TDA7540B datasheet(45/75 Pages) STMICROELECTRONICS

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TDA7540B

Software specification

45/75

Table 16.

Addr 5 IF Counter Control 1

MSB

LSB

Function

000

tSample = 20.48ms (FM)128ms (AM )

001

tSample = 10.24ms (FM)64ms (AM )

010

tSample = 5.12ms (FM)32ms (AM )

011

tSample = 2.56ms (FM)16ms (AM )

100

tSample = 1.28ms (FM)8ms (AM )

101

tSample = 640µs (FM)4ms (AM )

110

tSample = 320µs (FM)2ms (AM)

111

tSample = 160µs (FM)1ms (AM )

IF counter disable / stand by

IF counter enable

Not valid

IF counter FM mode

IF counter AM mode (450KHz)

IF counter AM mode (10.7MHz)

Disable mute & AGC on hold in FM mode

Enable mute & AGC on hold in FM mode

Lock detector disable

Lock detector enable

Table 17.

Addr 6 IF Counter Control 2

MSB

LSB

Function

00000

fCenter = 10.60625MHz (FM) / 10.689MHz ; 449KHz (AM)

00001

fCenter = 10.61250MHz (FM) / 10.690MHz ; 450KHz (AM)

--------

01011

fCenter = 10.67500MHz (FM) / 10.700MHz ; 460KHz (AM)

01100

fCenter = 10.68125MHz (FM) / 10.701MHz ; 461KHz (AM)

01101

fCenter = 10.68750MHz (FM) / 10.702MHz ; 462KHz (AM)

01110

fCenter = 10.69375MHz (FM) / 10.703MHz ; 463KHz (AM)

01111

fCenter = 10.70000MHz (FM) / 10.704MHz ; 464KHz(AM)

--------

11111

fCenter = 10.80000MHz (FM) / 10.720MHz ;480KHz (AM)

Not valid

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