S-35390A Datasheet, PDF (9/54 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.2.4_00
2-WIRE REAL-TIME CLOCK
S-35390A
2. Configuration of command
8 types of command are available for the S-35390A, The S-35390A does Read/Write the various registers by inputting
these codes and commands. The S-35390A 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
B7
B6
B5
B4
B3
B2
B1
B0
0 0 0 Status register 1 access
0 0 1 Status register 2 access
RESET^*1 _{12/ 24} SC0^*2 SC1^*2 INT1^*3 INT2^*3 BLD^*4 POC^*4
INT1FE INT1ME INT1AE 32kE INT2FE INT2ME INT2AE TEST^*5
0 1 0 ^{Real-time data 1 access}
(year data to)
0
1
1
Real-time data 2 access
(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
0110
(alarm time 1: week/hour/minute)
(INT1AE = 1, INT1ME = 0,
H1
H2
H4
H8 H10 H20 AM/PM A1HE
1 0 0 INT1FE = 0)
m1 m2 m4 m8 m10 m20 _m40 A1mE
INT1 register access
(output of user-set frequency)
1 Hz 2 Hz 4 Hz 8 Hz 16 Hz SC2 ^*2 SC3 ^*2 SC4 ^*2
(INT1ME = 0, INT1FE = 1)
INT2 register access
(alarm time 2: week/hour/minute)
W1
H1
(INT2AE = 1, INT2ME = 0,
m1
1 0 1 INT2FE = 0)
W2
H2
m2
W4
H4
m4
−^*6
−^*6
−^*6
−^*6 _A2WE
H8 H10 H20 _AM/PM A2HE
m8 m10 m20 _m40 A2mE
INT2 register access
(output of user-set frequency)
1 Hz 2 Hz 4 Hz 8 Hz 16 Hz SC5 ^*2 SC6 ^*2 SC7 ^*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-35390A 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.
9