S-35392A Datasheet, PDF (9/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.3_00
2-WIRE REAL-TIME CLOCK
S-35392A
2. Configuration of command
8 types of command are available for the S-35392A, The S-35392A does Read/Write the various registers by inputting
these fixed codes and commands. The S-35392A does not perform any operation with any codes and commands other
than those below.
Table 9 List of Command
Device
Command
Data
Code C2 C1 C0
Description
0 0 0 Status register 1 access
0 0 1 Status register 2 access
B7
B6
B5
RESET^*1 12/ 24 SC0^*2
INT1FE INT1ME INT1AE
B4
SC1^*2
SC2^*2
B3
B2
B1
B0
INT1^*3 INT2^*3 BLD^*4 POC^*4
INT2FE INT2ME INT2AE TEST^*5
Real-time data 1 access
010
(year data to)
Real-time data 2 access
011
(hour data to)
Y1
Y2
Y4
Y8 Y10 Y20 Y40 Y80
M1
M2
M4
M8 M10
−^*6
−^*6
−^*6
D1
D2
D4
D8
D10 D20
−^*6
−^*6
W1 W2 W4
−^*6
−^*6
−^*6
−^*6
−^*6
H1
H2
H4
H8
H10 H20 AM/ PM −^*6
m1
m2
m4
m8 m10 m20 m40
−^*6
s1
s2
s4
s8
s10 s20 s40
−^*6
H1
H2
H4
H8
H10 H20 AM/ PM −^*6
m1
m2
m4
m8 m10 m20 m40
−^*6
s1
s2
s4
s8
s10 s20 s40
−^*6
INT1 register access
W1 W2 W4
−^*6
−^*6
−^*6
−^*6 A1WE
(alarm time 1: week/hour/minute)
0110
H1
H2
H4
H8 H10 H20 AM/PM A1HE
(INT1AE = 1, INT1ME = 0,
m1
m2
m4
m8 m10 m20 m40 A1mE
1 0 0 INT1FE = 0)
INT1 register access
(free register)
SC3^*2 SC4^*2 SC5^*2 SC6^*2 SC7^*2 SC8^*2 SC9^*2 SC10^*2
(settings other than alarm time 1)
INT2 register access
W1 W2 W4
−^*6
−^*6
−^*6
−^*6 A2WE
(alarm time 2: week/hour/minute)
H1
H2
H4
H8 H10 H20 AM/PM A2HE
(INT2AE = 1, INT2ME = 0,
m1
m2
m4
m8 m10 m20 m40 A2mE
1 0 1 INT2FE = 0)
INT2 register access
(output of user-set frequency)
1 Hz 2 Hz 4 Hz 8 Hz 16 Hz SC11^*2 SC12^*2 SC13^*2
(INT2ME = 0, INT2FE = 1)
1 1 0 Clock correction register access V0
V1
V2
V3
V4
V5
V6
V7
1 1 1 Free register access
F0
F1
F2
F3
F4
F5
F6
F7
*1. Write-only flag. The S-35392A 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.
Seiko Instruments Inc.
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