W741E260 Datasheet, PDF (5/94 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

W741E260
PIN DESCRIPTION
SYMBOL
XIN1
XOUT1
XIN2
XOUT2
RA0 to RA3
RB0 to RB3
RC0 to RC3
RD0 to RD3
RE0 to RE3
MFP
RES
INT
SEG0 to
SEG31
COM0 to
COM3
I/O
FUNCTION
I Input pin for main-oscillator.
Connected to crystal or resistor to generate system clock by code option.
O Output pin for main-oscillator.
Connected to crystal or resistor to generate system clock by code option.
I Input pin for sub-oscillator. Connected to 32.768 KHz crystal.
O Output pin for sub-oscillator with internal oscillation capacitor. Connected
to 32.768 KHz crystal.
I/O Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
I/O Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
I 4-bit port for input only.
Each pin has an independent interrupt capability.
I 4-bit port for input only.
O Output port only.
This port provides high sink current to drive LEDs.
O Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
I System reset pin with pull-high resistor.
I External interrupt pin with pull-high resistor. This pin is bonding option for
the W741C250 body.
O LCD segment output pins.
Also can be used as DC output ports specified by option codes.
O LCD common signal output pins.
COM0
COM1
COM2
COM3
Static
Used
Not Used
Not Used
Not Used
1/2 Duty
Used
Used
Not Used
Not Used
1/3 Duty
Used
Used
Used
Not Used
1/4 Duty
Used
Used
Used
Used
DH1, DH2
VDD1,
VDD2,
VDD3
The LCD alternating frequency can be selected by code option.
I Connection terminals for voltage doubler (halver) capacitor.
Positive (+) supply voltage terminal.
I _{Refer to Functional Description.}
Publication Release Date: March 1998
-5-
Revision A2