TDA7421 datasheet(21/38 Pages) STMICROELECTRONICS

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PLL COUNTER 1 (LSB)

MSB

LSB

FUNCTION

000000

LSB = 0

000001

LSB = 1

000010

LSB = 2

all combinations allowed

• • •

111100

LSB = 252

111101

LSB = 253

111110

LSB = 254

111111

LSB = 255

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

Bit name

Subaddress = 01H

PLL DATA BYTE SPECIFICATION

CHARGEPUMP CONTROL

MSB

LSB

FUNCTION

0000

High current = 0mA

0001

High current = 0.5mA

0010

High current = 1.0mA

0011

High current = 1.5mA

0100

High current = 2.0mA

0101

High current = 2.5mA

0110

High current = 3.0mA

0111

High current = 3.5mA

1000

High current = 4.0mA

1001

High current = 4.5mA

1010

High current = 5.0mA

1011

High current = 5.5mA

1100

High current = 6.0mA

1101

High current = 6.5mA

High current = 7.0mA

1111

High current = 7.5mA

Low current = 0

µA

Low current = 15

µA

Low current = 100

µA

Low current = 115

µA

Select low Current

Select high Current

Select loop filter 1

Select loop filter 2

LPIN1/2 CURRH

Subaddress = 00H

TDA7421

21/38

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