msm7617 Oki Semiconductor, msm7617 Datasheet - Page 8

• Manufacturer Part Number: msm7617
• Description: 2-channel Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
PIN DESCRIPTIONS (Continued)
Pin
20
22
23
Symbol
ROUT1
RIN1
SIN1
Type
O
I
I
PCM data input pin. Pin use changes depending on the setting of the IOM
pins (refer to the block diagram).
In 2-channel parallel I/O mode, this pin becomes SIN for channel 1 and
inputs the PCM signal synchronous with SYNC1. In 2-channel serial I/O
mode, this pin sequentially inputs SIN as a multiplexed PCM signal from
channel 1 and channel 2 synchronous with SYNC1. In 1-channel cross-
connected mode, this pin becomes the cross-connected SIN pin for channel
1, and inputs the PCM signal synchronous with SYNC1.
Data is captured on the falling edge of SCK.
PCM data output pin. Output signal changes depending on the setting of
the IOM pins (refer to the block diagram).
Data is always output on the rising edge of SCK. This pin becomes high
impedance while there is no data or during reset.
In 2-channel parallel I/O mode, this pin becomes ROUT for channel 1 and
outputs the PCM signal synchronous with SYNC1. In 2-channel serial I/O
mode, this pin outputs the ROUT signal as a multiplexed PCM signal of ROUT
signals for channel 1 and channel 2 synchronous with SYNC1.
In 1-channel cross-connected mode, this pin becomes the cross-connected
ROUT pin for channel 1, and outputs the PCM signal synchronous with SYNC1.
PCM data input pin. Pin use changes depending on the setting of the IOM
pins (refer to the block diagram).
In 2-channel parallel I/O mode, this pin becomes RIN for channel 1 and
inputs the PCM signal synchronous with SYNC1. In 2-channel serial I/O
mode, this pin sequentially inputs RIN as a multiplexed PCM signal from
channel 1 and channel 2 synchronous with SYNC1. In 1-channel cross-
connected mode, this pin is not used, and should be fixed at "L".
Data is captured on the falling edge of SCK.
Description
MSM7617
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