UPD9930 datasheet(13/78 Pages) NEC

номер детали	UPD9930

подробное описание детали	LINEAR CODEC FOR DIGITAL CELLULAR TELEPHONE

PDF	78 Pages

Scroll/Zoom	100%

производитель	NEC [NEC]

домашняя страница	http://www.nec.com/

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13 / 78 page

µPD9930

Figure 2-5 Power Down Control

Caution MICPDB and XAUXPDB cannot enter the power up state at the same time (MICPDB = XAUXPDB =

"1").

Power up command

—

Power down command

—

REC2PDB

TXAG

TXGCR

MICPDB XAUXPDB REC1PDB RAUXPDB RINGPDB

AMPCR

Pre-filter

+ mixer

to Vref

–

to Vref

Accessory input

Microphone input

–

to Vref

MICPDB

"1" = Power ON

XAUXPDB

–

RAUXPDB

–

REC1PDB

Accessory output

Receiver 1

Receiver 2

–

Ringer output

RINGPDB

Stand-by

REC2PDB

Stand-by

When both accessory output

and receiver 1 amplifiers are

in the power down state, these

also enter power down state.

Stand-by

D/A

Stand-by

When all input amplifiers are

in the power down state,

these also enter power

down state.

Digital signal

processor

Stand-by

A/D

Stand-by

PLL

to XACOMI

78H

1EH

70H

0EH

HEXNote

Note M: HEX value with MSB first L: HEX value with LSB first

"1" = Power ON

"1" = Ringer output

"1" = Power ON

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