MSM6688GS-2K 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM6688GS-2K

ADPCM Solid-State Recorder IC

Oki Electric Industry 

¡ Semiconductor

MSM6688/6688L

Pin

Symbol

Type

Description

Used to select one of the following four types of sampling

frequency. The relationship between the master clock frequency

(fosc) and the sampling frequency (fsamp) is shown below.

Values in parentheses denote the sampling frequencies for

fosc = 4.096 MHz.

11

SAM1

I

12

SAM2

SAM2

L

L

H

H

SAM1

L

H

L

H

fsamp

fosc

fosc

fosc

fosc

1024

768

640

512

(4.0kHz) (5.3kHz) (6.4kHz) (8.0kHz)

This input pin is used to select the condition for transition to the

power-down state.

Low level: The MSM6688 automatically goes to the power-down

state, excepting the time the record/playback

operation is being performed.

High level: The MSM6688 automatically goes to the standby

9

PDMD

I

state, instead of the power-down state, excepting the

time the record/playback operation is being

performed. In this case, the MSM6688 can be placed

in the power-down state by setting the RESET pin to

a high level. If it is desired to use the built-in LPF for

an external circuit, this standby mode must be

selected by applying a high level to the PDMD pin.

Used to select the voice triggered starting that starts recording

14

VDS

I

when the voice input exceeds the preset amplitude. A high input

level on this pin enables the voice triggered starting circuit.

Outputs a high level while the record/playback operation is being

51

MON

O

performed.

Output pin to indicate the enable or disable state of the operation

for specifying a phrase. When continuous ROM playback is

52

NAR

O

performed, the next phrase can be specified after verifying that the

NAR pin becomes high.

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