CXP1021Q Ver la hoja de datos (PDF) - Sony Semiconductor

Número de pieza

componentes Descripción

Fabricante

CXP1021Q

System Controller for Compact Disc Players

Sony Semiconductor 

CXP1021Q

1. Deck mode/portable mode selection

A feature of the CXP1021Q is its ability to be used in both deck-type and in portable equipment.

(a) Selection

Selection is executed through Pin 39 (LOAD/DECK-PT). Mode selection is determined by the condition of

this pin immediately after reset of the CXP1021Q.

When Pin 39 (LOAD/DECK-PT) is high: Deck mode

When Pin 39 (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

Pin 40 (UNLOAD/Batt-W)

goes "L" when tray is ejected

Pin 39 (LOAD/DECK PT)

goes "L" when tray is closed

For the tray SW

Pin 37 (Disc IN) goes "L" when the

tray is closed

Pin 38 (Disc OUT/Batt-E) goes "L"

when tray is fully opened

Tray

UNLOAD direction

LOAD direction

• The relation between Pin 40 (UNLOAD/Batt-W) and Pin 39 (LOAD/DECK-PT) is as follows.

State

Open (stopped)

LOAD direction

UNLOAD direction

Pin 40/UNLOAD

H

H

L

Pin 39/LOAD

H

L

H

(c) Portable mode

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

• Pin 39 (LOAD/DECK-PT) should be held "L".

• Pin 37 (Disc IN) 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 40 (UNLOAD/Batt-W) is made "L" through the reduced voltage detection circuit, BATT is

displayed.

• In addition, when Pin 40 (UNLOAD/Batt-W) is "L", forcing Pin 38 (Disc OUT/Batt-E) "L" induces the STOP

state.

– 10 –

Share Link: