MSM7719-01

更新时间： 2024-02-10 11:57:02

品牌	Logo	应用领域
冲电气 - OKI		转换器 PC
页数	文件大小	规格书
40页	217K
描述
Echo Canceler with ADPCM Transcoder

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MSM7719-01 技术参数

MSM7719-01

¡ Semiconductor

PIN FUNCTIONAL DESCRIPTION

Outputs of the analog signal ground voltage.

The output voltage is approximately 2.4 V. Connect bypass capacitors of 10 mF and 0.1 mF

(ceramic type) between these pins and the AG pin. During power-down, the output changes

to 0 V.

Analog ground.

DG1, 2, 3

Digital ground.

DDA

+5 V power supply for analog circuits.

DDD1, 2, 3

+5 V power supply for digital circuits.

PDN/RST

Power-down reset control input.

A logic “0” makes the LSI device enter a power-down state. At the same time, all control register

data are reset to the initial state. Set this pin to a logic “1” during normal operating mode. Since this pin

isORed with CR0-B5 (bit 5 (B5) of control register CR0), set CR0-B5 to logic “0” when using this pin.

When this pin control is not used (i.e., when controlling by the control register), set this pin to logic

“1”.

PDWN

Power-down control input.

The device changes to the power-down state, and each bit of control register and internal variables

of control register are not reset when set to alogic “0”. During normal operation, set this pin to logic

“1”. Since this pin is ORed with CR0-B6 (bit 6 (B6) of control register CR0), set CR0-B6 to logic “0”

whenusingthispin. Whenthispincontrolisnotused(i.e., whencontrollingbythecontrolregister),

set this pin to logic “1”.

MCK

Master clock input.

The frequency must be 9.6 to 10.0 MHz/19.2 to 20.0 MHz. The master clock signal is allowed to be

asynchronous with SYNCP, SYNCA, BCLKP, and BCLKA.

4/40

1 2 345 6 7...40

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