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參數資料
型號: W741L260
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT MICROCONTROLLER
中文描述: 4-BIT, MROM, 1 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數: 4/90頁
文件大小: 480K
代理商: W741L260
W741L260
- 4 -
PIN DESCRIPTION
SYMBOL
XIN1
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 pin for sub-oscillator. Connected to a 32.768 KHz crystal.
Output pin for sub-oscillator. Connected to a 32.768 KHz crystal.
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.
4-bit port for input only.
XOUT1
O
XIN2
XOUT2
RA0
RA3
I
O
I/O
RB0
RB3
I/O
RC0
RC3
I
RD0
RD3
RE0
RE3
I
O
Output port only.
This port provides high sink current.
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.
MFP
O
RES
SEG0
SEG31
I
O
LCD segment output pins.
Can also 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.
Connection terminals for voltage doubler (halver) capacitor.
Positive (+) supply voltage terminal.
Refer to Functional Description.
Positive power supply (+).
Negative power supply (-).
DH1, DH2
V
DD1
, V
DD2,
V
DD3
I
I
V
DD
V
SS
I
I
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