W541E204G Datasheet, PDF (5/14 Pages) Nuvotem Talema – Oscillation frequency up to 4 MHz , Crystal or RC oscillator is selected by mask code option

W541C20X
5. PIN DESCRIPTION
SYMBOL
XIN
XOUT
RA0−RA3
RB0−RB3
RC0−RC3
RD0−RD3
RE0/DOUT
RE1/CLKO
RE2/DIN
RE3/CLKI
MFP
I/O
FUNCTION
Input pin for oscillator.
I 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.
O 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
I/O (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
I/O (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
I/O (PM4). Each pin has an independent interrupt capability in input mode.
And build-in schmitt trigger.
I/O
Input/Output port. Input/output mode specified by port mode 5 register
(PM5).
Special input/output port.
I/O
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.
O
Output pin only. This pin can output modulating or nonmodulating
frequency, or Timer 1 clock output specified by mode register 1 (MR1).
INT
RES
V_DD
V_SS
I External interrupt pin with pull-high resistor.
I System reset pin with pull-high resistor.
I Positive power supply (+).
I Negative power supply (-).
Publication Release Date: November 06, 2009
-5-
Revision A6