HT1382 Просмотр технического описания (PDF) - Holtek Semiconductor

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HT1382

I2C/3-Wire Real Time Clock

Holtek Semiconductor 

HT1382

I2C/3-Wire Real Time Clock

EEPROM Busy Status Bit - EB

This bit is set to ²1² when a write operation to the EEPROM has not completed. When this bit is set to

²1², reading data from the EEPROM or writing data to the EEPROM is invalid. After an EEPROM

write has finished, this bit will be cleared to ²0² and the user can read data from the EEPROM or write

data to the EEPROM.

Output Enable On Battery Mode Bit - OEOBM

This bit enables/disables the IRQ/FOUT pin in the battery mode. When the OEOBM bit is set to ²1²,

the IRQ/FOUT pin is disabled in the battery mode and the frequency output and alarm function are

disabled. When the OEOBM bit is cleared to ²0², the IRQ/FOUT pin is enabled in the battery mode.

Low Power Mode Bit - LPM

This bit enables/disables the Low Power Mode. When the LPM bit is cleared to ²0², the device will be

in the normal mode and will use the VBAT supply when VDD < VBAT and VDD < V . COMP When the LPM bit is

set to ²1², the device is in the Low Power Mode and uses the VBAT supply when VDD < V . BAT

Frequency Output Bits - FO3~FO0

These bits enable/disable the frequency output function and selects the output frequency at the FOUT

pin. The frequency selection table is shown below. It overrides the alarm mode. The 1, 1/2, 1/4, 1/8,

1/16, 1/32 frequency outputs are compensated.

FOUT(Hz)

FO3

FO2

FO1

FO0

¾

0

0

0

0

32768

0

0

0

1

4096

0

0

1

0

1024

0

0

1

1

64

0

1

0

0

32

0

1

0

1

16

0

1

1

0

8

0

1

1

1

4

1

0

0

0

2

1

0

0

1

1

1

0

1

0

1/2

1

0

1

1

1/4

1

1

0

0

1/8

1

1

0

1

1/16

1

1

1

0

1/32

1

1

1

1

Rev. 1.40

13

May 27, 2011

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