参数资料
型号: PIC16C662T-20I/L
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 24/136页
文件大小: 634K
代理商: PIC16C662T-20I/L
PIC16C64X & PIC16C66X
DS30559A-page 12
Preliminary
1996 Microchip Technology Inc.
TABLE 3-1:
PIC16C641/642 PINOUT DESCRIPTION
Name
Pin #
I/O/P
Type
Buffer
Type
Description
OSC1/CLKIN
9
I
ST/CMOS Oscillator crystal input or external clock source input.
OSC2/CLKOUT
10
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
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
I/O
ST
Analog comparator input.
RA1/AN1
3
I/O
ST
Analog comparator input.
RA2/AN2/VREF
4
I/O
ST
Analog comparator input or VREF output.
RA3/AN3
5
I/O
ST
Analog comparator input or comparator output.
RA4/T0CKI
6
I/O
ST
Can be selected to be the clock input to the Timer0 timer/counter
or a comparator output. Output is open drain type.
RA5
7
I/O
ST
PORTB is a bi-directional I/O port. PORTB can be software pro-
grammed for internal weak pull-ups on all inputs.
RB0/INT
21
I/O
TTL/ST(1)
RB0 can also be selected as an external interrupt pin.
RB1
22
I/O
TTL
RB2
23
I/O
TTL
RB3
24
I/O
TTL
RB4
25
I/O
TTL
Interrupt on change pin.
RB5
26
I/O
TTL
Interrupt on change pin.
RB6
27
I/O
TTL/ST(2)
Interrupt on change pin. Serial programming clock.
RB7
28
I/O
TTL/ST(2)
Interrupt on change pin. Serial programming data.
PORTC is a bi-directional I/O port.
RC0
11
I/O
ST
RC1
12
I/O
ST
RC2
13
I/O
ST
RC3
14
I/O
ST
RC4
15
I/O
ST
RC5
16
I/O
ST
RC6
17
I/O
ST
RC7
18
I/O
ST
VSS
8,19
P
Ground reference for logic and I/O pins.
VDD
20
P
Positive supply for logic and I/O pins.
Legend:
O = output
I/O = input/output
P = power
I = input
— = not used
ST = Schmitt Trigger input
TTL = TTL input
Note 1: This buffer is a Schmitt Trigger input when congured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in serial programming mode.
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