CXP1042Q Просмотр технического описания (PDF) - Sony Semiconductor

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производитель

CXP1042Q

System Controller for Compact Disc Players

Sony Semiconductor 

CXP1042Q

1. Deck mode/portable mode selection

A feature of the CXP1042Q is its ability to be used in both deck-type and in portable equipment.

(a) Selection

Selection is executed through Pin 20 (LOAD/DECK-PT). Mode selection is determined by the condition of

this pin immediately after reset of the CXP1042Q.

When Pin 20 (LOAD/DECK-PT) is high: Deck mode

When Pin 20 (LOAD/DECK-PT) is low: Portable/radio cassette mode

(b) Deck mode

• In deck mode the tray loading function is activated.

• Pins necessary for tray operation:

For the loading motor

For the tray SW

Pin 19 (UNLOAD/Batt-W)

Disc IN goes "L" when the tray is

goes "H" when tray is ejected closed

Pin 20 (LOAD/DECK PT)

Disc OUT goes "L" when tray is fully

goes "H" when tray is closed opened

Tray

UNLOAD direction

LOAD direction

The tray switch state is input from the microcomputer port or DSP port according to the microcomputer

operation mode.

• The relation between Pin 19 (UNLOAD/Batt-W) and Pin 20 (LOAD/DECK-PT) is as follows.

State

Open (stopped)

LOAD direction

UNLOAD direction

Close completed (stopped)

Pin 19/UNLOAD

H

L

H

H

Pin 20/LOAD

H

H

L

H

(c) Portable mode

• In portable mode, when the lid is closed the operation changes to TOC reading.

• Pin 20 (LOAD/DECK-PT) should be held "L".

• Pin 11 (Disc IN/OPEN) should be connected to a switch that makes the pin go "L" when the lid is closed.

• Two pins used in deck mode can be employed to detect a reduced battery voltage.

• When Pin 19 (UNLOAD/Batt-W) is made "L" through the reduced voltage detection circuit, BATT is

displayed.

• In addition, when Pin 19 (UNLOAD/Batt-W) is "L", forcing Pin 12 (Disc OUT/Batt-E) "L" induces the STOP

state.

• Input the Disc IN/OPEN and Disc OUT/Batt-E to the microcomputer port because the DSP expansion port

can not be used for the portable mode.

(d) Selection of tray switch input port

The microcomputer port or DSP port can be selected for the tray switch input (Disc IN/OUT) according to the

state where Pin 2 (MODE) and Pin 16 (KI3) is connected immediately after reset or not.

Not connected:

Microcomputer port used

Connected with diode: DSP port used

However, use the microcomputer port when the OPEN/Batt-E function is employed for portable mode.

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