參數(shù)資料
型號(hào)： S-3531A
廠(chǎng)商： Seiko Instruments Inc.
英文描述： CMOS Real-Time Clock IC Supporting an IIC-Bus(支持IIC-BUS的CMOS實(shí)時(shí)時(shí)鐘芯片)
中文描述： CMOS實(shí)時(shí)時(shí)鐘IC支持一個(gè)IIC總線(xiàn)（支持IIC總線(xiàn)的實(shí)時(shí)時(shí)鐘芯片的CMOS）
文件頁(yè)數(shù)： 4/31頁(yè)
文件大?。?/td> 185K
代理商： S-3531A
REAL-TIME CLOCK
S-3531A
Seiko Instruments Inc.
3
Description of Operation
1. Serial interface
S-3531A receives various commands through the I
2
C-BUS-based serial interface to read/write data. The method of I
2
C-BUS-
based transfer is described here.
1-1.
Start condition
When the SCL line is on the “H” level, the line changes from “H” to “L” so that the start condition is obtained. All the
operations begin at the start condition.
1-2.
Stop condition
When the SCL line is on the “H” level, the line changes from “L” to “H” so that the stop condition is reached. During
a read sequence, any read operation is stopped and a device enters its stand-by mode when a stop condition is
received.
1-3.
Data transfer
When the SDA line is changed while it is on “L”, data transfer is performed.
When the SDA line is changed while it is on “H”, a start or stop condition is recognized.
Figure 3 Start/Stop condition
t
SU.STA
t
HD.STA
t
SU.STO
Start condition
Stop condition
SCL
SDA
Figure 4 Data transfer timing
t
SU.DAT
t
HD.DAT
SCL
SDA
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