MSM7502GS-BK データシートの表示（PDF） - Oki Electric Industry

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MSM7502GS-BK

Multi-Function PCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7502

AD0, AD1

Address data inputs for the internal control registers.

Addressing of the internal control registers is executed by AD0 and AD1 and sub address data,

DB7 and DB6.

AD1 AD0 DB7 DB6

00

01

0010

11

00

01

WRITE 0 1

10

11

1 0 ——

1100

1101

1110

1111

Function

ON/OFF controls of sounder, R-Tone, F-Tone

Level/Frequency controls of sounder, R-Tone

PB tone control

Controls of internal speech path switch and general latch

Watchdog timer reset

Controls of receive gain and side tone gain

Controls of transmit hold tone, PB tone, handfree input, handset inputs gain

Controls of speaker pre-amplifier gain and additional speaker gain

Controls of receive PAD and incoming tone input gain

Key scanning output control

Key scanning interrupt reset

LCD deflection angle control voltage setting

Power ON/OFF control

CODEC control (Controls of companding law and digital loop)

READ 1 0 — — Key scanning data read-out

WRN

Write signal for internal control registers.

Data on the data bus is written into the registers at the rising edge of WRN under the condition

of digital "0" of CEN (Chip Enable). While CEN is in digital "1" state, WRN becomes invalid. The

Write cycle is a minimum of 2 ms regardless of the presence or absence of clock signals.

RDN

Read signal input to read PI0 to PI7 out of the processor.

When CEN and RDN are in digital "0" state, the digital values on PI0 to PI7 are output onto the

data buses DB0 to DB7. While CEN is in digital "1" state, the RDN signal becomes invalid.

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