TDA6508ATT datasheet(9/42 Pages) PHILIPS

9 / 42 page

2005 Mar 25

Philips Semiconductors

Product speciﬁcation

3-band mixer/oscillator and PLL for

terrestrial tuners

TDA6508; TDA6508A;

TDA6509; TDA6509A

Table 1

I2C-bus data format for write mode

Note

1. X = don’t care.

Table 2

Function of write mode bits used in Table 1

Table 3

Module address selection bits

NAME

BYTE

BITS(1)

MSB

LSB

Address byte

ADB

11000MA1

MA0

R/W=0

Divider byte 1

DB1

N14

N13

N12

N11

N10

Divider byte 2

DB2

Control byte

RSA

RSB

WSB

Band switch byte

XXXP4

BIT

FUNCTION

MA1 and MA0

module address; see Table 3

R/W

read/write mode; 0 = write mode

N14 to N0

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

T2, T1 and T0

test mode; see Table 5

RSA and RSB

reference divider ratio; see Table 4

WSB

Weak Signal Booster control:

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

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

P0, P1, P2, P3, P4

port P0 to P4 control:

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

1: corresponding port is on.

MA1

MA0

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

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