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PIC16F1847 bảng dữ liệu(PDF) 155 Page - Microchip Technology

tên linh kiện PIC16F1847
Giải thích chi tiết về linh kiện  18/20/28-Pin Flash Microcontrollers with nanoWatt XLP Technology
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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 2011 Microchip Technology Inc.
Preliminary
DS41453B-page 155
PIC16(L)F1847
17.4
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 17-3 shows
an example buffering technique.
FIGURE 17-2:
DIGITAL-TO-ANALOG CONVERTER BLOCK DIAGRAM
DACR<4:0>
R
VREF-
DACNSS
R
R
R
R
R
R
32
DAC
DACOUT
5
(To Comparator and
ADC Modules)
DACOE
VDD
VREF+
DACPSS<1:0>
2
DACEN
Steps
Digital-to-Analog Converter (DAC)
FVR BUFFER2
R
VSRC-
VSRC+
VSS
DACLPS



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