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)： 13/31頁(yè)
文件大?。?/td> 185K
代理商： S-3531A
REAL-TIME CLOCK
S-3531A
12
Seiko Instruments Inc.
4. Processing of none-existent data and end-of-month
When writing real-time data, validate it and treat any invalid data and end-of-month correction.
[None-existent data processing]
Table 3 None-existent data processing
[End-of-month correction]
Any none-existent day is corrected to the first day of the next month. For example, February 30 is changed to March 1.
Leap-year correction is also performed here.
Register
Normal data
Error data
Result
Year data
00 to 99
XA to XF, AX to FX
00
Month data
01 to 12
00, 13 to 19, XA to XF
01
Day data
01 to 31
00, 32 to 39, XA to XF
01
Day of week data
0 to 6
7
0
Hour data (24-hour)
(*) (12-hour)
0 to 23
0 to 11
24 to 29, 3X, XA to XF
12 to 19, XA to XF
00
00
Minute data
00 to 59
60 to 79, XA to XF
00
Second data (**)
00 to 59
60 to 79, XA to XF
00
Figure 14 Initializing
0
1 1
0
DEVICE
ADDRES
R
/
W
M
S
B
SDA LINE
0 0
1
A
C
K
L
S
B
1
command
status access command
VDD
POWER
flag
0
1 1
0
DEVICE
ADDRES
R
/
W
M
S
B
SDA
0 0
1
A
C
K
L
S
B
1
command
status access command
VDD
POWER
flag
0
1 1
0
DEVICE
ADDRES
R
/
W
M
S
B
0 0
A
C
K
L
S
B
command
1
0
1 0
0 0 0
A
C
K
S
T
O
P
S
T
A
R
T
0
POWER flag
0
Don't care
backup state (S-3531A does not reach any indefinite area)
S
T
A
R
T
0
1 1
0
R
/
W
M
S
B
0 1
A
C
K
L
S
B
0
0
0 0
0 0 0
A
C
K
S
T
O
P
0
POWER flag
0
S
T
A
R
T
S
T
A
R
T
S
T
O
P
S
T
O
P
real-time data access command
CPU down
reset command
status data
1
status data
DEVICE
ADDRES
command
1
(*)
For 12-hour expression, write the AM/PM flag.
The AM/PM flag is ignored in 24-hour expression, but "0" for 0 to 11 o'clock and "1"
for 12 to 23 o'clock are read in a read operation.
None-existent data processing for second data is performed by a carry pulse one
second after the end of writing. At this point, the carry pulse is sent to the minute
(**)
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