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參數資料
| 型號： | W541E261 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4BIT MICROCONTROLLER, 2K 】16 ROM, 128 】4 RAM 128 -DOT LCD |
| 中文描述： | 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數： | 7/13頁 |
| 文件大小： | 294K |
| 代理商： | W541E261 |
W541E/C261 DATA SHEET
Publication Release Date: June 12, 2007
- 7 -
Revision A1
3.3 PAD DESCRIPTION
SYMBOL
I/O
FUNCTION
XIN1
I
Input pin for oscillator.
Connected to crystal or resistor to generate system clock by code option. External
15~20pF capacitor uses to get accurate freq in crystal mode.
XOUT1
O
Output pin for oscillator
Connected to crystal or resistor to generate system clock by code option. 20PF
capacitor is built in internal for crystal mode.
XIN2
I
Input pin for sub-oscillator. Connected to a 32.768 KHz crystal. External 15~20pF
capacitor uses to get accurate freq in crystal mode..
XOUT2
O
oscillator. Connected Output pin for sub to a 32.768 KHz crystal. 20PF capacitor is
built in internal for crystal mode.
RA0
RA3
I/O
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
RB0
RB3
I/O
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
RC0
RC3
I
4-bit port for input only.
Each pin has an independent interrupt capability.
RD0
RD3
I
4-bit port for input only.
RE0
RE3
O This port provides high sink current to drive LEDs.
/INT
I
External interrupt pin with pull-high resistor. This pin is bonding option for
the W541C250 body. Only for W541E261.
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.
SEG0
SEG31
O
LCD segment output pins.
Can also be used as DC output ports specified by code option.
COM0
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.
VDD1, VDD2,
VDD3
I
Positive (+) supply voltage terminal.
Refer to Functional Description.
VDD
I
Positive power supply (+).
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