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CF745 数据表(PDF) 11 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) 11 Page - Microchip Technology

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© 1998 Microchip Technology Inc.
Preliminary
DS30453B-page 11
PIC16C5X
TABLE 3-1:
PINOUT DESCRIPTION - PIC16C52, PIC16C54s, PIC16CR54s, PIC16C56s,
PIC16CR56s, PIC16C58s, PIC16CR58s
Name
DIP, SOIC
No.
SSOP
No.
I/O/P
Type
Input
Levels
Description
RA0
RA1
RA2
RA3
17
18
1
2
19
20
1
2
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
6
7
8
9
10
11
12
13
7
8
9
10
11
12
13
14
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
3
3
I
ST
Clock input to Timer0. Must be tied to VSS or VDD, if not in
use, to reduce current consumption.
MCLR/VPP
4
4
I
ST
Master clear (reset) input/programming voltage input. This
pin is an active low reset to the device. Voltage on the
MCLR/VPP pin must not exceed VDD to avoid unintended
entering of programming mode.
OSC1/CLKIN
16
18
I
ST
Oscillator crystal input/external clock source input.
OSC2/CLKOUT
15
17
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
14
15,16
P
—
Positive supply for logic and I/O pins.
VSS
5
5,6
P
—
Ground reference for logic and I/O pins.
Legend: I = input, O = output, I/O = input/output,
P = power, — = Not Used, TTL = TTL input,
ST = Schmitt Trigger input



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