STC5455 datasheet(30/56 Pages) CONNOR-WINFIELD

30 / 56 page

Page 30 of 56 TM121

Rev:P1.3

Date: October 24, 2011

STC5455

Synchronous Clock for SETS

Data sheet

Preliminary

Freerun_Cali, 0x0C (R/W)

Calibrate frequency of internal freerun clock, from -102.4 to +102.3 ppm, in 0.1ppm steps, 2’s complement.

Default value: 0

Disqualification_Range, 0x0E (R/W)

Reference disqualification range, from 0 to +102.3 ppm, in 0.1 ppm steps. This also sets the pull-in range. (See

the Reference Input Monitoring and Qualification section). New disqualification range must be greater than

qualification range in register Qualification_Range. Otherwise, the value will not be written to the register.

Default value: 110 (range = 11.0 ppm).

Qualification_Range, 0x10 (R/W)

Reference qualification range, from 0 to +102.3 ppm, in 0.1 ppm steps. New qualification must be less than dis-

qualification range. Otherwise, the value will not be written to the register.

Default value: 100 (range = 10.0 ppm).

Qualification_Soaking_Time, 0x12 (R/W)

Sets the soaking time for reference qualification, from 0 to 63s, in 1s step.

Default value: 10 (10s)

Ref_Index_Selector, 0x13 (R/W)

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x0C

Lower 8 bits of Freerun Calibration

0x0D

Not used

Upper 3 bits of Freerun Calibration

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x0E

Lower 8 bits of Disqualification Range

0x0F

Not used

Upper 2 bits Disqualification Range

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x10

Lower 8 bits of Qualification Range

0x11

Not used

Upper 2 bits Qualification Range

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x12

Not used

0 ~ 63 s

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x13

Not used

REF1~REF5

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