msm7708-02 Oki Semiconductor, msm7708-02 Datasheet - Page 11

• Manufacturer Part Number: msm7708-02
• Description: Serial Register Interface Adpcm Codec For Telephone Recording
• Manufacturer: Oki Semiconductor

¡ Semiconductor
DEN, EXCK, DIN, DOUT
Serial control ports for MCU interface.
Reading and writing data is performed by an external CPU through these pins. 14-byte control
registers (CR0 - 13) are provided in this device.
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.
Input/output timing is shown in Fig. 3.
MUTE
This pin is used to enable the receive side voice path mute level.
To set the mute level, set this pin to "1".
MLV0, MLV1, MLV2
This pin is used to set the receive side voice path mute level.
For the control method, refer to the control register description (CR1). Since these signals are
ORed with CR1 - B2, B1, and B0 internally, set these register data to "0" when using this pin.
DEN
EXCK
DIN
DOUT
DEN
EXCK
DIN
DOUT
High Impedance
W
R
Figure 3 MCU Interface Input/Output Timing
A3
A3
A2
A2
(b) Read Data Timing Diagram
A1
(a) Write Data Timing Diagram
A1
A0
A0

  
 
High Impedance
B7
B7
B6
B6
B5
B5
B4
B4
B3
B3
B2
B2
B1
B1
B0
B0
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