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MSM7570-01

Multi-Function ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7570-01

DEN , EXCK, DIN, DOUT

Serial control ports for MCU interface.

Reading and writing data are performed by an external MCU through these pins. Eight registers

,
,
witheightbitsareprovidedonthedevices.

DEN is the “Enable” control signal input, EXCK is the data shift clock input, DIN is the address

and data input, and DOUT is the data output.

Fig.3 shows the input/output timing diagram.

DEN

EXCK

DIN

W A2 A1 A0 B7 B6 B5 B4 B3 B2 B1 B0

DOUT

High Impedance

(a) Write Data Timing Diagram

DEN

EXCK

DIN

R A2 A1 A0

 DOUT

High Impedance

B7 B6 B5 B4 B3 B2 B1 B0

(b) Read Data Timing Diagram

Figure 3 MCU Interface Input/Output Timing

Table 1 shows the register map.

Table-1

Address

Control and Detect Data

Name

A2 A1 A0 B7

B6

B5

B4

B3

B2

B1

CR0 0 0 0

A/m

MCK

PDN

—

—

—

—

R/W

B0

PDN R/W

SEL

SEL

ALL

SAO/AOUT

CR1 0 0 1 MODE1 MODE0 TX

RX

TX

RX

—

RESET RESET MUTE MUTE

RX R/W

PAD

CR2 0 1 0

TX

TX

TX

TX

RX

RX

RX

RX R/W

ON/OFF GAIN2 GAIN1 GAIN0 ON/OFF GAIN2 GAIN1 GAIN0

CR3 0 1 1 Side Tone Side Tone Side Tone TONE TONE TONE TONE TONE R/W

GAIN2 GAIN1 GAIN0 ON/OFF GAIN3 GAIN2 GAIN1 GAIN0

CR4 1

0

0

DTMF/

OTHERS

TONE

SAO/

TONE4 TONE3 TONE2 TONE1 TONE0 R/W

SEL SEND VFRO

CR5 1 0 1

—

—

—

—

—

—

—

— R/W

CR6 1 1

CR7 1 1

0

VOX

ON

ON/OFF LVL1

ON

LVL0

OFF

TIME

1

VOX TX NOISE TX NOISE

—

OUT LVL1 LVL0

VOX RX NOISE RX NOISE RX NOISE

R/W

IN LEVEL SEL LVL1 LVL0

—

—

—

—R

R/W : Read/Write enable R : Read only register.

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