S-35390A-T8T1G 参数 Datasheet PDF下载

2-WIRE REAL-TIME CLOCK

S-35390A

Configuration of Data Communication

1. Configuration of data communication

Rev.2.4

_00

For data communication, the master device in the system generates a start condition for the S-35390A. Next, the master

device transmits 4-bit device code “0110”, 3-bit command and 1-bit Read/Write command to the SDA bus. After that,

output or input is performed from B7 of data. If data I/O has been completed, finish communication by inputting a stop

condition to the S-35390A. The master device generates an acknowledgment signal for every 1-byte. Regarding details,

refer to “

Serial Interface

”.

Start condition

Device code

STA

0

1

1

0

C2

Command

C1

C0

Read/Write bit

Acknowledgment bit

R/W

ACK

Stop condition

1-byte data

B7

B6

B5

B4

B3

B2

B1

B0

ACK

STP

Figure 10

Data Communication

8

Seiko Instruments Inc.