HT1382 View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT1382

I2C/3-Wire Real Time Clock

Holtek Semiconductor 

HT1382

I2C/3-Wire Real Time Clock

Alarm Enable Bit - AE

This bit enables/disables the alarm function. When the AE bit is set to ²1², the alarm function is

enabled. When the AE bit is cleared to ²0², the alarm function is disabled.

Digital Trimming Setting Bits - DTS

This bit sets the digital trimming resolution and adjustment time. The user must detect the status of the

EB bit before reading data or writing data. If the EB bit is ²0², it is valid to read data or write data. If the

EB bit is ²1², it is invalid to read data or write data.

Adjustment time

Minimum resolution

Correction range

DTS=²0²

Every 10 seconds

3.052ppm

-192.276ppm to +192.276ppm

DTS=²1²

Every 30 seconds

1.017ppm

-64.071ppm to + 64.071ppm

Digital Trimming Bits - DT6~DT0

This digital trimming bit, DT6, is the sign bit. A ²0² indicates positive calibration and a ²1² indicates

negative calibration. DT5~DT0 are the calibration values and the adjustable range is -63 ~ +63. If DTS

is cleared to ²0², the correction range is -192.276ppm to +192.276ppm and if DTS is set to ²1², the

correction range is -64.071ppm to +64.071ppm. The user must detect the status of EB bit before

reading data or writing data. If the EB bit is ²0², it is valid to read data or write data. If the EB bit is ²1²,

it is invalid to read data or write data.

DT6 DT5 DT4 DT3 DT2 DT1 DT0 Value

0

1

1

1

1

1

1

+63

0

1

1

1

1

1

0

+62

0

1

1

1

1

0

1

+61

0

1

1

1

1

0

0

+6

:

:

0

0

0

0

0

1

1

+3

0

0

0

0

0

1

0

+2

0

0

0

0

0

0

1

+1

0

0

0

0

0

0

0

0

1

0

0

0

0

0

0

0

1

0

0

0

0

0

1

-1

1

0

0

0

0

1

0

-2

1

0

0

0

0

1

1

-3

:

:

1

1

1

1

1

0

0

-60

1

1

1

1

1

0

1

-61

1

1

1

1

1

1

0

-62

1

1

1

1

1

1

1

-63

Correction Value (ppm)

DTS=²0²

DTS=²1²

+192.276

+64.071

+189.224

+63.054

+186.172

+62.037

+183.120

+61.020

:

:

:

:

+9.156

+3.051

+6.104

+2.034

+3.052

+1.017

0

0

0

0

-3.052

-1.07

-6.104

-2.034

-9.156

-3.051

:

:

:

:

-183.120

-61.020

-186.172

-62.037

-189.224

-63.054

-192.276

-64.071

Rev. 1.40

14

May 27, 2011

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