S35390A datasheet(16/51 Pages) SII

16 / 51 page

FOR AUTOMOTIVE 105°C OPERATION 2-WIRE REAL-TIME CLOCK

S-35390A H Series

Rev.2.2_00

Seiko Instruments Inc.

4. 2 Output of user-set frequency

The INT1 and INT2 registers are 1-byte data registers to set up the output frequency. Setting each bit B7 to B3 in the

and SC5 to SC7 in the INT2 register are 3-bit SRAM type registers that can be freely set by users.

R / W

8 Hz

SC2

16 Hz

4 Hz

R / W

SC3

SC4

2 Hz

1 Hz

R / W: Read / write

Figure 14 INT1 Register (Data Register for Output Frequency)

R / W

8 Hz

SC5

16 Hz

4 Hz

R / W

SC6

SC7

2 Hz

1 Hz

R / W: Read / write

Figure 15 INT2 Register (Data Register for Output Frequency)

Example:

B7 to B3 = 50h

16 Hz

8 Hz

4 Hz

2 Hz

1 Hz

INT1 pin /

INT2 pin output

Status register 2

• Set to INT1FE or INT2FE = 1

Figure 16 Example of Output from INT1 and INT2 Registers (Data Register for Output Frequency)

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