PIC16C55XA Просмотр технического описания (PDF) - Microchip Technology
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PIC16C55XA Datasheet PDF : 96 Pages
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PIC16C55X(A)
TABLE 3-1: PIC16C55X(A) PINOUT DESCRIPTION
Name
DIP
SOIC
Pin #
SSOP
Pin #
I/O/P
Type
Buffer
Type
Description
OSC1/CLKIN
OSC2/CLKOUT
MCLR/VPP
16
18
15
17
4
4
I
ST/CMOS Oscillator crystal input/external clock source input.
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.
I/P
ST Master clear (reset) input/programming voltage input.
This pin is an active low reset to the device.
PORTA is a bi-directional I/O port.
RA0
17
19
I/O
ST
RA1
18
20
I/O
ST
RA2
1
1
I/O
ST
RA3
RA4/T0CKI
RB0/INT
RB1
2
2
I/O
ST
3
3
I/O
ST Can be selected to be the clock input to the Timer0
timer/counter. Output is open drain type.
PORTB is a bi-directional I/O port. PORTB can be
software programmed for internal weak pull-up on all
inputs.
6
7
I/O TTL/ST(1)
RB0/INT can also be selected as an external
interrupt pin.
7
8
I/O
TTL
RB2
8
9
I/O
TTL
RB3
9
10
I/O
TTL
RB4
10
11
I/O
TTL
Interrupt on change pin.
RB5
RB6
RB7
VSS
VDD
11
12
12
13
13
14
5
5,6
14 15,16
I/O
TTL
I/O TTL/ST(2)
I/O TTL/ST(2)
Interrupt on change pin.
Interrupt on change pin. Serial programming clock.
Interrupt on change pin. Serial programming data.
P
— Ground reference for logic and I/O pins.
P
— Positive supply for logic and I/O pins.
Legend:
O = output
I/O = input/output P = power
— = Not used
I = Input
ST = Schmitt Trigger input
TTL = TTL input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
Note 2: This buffer is a Schmitt Trigger input when used in serial programming mode.
© 1997 Microchip Technology Inc.
Preliminary
DS40143B-page 11
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