PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 366

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
19.7
DS31019A-page 19-6
Connection Considerations
The Voltage Reference Module operates independently of the comparator module. The output of
the reference generator may be connected to the V
and the VROE bit (VRCON<6>) is set. Enabling the Voltage Reference output onto the V
with an input signal present will increase current consumption. Configuring the V
output with V
The V
drive capability, a buffer must be used in conjunction with the Voltage Reference output for exter-
nal connections to V
Figure 19-2:
REF
PIC16CXXX
V
Note 1: R is the Voltage Reference Output Impedance and is dependent upon the
REF
pin can be used as a simple D/A output with limited drive capability. Due to the limited
REF
Module
Voltage Reference Output Buffer Example
enabled will also increase current consumption.
Voltage Reference Configuration VRCON<3:0> and VRCON<5>.
R
REF
(1)
.
Figure 19-2
ANx
shows an example buffering technique.
•
REF
pin if the corresponding TRIS bit is set
+
–
1997 Microchip Technology Inc.
•
V
REF
Output
REF
as a digital
REF
pin