3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
2. Configuration of command
8 types of command are available for the S-35190A, The S-35190A does Read/Write the various registers by inputting
these fixed codes and commands. The S-35190A does not perform any operation with any codes and commands other
than those below.
Table 9 List of Command
Fixed
Code
Command
Description
Status register 1 access
Status register 2 access
Data
C2 C1 C0
B7
RESET
B6
B5
B4
B3
B2
B1
B0
SC0*2 SC1*2 INT1*3 INT2*3 BLD*4 POC*4
*1
0
0
0
0
0
1
12/24
INT1FE INT1ME INT1AE 32kE SC2*2 SC3*2 INT2AE TEST*5
Y40
Y1
M1
D1
W1
H1
m1
s1
H1
m1
s1
Y2
M2
D2
W2
H2
m2
s2
H2
m2
s2
Y4
M4
D4
W4
H4
m4
s4
H4
m4
s4
Y8
M8
D8
Y10
M10
D10
Y20
Y80
*6
*6
*6
−
−
−
*6
*6
−
−
D20
−
−
−
−
Real-time data 1 access
(year data to)
*6
*6
*6
*6
*6
0
0
1
1
1
1
0
0
0
1
0
1
−
−
−
*6
H8
m8
s8
H8
m8
s8
H10
m10
s10
H10
m10
s10
H20
m20
s20
H20
m20
s20
AM/PM
m40
s40
AM/PM
m40
s40
*6
*6
−
*6
−
−
Real-time data 2 access
(hour data to)
*6
*6
−
0110
INT register 1 access
*6
*6
*6
*6
−
W1
H1
m1
W2
H2
m2
W4
H4
m4
−
−
−
A1WE
A1HE
A1mE
(alarm time 1: week/hour/minute)
(INT1AE = 1, INT1ME = 0,
INT1FE = 0)
H8
m8
H10
m10
H20
m20
AM/PM
m40
INT register 1 access
(output of user-set frequency)
(INT1ME = 0, INT1FE = 1)
INT register 2 access
(alarm time 2: week/hour/minute)
(INT2AE = 1)
1 Hz
2 Hz
4 Hz
8 Hz
16 Hz SC4 *2 SC5 *2 SC6 *2
*6
*6
*6
*6
−
W1
H1
m1
V0
F0
W2
H2
m2
V1
F1
W4
H4
m4
V2
F2
−
−
−
A2WE
A2HE
A2mE
V7
F7
H8
m8
V3
F3
H10
m10
V4
F4
H20
m20
V5
F5
AM/PM
m40
V6
1
1
1
1
0
1
Clock-correction register access
Free register access
F6
*1. Write-only flag. The S-35190A initializes by writing “1” in this register.
*2. Scratch bit. A R/W-enabled, user-free register.
*3. Read-only flag. Valid only when using the alarm function. When the alarm time matches, this flag is set to “1”, and it is
cleared to “0” when Read.
*4. Read-only flag. “POC” is set to “1” when power is applied. It is cleared to “0” when Read. Regarding “BLD”, refer to “
Low Power Supply Voltage Detection Circuit”.
*5. Test bit for SII. Be sure to set “0” in use.
*6. No effect by Write. It is “0” when Read.
10
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
