FEDL7732-01-10

OKI Semiconductor

MSM7732-01

9/29

DEN, EXCK, DIO

Serial control ports for MCU interface.

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

provided on the devices.

DEN is the "Enable" control signal input, EXCK is the data shift clock input, and DIO is the address and data input

or output. Figure 3 shows the input or output 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

B0

R/W

CR0

0

0

0

A/µ SEL

PON

AOUT

PDN ALL PDN TX

PDN RX

SLP

SLP SEL

LNR

R/W

CR1

0

0

1

—

—

—

—

SHORT

FRAME

SW D/E

SW C/A

RX PAD

R/W

CR2

0

1

0

TX

ON/OFF

TX GAIN2 TX GAIN1 TX GAIN0

RX

ON/OFF

RX GAIN2 RX GAIN1 RX GAIN0

R/W

CR3

0

1

1

Side Tone

GAIN2

Side Tone

GAIN1

Side Tone

GAIN0

TONE

ON/OFF

TONE

GAIN3

TONE

GAIN2

TONE

GAIN1

TONE

GAIN0

R/W

CR4

1

0

0

DTMF/

OTHERS

SEL

TONE

SEND

SAO/

VFRO

TONE4

TONE3

TONE2

TONE1

TONE0

R/W

CR5

1

0

1

—

—

—

—

—

—

—

—

R/W

CR6

1

1

0

VOX

ON/OFF

ON LVL1 ON LVL0

—

—

—

—

—

R/W

CR7

1

1

1

VOX OUT

TX NOISE

LVL1

TX NOISE

LVL0

—

—

—

—

—

R

R/W : Read/Write enable

R : Read only register

(b) Read Data Timing Diagram

W

B0

B1

B2

B3

B4

B5

B6

B7

A0

A1

A2

(a) Write Data Timing Diagram

DIO

DEN

EXCK

R

A0

A1

A2

DIO

DEN

EXCK

B0

B1

B2

B3

B4

B5

B6

B7

input

output