msm7718-01 Oki Semiconductor, msm7718-01 Datasheet - Page 13

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

MSM7718-01
¡ Semiconductor
D7 to D0 (reserved for external memory I/F)
Output of write data, and input-output of read data.
A20 to A0 (reserved for external memory I/F)
External memory address output.
WE (reserved for external memory I/F)
Output for write control .
OE (reserved for external memory I/F)
Output for read control.
CS1, CS2 (reserved for external memory I/F)
Chip select output.
RP (reserved for external memory I/F)
Reset/power-down control output for external memory.
TSTI1, TSTI2, TSTI3, TSTI4
Input for test.
Normally fix these pins to logic “0”.
TSTI4
Input for mode select.
Fix this pin to logic “0” for normal speech mode.
Fix this pin to logic “1” for line echo canceler expansion mode. Refer to the explanation of CR0
for the operation mode.
TSTO
Output for test.
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