TDA9615 Ver la hoja de datos (PDF) - Philips Electronics

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Fabricante

TDA9615

13.2 V, audio processor for VHS hi-fi

Philips Electronics 

Philips Semiconductors

Audio processor for VHS hi-fi

Preliminary specification

TDA9615H

Power byte; subaddress 07 (power-up control and test)

Table 26 Bits of power byte

BIT

CALS

VCCH

TEST

PORR

calibration start; see Table 27

VCC high; see Table 28

test; see Table 29

POR reset; see Table 30

DESCRIPTION

Table 27 Bit CALS; note 1

CALS(2)

MODE

0

− (note 3)

1

start calibration

DESCRIPTION

−

start of automatic calibration cycle

Notes

1. Pin 39 (ENVOUT) or bit CALR of the read byte can be monitored to check for successful completion of the calibration.

It is advised to keep CALS logic 1 after calibration to ensure a reliable CALR state.

2. After a change of bit CALS from logic 0 to logic 1, an automatic frequency calibration is performed setting hi-fi

modem, band-pass filter and noise reduction. Use of auto-calibration is only needed after power-up of the supply

voltage (POR).

3. POR.

Table 28 Bit VCCH; notes 1 and 2

VCCH

0

1

MODE

9 V; note 3

12 V

output DC voltage is 4.5 V

output DC voltage is 6 V

DESCRIPTION

Notes

1. To maximize the output drive when using 12 V supply voltage (VCC; pin 35), the DC level of outputs LINEL, LINER,

DECL and DECR (pins 15, 16, 18 and 19) can be changed using bit VCCH.

2. Use of the power mute function (bit MUTE of the control byte) ensures disturbance-free switching of the line output

signal when setting VCCH after power-up.

3. POR.

Table 29 Bit TEST; note 1

TEST

0

1

MODE

− (note 2)

test

DESCRIPTION

standard operation

special measurement test modes

Notes

1. Several special test modes can be selected for testing and evaluation purposes. Bits s4 to NIL0 of the select byte

are used for selection of these tests.

2. POR.

1997 Jun 16

20

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