w83l950d Winbond Electronics Corp America, w83l950d Datasheet - Page 72
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w83l950d
Manufacturer Part Number
w83l950d
Description
Peripheral Personal Computer Keyboard Controller
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83L950D.pdf
(105 pages)
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Channel Selector
The channel selector selects one of ports GP60/AD0 to GP67/AD7, and inputs the voltage to the
comparator.
Comparator and Control Circuit
The comparator and control circuit compares an analog input voltage with the comparison voltage, and
then stores the result in the A-D conversion registers 1,2. When an A-D conversion is completed, the
control circuit sets the A-D conversion completion bit and the A-D interrupt request bit to '1".
16.1 AD/DA control register 0(ADCON)
SFR address
Default value
Bit 7: DA1 output enable bit
Bit 6: DA0 output enable bit
Bit 5: PWM1 output pin selection bit
Bit 4: PWM0 output pin selection bit
Bit 3: A-D conversion complete bit
Bit 2-0: Analog input pin selection bits
The AD/DA control register controls the A-D conversion process. Bits 0 to 2 select a specific
analog input pin. Bit 3 signals the completion of an A-D conversion. The value of this bit
0: A1 output disabled.
1: A1 output enable.
0: DA0 output disabled.
1: DA0 output enable.
0: P57 / PWM11
1: P31 / PWM10
0: P56 / PWM01
1: P30 / PWM00
0: conversion in progress.
1: conversion completed.
000: P60/AD0
001: P61/AD1
010: P62/AD2
011: P63/AD3
100: P64/AD4
101: P65/AD5
110: P66/AD6
110: P67/AD7
0xE2
0000,1000b
- 63 -
Publication Release Date: June 23, 2003
W83L950D
Revision 1.0
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