S-35390A Seiko Instruments, S-35390A Datasheet - Page 15

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

Rev.1.2
5. Clock adjustment register
6. Free register
The clock adjustment register is a 1-byte register that is used to logically correct real-time data. When not
using the clock adjustment register, set this register to 00h using the clock adjustment register write
command.
For the “register value”, refer to “ Clock Adjustment Function ”.
MSB
The free register is a 1-byte SRAM type register that can be set freely by users. It can be read and written
MSB
within the operating voltage range (1.3 to 5.5 V).
_00
R/W
R/W
V7
F7
B7
B7
R/W
R/W
V6
B6
B6
F6
Figure 14 Clock Adjustment Register
R/W
R/W
B5
V5
B5
F5
Figure 15 Free Register
Seiko Instruments Inc.
R/W
R/W
V4
F4
B4
B4
R/W
R/W
V3
B3
B3
F3
R/W
R/W
V2
F2
B2
B2
R/W:
R/W:
2-WIRE REAL-TIME CLOCK
Read/write-enabled
Read/write-enabled
R/W
R/W
V1
B1
B1
F1
R/W
R/W
B0
V0
B0
F0
S-35390A
LSB
LSB
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