Tutorial/Demo
DAC module
enable
DACON0
DAC output
enable
shows
DAC Output
enabled
Arbitrary
Waveform
button
Figure 3.3: DAC Setup Initial Display
The DAC module is controlled by means of four Special Function registers:
? DACON0
? DAC
? TRISB
? ANSEL.
The DACON0 register controls three items:
? Enable/disable the DAC
? Enable DAC output on RB1/AN5/V DAC pins (providing ANSEL<5>=1
and TRISB<1>=1)
? Selection of reference voltage.
The DAC register holds the digital value to be converted to analog output.
Note:
DACON0 register shows all zeros before the DAC is enabled and
configured.
The TRISB and the ANSEL registers are the primary controls for the configu-
ration of PORTB pins.
? 2001 Microchip Technology Inc.
DS41178A-page 25
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