PIC16F1828-I/SS Microchip Technology, PIC16F1828-I/SS Datasheet - Page 163

• Manufacturer Part Number: PIC16F1828-I/SS
• Description: IC PIC MCU 8BIT 14KB FLSH 20SSOP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1828-I/SS

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP (0.200", 5.30mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 18
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 256Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.0
The Digital-to-Analog Converter supplies a variable
voltage reference, ratiometric with the input source,
with 32 selectable output levels.
The input of the DAC can be connected to:
• External V
• V
• FVR (Fixed Voltage Reference)
The output of the DAC can be configured to supply a
reference voltage to the following:
• Comparator positive input
• ADC input channel
• DACOUT pin
The Digital-to-Analog Converter (DAC) can be enabled
by setting the DACEN bit of the DACCON0 register.
17.1
The DAC has 32 voltage level ranges. The 32 levels
are set with the DACR<4:0> bits of the DACCON1
register.
The DAC output voltage is determined by the following
equations:
EQUATION 17-1:
17.2
The DAC output value is derived using a resistor ladder
with each end of the ladder tied to a positive and
negative voltage reference input source. If the voltage
of either input source fluctuates, a similar fluctuation will
result in the DAC output value.
The value of the individual resistors within the ladder
can
Specifications”.
 2010 Microchip Technology Inc.
V
Note:
OUT
DD
=
supply voltage
be


DIGITAL-TO-ANALOG
CONVERTER (DAC) MODULE
Output Voltage Selection
Ratiometric Output Level

V
V
V
SOURCE
REF
found
SOURCE
REF
+. V
pins
+ V
SOURCE
+ can equal FVR Buffer 2, V
–
in
DAC OUTPUT VOLTAGE
SOURCE
- can equal V
Section 30.0
-


DACR<4:0>
------------------------------ -
2 5
SS
or V
“Electrical


REF
+ V
DD
-.
SRC
or
Preliminary
-
17.3
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.
an example buffering technique.
PIC16(L)F1824/1828
DAC Voltage Reference Output
Figure 17-2
DS41419B-page 163
shows