PIC12F1822T-I/SL 데이터 시트보기 (PDF) - Microchip Technology

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PIC12F1822T-I/SL

8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC12F/LF1822/16F/LF1823

16.4 DAC Voltage Reference Output

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:

DIGITAL-TO-ANALOG CONVERTER BLOCK DIAGRAM

FVR BUFFER2

VDD

VREF+

DACPSS<1:0> 2

DACEN

DACLPS

VREF-

VSS

Digital-to-Analog Converter (DAC)

VSRC+

R

R

R

R

R

32

Steps

R

R

R

5

DACR<4:0>

DAC

(To Comparator, CSM and

ADC Modules)

DACOUT

DACOE

VSRC-

 2010 Microchip Technology Inc.

Preliminary

DS41413A-page 149

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