ViewSonic VA712b-2, Service Manual

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ViewSonic Corporation
P3.3/INT1 15 9
General purpose I/O/External interrupt 1(Standard 8051)
P3.4/T0 16 10
General purpose I/O/T0 Ext. Counter/Timer 0(Standard8051)
P3.5/T1 17 11
General purpose I/O/T1 Ext. Counter/Timer 1(Standard8051)
P7.6/CLKO2 18 12
General purpose I/O/Clock out 2 (CMOS)
P7.7 19 13
General purpose I/O (CMOS)
X2 20 14
Crystal Out
X1 21 15
Crystal In
VSS 22 16
Ground
P6.0/AD0 24 18 General purpose I/O(COMS)/6-bit ADC channel 0 input
P6.1/AD1 25 19 General purpose I/O(COMS)/6-bit ADC channel 1 input
P6.2/AD2 26 20 General purpose I/O(COMS)/6-bit ADC channel 2 input
P6.3/AD3 27 21 General purpose I/O(COMS)/6-bit ADC channel 3 input
P6.4 28 22 General purpose I/O(COMS)
P6.5 29 23 General purpose I/O(COMS)
P6.6/CLKO1 30 24 General purpose I/OCLKO1(COMS)
P6.7 31 25 General purpose I/O(COMS)
VSYNC 32 26 VSYNC input
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 UTC TDA7496L is a stereo 2W+2W class AB power amplifier,
specially designed for high quality sound, TV and Monitor applications.
Features of the UTC TDA7496L include linear volume control, Stand-by and
mute functions.
Pin Function