DS1305E-T View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

Manufacturer

DS1305E-T

Serial Alarm Real Time Clock (RTC)

Dallas Semiconductor -> Maxim Integrated 

Configuration 2: Backup Supply is a Rechargeable Battery or Super

Capacitor

DS1305

Configuration 3: Battery Operate Mode

FUNCTION TABLE Table 3

MODE

CE

SCLK

Disable Reset

L

Input Disabled

Write

H

CPOL=1*

SDI

Input Disabled

Data Bit Latch

SDO

High Z

High Z

Read

CPOL=0

H

CPOL=1

X

Next data bit shift**

CPOL=0

* CPOL is the “Clock Polarity” bit that is set in the control register of the microcontroller.

** SDO remains at High Z until 8 bits of data are ready to be shifted out during a read.

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