W541E200 WINBOND [Winbond], W541E200 Datasheet - Page 5

• Manufacturer Part Number: W541E200
• Description: 4 BIT FLASH EPROM MICROCONTROLLER
• Manufacturer: WINBOND [Winbond]

PIN DESCRIPTION
Note: There are internal pull-high resistors in these pins of W741C20X.
XIN
XOUT
RA0−RA2,
RA3 (DATA)
RB0−RB3
RC0−RC3
RD0−RD3
RE0/DOUT,
RE1/CLKO,
RE2/DIN,
RE3/CLKI
MFP
V
V
INT (MODE)
RES
DD
SS
SYMBOL
(V
PP
)
1
1
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
I
Input pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
External 10~20pF capacitor uses to get accurate freq in crystal mode.
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.
Input/Output port.
Input/output mode specified by port mode 1 register (PM1). When used as
output port, can provide high sink current for driving LED.
Input/Output port.
Input/output mode specified by port mode 2 register (PM2). When used as
output port, can provide high sink current for driving LED.
Input/Output port.
Input/output mode specified by port mode 4 register (PM4). Each pin has
an independent interrupt capability in input mode.
Input/Output port.
Input/output mode specified by port mode 5 register (PM5).
Special input/output port.
This port can be configured by software to act as the output of internal
port RT or the serial I/O port. When used as output port, can provide high
sink current for driving LED.
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
External interrupt pin.
This pin must be tied to V
and floating input pin.
System reset pin.
This pin must be tied to V
used to reset this chip. It is a low active and floating input pin.
Positive power supply (+).
Negative power supply (-).
- 5 -
DD
DD
through an external resistor. It is a low active
through an external resistor when it is not
FUNCTION
Preliminary W541E20X
Publication Release Date: June 2003
Revision A2