TDA7427 Datasheet, PDF (14/21 Pages) STMicroelectronics – AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

TDA7427
PLL COUNTER 2 (MSB)
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0 MSB = 0
0
0
0
0
0
0
0
1 MSB = 256
0
0
0
0
0
0
1
0 MSB = 512
FUNCTION
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PC15 PC14 PC13 PC12 PC11
Swallow mode: fvco/fsyn = LSB + MSB + 32
Direct mode: fvco/fsyn = LSB + MSB + 1
1
1
1
1
PC10
0
0
1
1
PC9
0 MSB = 64768
1 MSB = 65024
0 MSB = 65280
1 MSB = 65536
PC8 Bit name
Subddress = 02H
PLL REFERENCE COUNTER 1 (LSB)
MSB
D7
D6
D5
D4
D3
D2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LSB
D1 D0
0
0 LSB = 0
0
1 LSB = 1
1
0 LSB = 2
1
1
1
1
1
1
0
0 LSB = 252
1
1
1
1
1
1
0
1 LSB = 253
1
1
1
1
1
1
1
0 LSB = 254
1
1
1
1
1
1
1
1 LSB = 255
RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 Bit name
FUNCTION
Subaddress =03H
PLL REFERENCE COUNTER 2 (MSB)
MSB
D7
D6
D5
D4
D3
D2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LSB
D1 D0
0
0 MSB = 0
0
1 MSB = 256
1
0 MSB = 512
FUNCTION
1
1
1
1
1
1
1
1
1
1
1
1
RC15 RC14 RC13
fOSC/fREF = LSB + MSB + 1
1
1
1
1
RC12
1
1
1
1
RC11
1
1
1
1
RC10
0
0
1
1
RC9
0
1
0
1
RC8
MSB = 64768
MSB = 65024
MSB = 65280
MSB = 65536
Bit name
Subddress = 04H
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