PIC16LC72-20SS 查看數據表（PDF） - Microchip Technology
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PIC16LC72-20SS Datasheet PDF : 288 Pages
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PIC16C7X
TABLE 3-3: PIC16C74/74A/77 PINOUT DESCRIPTION
Pin Name
DIP PLCC QFP I/O/P
Pin# Pin# Pin# 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
CLKOUT which has 1/4 the frequency of OSC1, and
denotes the instruction cycle rate.
MCLR/VPP
1
2
18 I/P
ST
Master clear (reset) input or programming voltage input.
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
4
5
21 I/O
TTL
RA2 can also be analog input2
RA3/AN3/VREF
5
6
22 I/O
TTL
RA3 can also be analog input3 or 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/SS/AN4
7
8
24 I/O
TTL
RA5 can also be analog input4 or the slave select for
the synchronous serial port.
RB0/INT
33
36
PORTB is a bi-directional I/O port. PORTB can be software
programmed for internal weak pull-up on all inputs.
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
36
39
11 I/O
TTL
RB4
37
41
14 I/O
TTL
Interrupt on change pin.
RB5
38
42
15 I/O
TTL
Interrupt on change pin.
RB6
39
43
16
I/O
TTL/ST(2)
Interrupt on change pin. Serial programming clock.
RB7
40
44
17
I/O
TTL/ST(2)
Interrupt on change pin. Serial programming data.
Legend:
Note 1:
2:
3:
4:
I = input O = output
I/O = input/output
P = power
— = Not used
TTL = TTL input
ST = Schmitt Trigger input
This buffer is a Schmitt Trigger input when configured as an external interrupt.
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.
© 1997 Microchip Technology Inc.
DS30390E-page 15
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