MSM7718-01 データシートの表示（PDF） - Oki Electric Industry

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MSM7718-01

Echo Canceler with ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7718-01

Direct Access to Default Store Memory (See Figs.8-1, 8-2)

The contents of the default store memory can be

changed (e.g., to change tone detection levels

and tone generation frequencies) in the initial

mode (CR0-B3 to CR0-B0="0000").

Refer to the following procedure:

1.Set the default value store memory address

(CR11, CR12).

Set the write data into CR16 and CR17.

2.When writing data to the upper byte, set the

DMWR (change default) command (CR10-B3

to CR10-B0="1101").

Default Value Store Memory

Direct Access

Set address.

Set write data.

(1) CR12, CR11

CR16, CR17

Set command to

write in upper byte

(DMWR)

(2) CR10

Yes Continue to

write?

No

END

Figure 8-1 Flow Chart of Default Value Store

Memory Direct Access

Default Value Store Memory

Data (CR16, CR17)

Address (CR11, CR12)

Figure 8-2 Memory Map for Default Value Store Memory Direct Access

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