TDA7421 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7421' PDF : 38 Pages View PDF
TDA7421
PLL COUNTER 2 (MSB)
MSB
D7 D6 D5 D4 D3 D2 D1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
all combinations allowed
1
1
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PC15 PC14 PC13 PC12 PC11 PC10 PC9
Swallow mode: fvco/fsyn = LSB + MSB + 32
LSB
D0
0
1
0
0
1
0
1
PC8
MSB = 0
MSB = 256
MSB = 512
•••
MSB = 64768
MSB = 65024
MSB = 65280
MSB = 65536
Bit name
FUNCTION
Subddress = 02H
PLL REFERENCE COUNTER 1 (LSB)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0
0
0
0
0 LSB = 0
0
0
0
0
0
0
0
1 LSB = 1
0
0
0
0
0
0
1
0 LSB = 2
all combinations allowed
•••
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
all combinations allowed
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
RC15 RC14 RC13 RC12 RC11 RC10
fOSC/fREF = LSB + MSB + 1
D1
0
0
1
0
0
1
1
RC9
LSB
D0
0
1
0
0
1
0
1
RC8
MSB = 0
MSB = 256
MSB = 512
•••
MSB = 64768
MSB = 65024
MSB = 65280
MSB = 65536
Bit name
FUNCTION
Subddress = 04H
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