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參數資料
型號: W7411240
廠商: WINBOND ELECTRONICS CORP
英文描述: 4-BIT Microcontroller(4位的微控制器)
中文描述: 4位微控制器(第4位的微控制器)
文件頁數: 3/39頁
文件大小: 424K
代理商: W7411240
W741L240
Publication Release Date: May 1999
- 3 -
Revision A1
PIN DESCRIPTION
SYMBOL
XIN
I/O
I
FUNCTION
Input pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
Output pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
4-bit port for input only.
Each pin has an independent interrupt capability.
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
System reset pin with pull-high resistor.
XOUT
O
RA0
RA3
I/O
RB0
RB3
I/O
RC0
RC3
I
MFP
O
RES
SEG0
SEG23
I
O
LCD segment output pins.
Also can be used as DC output ports specified by code option.
LCD common signal output pins.
COM0
COM3
O
Static
COM0
COM1
COM2
COM3
Used
Not Used
1/2 Duty
Not Used
Not Used
Not Used
Not Used
1/3 Duty
Not Used
1/4 Duty
Used
Used
Used
Used
Used
Used
Used
Used
Used
The LCD alternating frequency can be selected by code option.
DH1, DH2
I
Connection terminals for voltage doubler (halver) capacitor.
V
DD1
, V
DD2
,
V
DD3
I
Positive (+) supply voltage terminal.
Refer to Functional Description.
V
DD
I
Positive power supply (+).
V
SS
I
Negative power supply (-).
相關PDF資料
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