參數(shù)資料
型號(hào)： S-35180AT8T1
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： REAL TIME CLOCK, PDSO8
封裝： TSSOP-8
文件頁(yè)數(shù)： 46/46頁(yè)
文件大小： 498K
代理商： S-35180AT8T1
3-WIRE REAL-TIME CLOCK
Rev.2.0_00
S-35180A
Seiko Instruments Inc.
9
Operation
1. Communication data configuration
After making the CS pin “H”, transmit the 4-bit fixed code “0110” and then transmit a 3-bit command
followed by a 1-bit read/write command. Refer to “Serial Interface”.
Command
0
1
0
C2
C1
C0
R/W
Fixed code
MSB
LSB
Read/write bit
Figure 9 Communication Data
2. Command configuration
There are eight types of commands that read from and write to various registers. The table below lists
these commands.
Table 9 Command List
Command
Data
C2 C1 C0
Description
B7
B6
B5
B4
B3
B2
B1
B0
0
Status register_1 access
POC
*4
BLD
*4
INT2
*3 INT1 *3 SC1 *2 SC0 *2
RESET
*1
0
1
Status register_2 access
TEST
*5 INT2AE SC *7
SC
*7
32kE INT1AE INT1ME INT1FE
0
1
0
Real-time data 1 access
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
(year data to)
*6
*6
*6
M10
M8
M4
M2
M1
*6
*6
D20
D10
D8
D4
D2
D1
*6
*6
*6
*6
*6
W4
W2
W1
*6
AM/PM
H20
H10
H8
H4
H2
H1
*6
m40
m20
m10
m8
m4
m2
m1
*6
s40
s20
s10
s8
s4
s2
s1
0
1
Real-time data 2 access
*6
AM/PM
H20
H10
H8
H4
H2
H1
(hour data to)
*6
m40
m20
m10
m8
m4
m2
m1
*6
s40
s20
s10
s8
s4
s2
s1
1
0
INT1 register_1 access (alarm time 1) A1WE
*6
*6
*6
*6
W4
W2
W1
(INT1AE
= 1, INT1ME = 0, INT1FE =
0)
A1HE
AM/PM
H20
H10
H8
H4
H2
H1
A1mE
m40
m20
m10
m8
m4
m2
m1
INT1 register_1 access (frequency
duty setting)
(INT1ME
= 0, INT1FE = 1)
SC
*7
SC
*7
SC
*7
16 Hz
8 Hz
4 Hz
2 Hz
1 Hz
1
0
1
INT1 register_2 access (alarm time 2) A2WE
*6
*6
*6
*6
W4
W2
W1
(INT2AE
= 1)
A2HE
AM/PM
H20
H10
H8
H4
H2
H1
A2mE
m40
m20
m10
m8
m4
m2
m1
1
0
Clock adjustment register access
V7
V6
V5
V4
V3
V2
V1
V0
1
Free register access
F7
F6
F5
F4
F3
F2
F1
F0
*1.
Write-only flag. By writing “1” to this register, the IC is reset.
*2.
Scratch bit. R/W-enabled register that can be freely used by users.
*3.
Read-only flag. It is cleared when read. It is valid only when the alarm is set.
*4.
Read-only flag. “POC” is set to “1” when power is applied. It is cleared when read. For the “BLD”, refer
to “Power Supply Voltage Detector.”
*5.
For IC testing. Normally set this register to “0”.
*6.
No effect by writing. It is “0” when read.
*7.
This is a R/W-enabled register that does not affect interrupts.
12/24
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