參數(shù)資料
型號(hào)： MCV18ET-I/SO
元件分類(lèi)： 微控制器/微處理器
英文描述： FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO18
封裝： 7.50 MM, LEAD FREE, SOIC-18
文件頁(yè)數(shù)： 87/108頁(yè)
文件大小： 1509K
代理商： MCV18ET-I/SO
MCV18E
DS41399A-page 8
2009 Microchip Technology Inc.
TABLE 1-1:
MCV18E PINOUT DESCRIPTION
Name
Function
Input Type
Output Type
Description
MCLR/VPP
MCLR
ST
—
Master clear (Reset) input. This pin is an active-low Reset to
the device.
VPP
P
—
Programming voltage input
OSC1/CLKIN
OSC1
XTAL
—
Oscillator crystal input
CLKIN
CMOS
—
External clock source input
CLKIN
ST
—
RC Oscillator mode
OSC2/CLKOUT
OSC2
XTAL
—
Oscillator crystal output. Connects to crystal or resonator in
Crystal Oscillator mode.
CLKOUT
—
CMOS
In RC mode, OSC2 pin outputs CLKOUT which has 1/4 the
frequency of OSC1, and denotes the instruction cycle rate.
RA0/AN0
RA0
TTL
CMOS
Bidirectional I/O
AN0
AN
—
Analog Channel 0 input
RA1/AN1
RA1
TTL
CMOS
Bidirectional I/O
AN1
AN
—
Analog Channel 1 input
RA2/AN2
RA2
TTL
CMOS
Bidirectional I/O
AN2
AN
—
Analog Channel 2 input
RA3/AN3/VREF
RA3
TTL
CMOS
Bidirectional I/O
AN3
AN
—
Analog Channel 3 input
VREF
AN
—
A/D reference voltage input
RA4/T0CKI
RA4
ST
OD
Bidirectional I/O. Open drain when configured as output.
T0CKI
ST
—
Timer0 external clock input
RB0/INT/ECCPAS2
RB0
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up.
INT
ST
—
External Interrupt
ECCPAS2
ST
—
ECCP Auto-Shutdown pin
RB1/T1OSO/T1CKI
RB1
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up.
T1OSO
—
XTAL
Timer1 oscillator output. Connects to crystal in Oscillator
mode.
T1CKI
ST
—
Timer1 external clock input
RB2/T1OSI
RB2
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up.
T1OSI
XTAL
—
Timer1 oscillator input. Connects to crystal in Oscillator mode.
RB3/CCP1/P1A
RB3
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up.
CCP1
ST
CMOS
Capture1 input, Compare1 output, PWM1 output.
P1A
—
CMOS
PWM P1A output
RB4/ECCPAS0
RB4
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up. Interrupt-on-
change.
ECCPAS0
ST
—
ECCP Auto-Shutdown pin
RB5/P1B
RB5
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up. Interrupt-on-
change.
P1B
—
CMOS
PWM P1B output
RB6/P1C
RB6
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up. Interrupt-on-
change. ST input when used as ICSP programming clock.
P1C
—
CMOS
PWM P1C output
RB7/P1D
RB7
TTL
CMOS
Bidirectional I/O. Programmable weak pull-up. Interrupt-on-
change. ST input when used as ICSP programming data.
P1D
—
CMOS
PWM P1D output
VSS
P
—
Ground reference for logic and I/O pins.
VDD
P
—
Positive supply for logic and I/O pins.
Legend:
I
= Input
AN
= Analog input or output
OD
= Open drain
O = Output
TTL
= TTL compatible input
ST
= Schmitt Trigger input with CMOS levels
P = Power
XTAL = Crystal
CMOS = CMOS compatible input or output
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