PIC12F1822 MICROCHIP [Microchip Technology], PIC12F1822 Datasheet - Page 149

• Manufacturer Part Number: PIC12F1822
• Description: 8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

16.4
The DAC can be output to the DACOUT pin by setting
the DACOE bit of the DACCON0 register to ‘1’. Selecting
the DAC reference voltage for output on the DACOUT
pin automatically overrides the digital output buffer and
digital input threshold detector functions of that pin.
Reading the DACOUT pin when it has been configured
for DAC reference voltage output will always return a ‘0’.
Due to the limited current drive capability, a buffer must
be used on the DAC voltage reference output for
external connections to DACOUT. Figure 16-3 shows
an example buffering technique.
FIGURE 16-2:
 2010 Microchip Technology Inc.
DAC Voltage Reference Output
DACPSS<1:0>
FVR BUFFER2
DACLPS
DACEN
DIGITAL-TO-ANALOG CONVERTER BLOCK DIAGRAM
V
V
REF
V
V
REF
SS
DD
+
-
2
Digital-to-Analog Converter (DAC)
PIC12F/LF1822/16F/LF1823
Steps
Preliminary
V
32
V
SRC
SRC
+
-
R
R
R
R
R
R
R
R
5
(To Comparator, CSM and
DACR<4:0>
DAC
ADC Modules)
DACOUT
DACOE
DS41413A-page 149