STW81103 datasheet(34/53 Pages) STMICROELECTRONICS

Part #	STW81103

Description	Multi-band RF frequency synthesizer with integrated VCOs

PDF	53 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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34 / 53 page

I2C bus interface

STW81103

34/53

CALIBRATION

This register controls the VCO calibrator using the following values:

6.3.2

Read-only register

This register is automatically addressed in the ‘current byte address read mode’, using the

following values:

6.3.3

Default configuration

At power on, all the bits are set to '0'. Consequently the part starts in power down mode.

MSB

LSB

INITCAL

SERCAL

SELEXTCAL

CAL4

CAL3

CAL2

CAL1

CAL0

INITCAL:

for test purposes only, must be set to 0

SERCAL:

at 1 starts the VCO auto-calibration (automatically reset to 0 at the end of calibration)

SELEXTCAL: for test purposes only; must be set to 0

CAL[4:0]:

for test purposes only; must be set to 0

MSB

LSB

DEV_ID1

DEV_ID0

LOCK_DET

INTCAL4

INTCAL3

INTCAL2

INTCAL1

INTCAL0

DEV_ID[1:0]:

device identifier bits; returns ‘10’

LOCK_DET:

1 when PLL is locked

INTCAL[4:0]:

internal value of the VCO control word

STW81103 Datasheet(PDF) 34 Page - STMicroelectronics

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