S35390A datasheet(33/51 Pages) SII

33 / 51 page

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

Rev.2.2_00

S-35390A H Series

Seiko Instruments Inc.

4. Data access

4. 1 Real-time data 1 access

SCL

SDA

Year data

Second data

R / W

I/O mode switching

Device code

command

*1.

Set NO_ACK = 1 when reading.

*2.

Transmit ACK = 0 from the master device to the S-35390A H Series when reading.

Figure 38 Real-Time Data 1 Access

4. 2 Real-time data 2 access

SCL

SDA

Hour data

Second data

R / W

I/O mode switching

Minute data

Device code +

command

*1.

Set NO_ACK = 1 when reading.

*2.

Transmit ACK = 0 from the master device to the S-35390A H Series when reading.

Figure 39 Real-Time Data 2 Access

4. 3 Status register 1 access and status register 2 access

I/O mode switching

SCL

SDA

Status data

I/O mode switching

R / W

Device code

command

*1.

0: Status register 1 selected, 1: Status register 2 selected

*2.

Set NO_ACK = 1 when reading.

Figure 40 Status Register 1 Access and Status Register 2 Access

S35390A Datasheet(PDF) 33 Page - Seiko Instruments Inc

S35390A Datasheet(HTML) 33 Page - Seiko Instruments Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL