M41T00AUDD1F Просмотр технического описания (PDF) - STMicroelectronics

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производитель

M41T00AUDD1F

Serial real-time clock (RTC) with audio

STMicroelectronics 

Operation

4

Operation

M41T00AUD

The M41T00AUD clock operates as a slave device on the serial bus. Access is obtained by

implementing a start condition followed by the correct slave address (D0h). The 10 bytes

contained in the device can then be accessed sequentially in the following order:

Table 2. List of registers

Byte address

Contents

00h

Seconds register

01h

Minutes register

02h

Century/hours register

03h

Day register

04h

Date register

05h

Month register

06h

Years register

07h

Calibration/control register

08h

Audio register

09h

Control2 register

The M41T00AUD continually monitors VCC for an out of tolerance condition. Should VCC fall

below VPFD, the device terminates an access in progress and resets the device address

counter. Inputs to the device will not be recognized at this time to prevent erroneous data

from being written to the device from an out of tolerance system. When VCC falls below VSO,

the device automatically switches over to the backup battery or capacitor and powers down

into an ultra low current mode of operation to conserve battery life. Upon power-up, the

device switches from battery to VCC at VSO and recognizes inputs.

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Doc ID 13480 Rev 5

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