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 6 Read data format

NAME

BYTE

MSB(1)

Address byte ADB

1

1

0

Status byte

SB

POR

FL

1

Note

1. MSB is transmitted first.

BIT

0

0

1

1

MA1

A2

MA0

A1

LSB

R/W = 1

A0

Table 7 Description of the bits used in Table 6

BIT

MA1 and MA0

R/W

POR

FL

A2, A1 and A0

DESCRIPTION

programmable address bits; see Table 3

read/write mode selection; 1 = read mode

Power-on reset flag:

0: after end of the first read sequence

1: at Power-on

in-lock flag:

0: loop is not locked

1: loop is locked

digital outputs of the 5-level ADC; see Table 8

Table 8 Digital outputs for analog to digital converter (note 1)

A2

0

0

0

0

1

A1

0

0

1

1

0

A0

0

1

0

1

0

VOLTAGE APPLIED TO PIN ADC

0 VCC to 0.15 VCC

0.15 VCC to 0.3 VCC

0.3 VCC to 0.45 VCC

0.45 VCC to 0.6 VCC

0.6 VCC to 1 VCC

Note

1. Accuracy is ±0.03 × VCC.

8.4 Power-on reset

The threshold level for the power-on reset supply voltage VPOR is set to 3.2 V at room temperature. Below this threshold,

the device is reset to the power-on state.

The following actions take place In the power-on state:

• The charge-pump current is set to 100 µA

• Test bits T2, T1 and T0 are set to logic 001; the charge-pump can either sink or source current

• The Weak signal booster is disabled

• All ports are off and the HIGH band is selected by default.

2005 Mar 25

11

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