參數(shù)資料
型號： 16F871
廠商： Microchip Technology Inc.
英文描述： CAT 5E CROSSOVER PATCH CORD CABLE GREEN 6 FT
中文描述： 28/40-Pin 8位CMOS閃存微控制器
文件頁數(shù)： 8/156頁
文件大?。?/td> 2816K
代理商： 16F871
PIC16F870/871
DS30569A-page 8
Preliminary
1999 Microchip Technology Inc.
TABLE 1-2:
PIC16F871 PINOUT DESCRIPTION
Pin Name
DIP
Pin#
PLCC
Pin#
QFP
Pin#
I/O/P
Type
Buffer
Type
Description
OSC1/CLKIN
13
14
30
I
ST/CMOS
(4)
Oscillator crystal input/external clock source input.
OSC2/CLKOUT
14
15
31
O
—
Oscillator crystal output. Connects to crystal or resonator in
crystal oscillator mode. In RC mode, OSC2 pin outputs CLK-
OUT which has 1/4 the frequency of OSC1, and denotes the
instruction cycle rate.
MCLR/V
PP
/THV
1
2
18
I/P
ST
Master clear (reset) input or programming voltage input or high
voltage test mode control. This pin is an active low reset to the
device.
PORTA is a bi-directional I/O port.
RA0/AN0
2
3
19
I/O
TTL
RA0 can also be analog input0
RA1/AN1
3
4
20
I/O
TTL
RA1 can also be analog input1
RA2/AN2/V
REF
-
4
5
21
I/O
TTL
RA2 can also be analog input2 or negative analog
reference voltage
RA3/AN3/V
REF
+
5
6
22
I/O
TTL
RA3 can also be analog input3 or positive analog
reference voltage
RA4/T0CKI
6
7
23
I/O
ST
RA4 can also be the clock input to the Timer0 timer/
counter. Output is open drain type.
RA5/AN4
7
8
24
I/O
TTL
RA5 can also be analog input4
PORTB is a bi-directional I/O port. PORTB can be software
programmed for internal weak pull-up on all inputs.
RB0/INT
33
36
8
I/O
TTL/ST
(1)
RB0 can also be the external interrupt pin.
RB1
34
37
9
I/O
TTL
RB2
35
38
10
I/O
TTL
RB3/PGM
36
39
11
I/O
TTL/ST
(1)
RB3 can also be the low voltage programming input
RB4
37
41
14
I/O
TTL
Interrupt on change pin.
RB5
38
42
15
I/O
TTL
Interrupt on change pin.
RB6/PGC
39
43
16
I/O
TTL/ST
(2)
Interrupt on change pin or In-Circuit Debugger pin. Serial
programming clock.
RB7/PGD
40
44
17
I/O
TTL/ST
(2)
Interrupt on change pin or In-Circuit Debugger pin. Serial
programming data.
PORTC is a bi-directional I/O port.
RC0/T1OSO/T1CKI
15
16
32
I/O
ST
RC0 can also be the Timer1 oscillator output or a Timer1
clock input.
RC1/T1OSI
16
18
35
I/O
ST
RC1 can also be the Timer1 oscillator input
RC2/CCP1
17
19
36
I/O
ST
RC2 can also be the Capture1 input/Compare1 output/
PWM1 output.
RC3
18
20
37
I/O
ST
RC4
23
25
42
I/O
ST
RC5
24
26
43
I/O
ST
RC6/TX/CK
25
27
44
I/O
ST
RC6 can also be the USART Asynchronous Transmit or
Synchronous Clock.
RC7/RX/DT
26
29
1
I/O
ST
RC7 can also be the USART Asynchronous Receive or
Synchronous Data.
Legend:
I = input
O = output
— = Not used
I/O = input/output
TTL = TTL input
P = power
ST = Schmitt Trigger input
Note 1:
This buffer is a Schmitt Trigger input when configured as an external interrupt or LVP mode.
This buffer is a Schmitt Trigger input when used in serial programming mode.
This buffer is a Schmitt Trigger input when configured as general purpose I/O and a TTL input when used in the Parallel Slave
Port mode (for interfacing to a microprocessor bus).
This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise.
2:
3:
4:
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