power-on (from 0 V), the power-on reset function sets "1" to the FE bit and the FD1 and FD0 bits
2.
are reset to "0".
If the CLKOE input pin is at high level ("H"), output from the CLKOUT output pin is at 32.768 kHz.
3.
The two TEST bits for address 00 (Control 1) are for use by Seiko Epson Corporation.
When initializing, be sure to write "0". Afterward, be sure to write "0" whenever writing to these bits.
This device's operations are not guaranteed if "1" has been set to any of these bits.
All bits marked with "0" should have a value of "0" after initialization.
4.
All bits marked with "x" are read-only bits whose value when read is undefined. Be sure to mask these bits after
5.
they are read.
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
TEST
0
STOP
0
0
0
TI / TP
VL
40
20
10
40
20
10
20
10
20
10
C
10
80
40
20
10
AE
40
20
10
AE
20
10
AE
20
10
AE
FE
TE
128
64
32
16
Page
11
TEST
0
0
0
AF
TF
AIE
TIE
8
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
4
2
1
FD1
FD0
TD1
TD0
8
4
2
1
note
3 , 4
4 , 5
1
5
5
5
5
5
5
5
5
2 , 5
5
ETM12E-01
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