msm7718-01 Oki Semiconductor, msm7718-01 Datasheet - Page 36

• Manufacturer Part Number: msm7718-01
• Description: Echo Canceler With Adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Direct Access to Default Store Memory (See Figs.8-1, 8-2)
Figure 8-2 Memory Map for Default Value Store Memory Direct Access
The contents of the default store memory can be
Refer to the following procedure:
changed (e.g., to change tone detection levels
and tone generation frequencies) in the initial
mode (CR0-B3 to CR0-B0="0000").
1.Set the default value store memory address
2.When writing data to the upper byte, set the
(CR11, CR12).
Set the write data into CR16 and CR17.
DMWR (change default) command (CR10-B3
to CR10-B0="1101").
Data (CR16, CR17)
Default Value Store Memory
Figure 8-1 Flow Chart of Default Value Store
Address (CR11, CR12)
Memory Direct Access
Yes
Default Value Store Memory
write in upper byte
Set command to
Set write data.
Direct Access
Set address.
Continue to
(DMWR)
write?
END
No
(1) CR12, CR11
(2) CR10
MSM7718-01
CR16, CR17
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