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參數(shù)資料
型號: W741E260
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT FLASH MICROCONTROLLER
中文描述: 4-BIT, FLASH, 4.19 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 5/94頁
文件大小: 554K
代理商: W741E260
W741E260
Publication Release Date: March 1998
- 5 -
Revision A2
PIN DESCRIPTION
SYMBOL
I/O
FUNCTION
XIN1
I
Input pin for main-oscillator.
Connected to crystal or resistor to generate system clock by code option.
XOUT1
O
Output pin for main-oscillator.
Connected to crystal or resistor to generate system clock by code option.
XIN2
I
Input pin for sub-oscillator. Connected to 32.768 KHz crystal.
XOUT2
O
Output pin for sub-oscillator with internal oscillation capacitor. Connected
to 32.768 KHz crystal.
RA0 to RA3
I/O
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
RB0 to RB3
I/O
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
RC0 to RC3
I
4-bit port for input only.
Each pin has an independent interrupt capability.
RD0 to RD3
I
4-bit port for input only.
RE0 to RE3
O Output port only.
This port provides high sink current to drive LEDs.
MFP
O
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
RES
I
System reset pin with pull-high resistor.
INT
I
External interrupt pin with pull-high resistor. This pin is bonding option for
the W741C250 body.
SEG0 to
SEG31
O
LCD segment output pins.
Also can be used as DC output ports specified by option codes.
COM0 to
COM3
O
LCD common signal output pins.
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.
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