參數(shù)資料
型號(hào)： S-3531A
廠商： Seiko Instruments Inc.
英文描述： CMOS Real-Time Clock IC Supporting an IIC-Bus(支持IIC-BUS的CMOS實(shí)時(shí)時(shí)鐘芯片)
中文描述： CMOS實(shí)時(shí)時(shí)鐘IC支持一個(gè)IIC總線（支持IIC總線的實(shí)時(shí)時(shí)鐘芯片的CMOS）
文件頁(yè)數(shù)： 9/31頁(yè)
文件大小： 185K
代理商： S-3531A
REAL-TIME CLOCK
S-3531A
8
Seiko Instruments Inc.
2-1. Real-time data register
The real-time data register is a fifty-six-bit register which stores the BCD code of the data of year, month, day,
day of week, hour, minute and second. Any read/write operation performed by the real-time data access
command sends or receives the data from LSB on the first digit of the year data.
AM/
PM
MSB
Y80 Y40 Y20 Y10 Y8
Y4
Y2
Y1
MSB
LSB
Year data (00 to 99)
0
0
0
M10 M8
M4
M2
M1
MSB
LSB
Month data (01 to 12)
0
0
D20 D10 D8
D4
D2
D1
MSB
LSB
Day data (01 to 31)
0
0
0
0
0
W4
W2
W1
MSB
LSB
Day of week data (00 to 06)
A septenary counter. Set it so that it corresponds to the
day of the week.
0
H20 H10 H8
H4
H2
H1
LSB
Hour data (00 to 23 or 00 to 11)
0
MSB
LSB
Minute data (00 to 59)
TE
ST
S40 S20 S10 S8
S4
S2
S1
MSB
LSB
Second data (00 to 59) and test flag
m10
m8
m4
m2
m1
AM/PM :For 12-hour expression, 0:AM and 1:PM.
For 24-hour expression, this flag has no
meaning but either 0 or 1 must be written.
Sets the lower two digits of the Christian era (00 to 99)
and links together with the auto calender feature till
2,099.
The count value is automatically changed by the auto
calender feature:
1, 3, 5, 7, 8, 10, 12: 1 to 31
4, 6, 9, 11: 1 to 30
2 (leap year): 1 to 29
2 (common year): 1 to 28
TEST : Turns to “1” during the test mode.
Figure 9
Real-time data register
m20
m40
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