MSM7617 Evaluation Board
¡ Semiconductor
18
1. Set the evaluation board.
Set the COMMON MODE SW’s I/O Mode (IOM1, IOM0) to 2-channel serial I/O mode
(IOM1,0 = 0,1).
Set JP1, JP2, JP3, and JP4 to PCM mode.
Set JP9 and JP12 to EXT mode.
SYNC2 is not used in serial I/O mode, so set the JP11 to PCM mode or EXT mode.
Fix JP10 to SYNC1 mode and JP13 to X’tal mode.
2. Referring to the diagram, connect the equipment under test to the evaluation board.
Serial I/O mode is a multiplexed mode for input/output of continuous serial data on two
channels. If data is not continuous, test with parallel I/O mode.
Use wires as short as possible to connect the equipment under test to the evaluation board.
If the connecting lines are long, noise or other factors can cause malfunction.
3. Apply power and reset the test system, set the mode switches, and start evaluation.
Usage Example 3: 1-Channel Cross-Connected Mode
This mode confirms the effectiveness of using both acoustic and line echo cancellation for hands-
free telephone sets.
Settings: cross-connected mode, analog impedance, internal synchronization
VR1
COMMON
MODE SW
IOM1 = 1 (OPEN)
IOM0 = 0 (ON)
ch1
MODE SW
ch2
MODE SW
|
VR2
VR3
JP1
JP2
JP10
JP9
JP13
+5 V
Evaluation Board
AFF
ch1
GND
ROUT1
SIN1
ROUT2
SIN2
JP12
JP11
ch1 RST
VR4
ch2 RST
JP3
JP19
JP20
JP4
AFF
MSM7617
Analog
Impedance
Level Adjuster
Microphone
Amp
Speaker Amp
ch2
SIN2
ROUT2
ROUT1
SIN1
Line Echo
Acoustic Echo
+
{
+
CODEC
CODEC