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CF745 数据表(PDF) 12 Page - Microchip Technology

部件名 CF745
功能描述  EPROM/ROM-Based 8-Bit CMOS Microcontroller Series
PDF  217 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

CF745 数据表(HTML) 12 Page - Microchip Technology

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PIC16C5X
DS30453B-page 12
Preliminary
© 1998 Microchip Technology Inc.
TABLE 3-2:
PINOUT DESCRIPTION
- PIC16C55s, PIC16C57s, PIC16CR57s
Name
DIP, SOIC
No.
SSOP
No.
I/O/P
Type
Input
Levels
Description
RA0
RA1
RA2
RA3
6
7
8
9
5
6
7
8
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
Bi-directional I/O port
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
10
11
12
13
14
15
16
17
9
10
11
12
13
15
16
17
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
Bi-directional I/O port
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
18
19
20
21
22
23
24
25
18
19
20
21
22
23
24
25
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
Bi-directional I/O port
T0CKI
1
2
I
ST
Clock input to Timer0. Must be tied to VSS or VDD if not in use
to reduce current consumption.
MCLR
28
28
I
ST
Master clear (reset) input. This pin is an active low reset to the
device.
OSC1/CLKIN
27
27
I
ST
Oscillator crystal input/external clock source input.
OSC2/CLKOUT
26
26
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.
VDD
2
3,4
P
—
Positive supply for logic and I/O pins.
VSS
4
1,14
P
—
Ground reference for logic and I/O pins.
N/C
3,5
—
—
—
Unused, do not connect
Legend: I = input, O = output, I/O = input/output,
P = power, — = Not Used,
TTL = TTL input, ST = Schmitt Trigger input



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