ViewSonic VX712 - Page 22

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ViewSonic Corporation
Confidential - Do Not Copy VX712
NC 33 27 No connection
NC 34 28 No connection
NC 35 29 No connection
P1.7 36 30 General purpose I/O (Standard 8051/CMOS)
P1.6 37 31 General purpose I/O (Standard 8051/CMOS)
P1.5 38 32 General purpose I/O (Standard 8051/CMOS)
P1.4 39 33 General purpose I/O (Standard 8051/CMOS)
P1.3 40 34 General purpose I/O (Standard 8051/CMOS)
P1.2 41 35 General purpose I/O (Standard 8051/CMOS)
P1.1 42 36 General purpose I/O (Standard 8051/CMOS)
P1.0/ET2 43 37
General purpose I/O/External Counter/Timer2
(Standard 8051/CMOS)
VCC 44 38 3.3V power
TDA7496L(U201): The TDA7496L is a stereo 2W+2W class AB power amplifier
assembled in the @ Powerdip, driving speakers as low as 8
. The function of
each pin and the inside circuit diagram are as follows:
Block Diagram