TDA6508 データシートの表示（PDF） - Philips Electronics

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TDA6508

3-band mixer/oscillator and PLL for terrestrial tuners

Philips Electronics 

Philips Semiconductors

3-band mixer/oscillator and PLL for

terrestrial tuners

Product specification

TDA6508; TDA6508A;

TDA6509; TDA6509A

Table 1 I2C-bus data format for write mode

NAME

BYTE

MSB

BITS(1)

LSB

Address byte

ADB

1

Divider byte 1

DB1

0

Divider byte 2

DB2

N7

Control byte

CB

1

Band switch byte BB

X

1

0

0

0

MA1

MA0

R/W = 0

N14

N13

N12

N11

N10

N9

N8

N6

N5

N4

N3

N2

N1

N0

CP

T2

T1

T0

RSA

RSB

WSB

X

X

P4

P3

P2

P1

P0

Note

1. X = don’t care.

Table 2 Function of write mode bits used in Table 1

BIT

MA1 and MA0

R/W

N14 to N0

CP

T2, T1 and T0

RSA and RSB

WSB

P0, P1, P2, P3, P4

FUNCTION

module address; see Table 3

read/write mode; 0 = write mode

programmable divider bits: N = N14 × 214 + N13 × 213 + ... + N1 × 21 + N0

charge-pump current control:

0: charge-pump current is 20 µA

1: charge-pump current is 100 µA

test mode; see Table 5

reference divider ratio; see Table 4

Weak Signal Booster control:

0: normal mode - no gain increase: external IF filter used

1: Weak Signal Booster activated: IF filter by-passed

port P0 to P4 control:

0: corresponding port is off; high impedance state (default)

1: corresponding port is on.

Table 3 Module address selection bits

MA1

0

0

1

1

MA0

0

1

0

1

VOLTAGE APPLIED TO PIN AS

0 V to 0.1VCC

0.2VCC to 0.3VCC or open-circuit

0.4VCC to 0.6VCC

0.9VCC to 1.0VCC

2005 Mar 25

9

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