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W541C250 Schematic ( PDF Datasheet ) - Winbond

Teilenummer W541C250
Beschreibung 4-BIT MICROCONTROLLER
Hersteller Winbond
Logo Winbond Logo 




Gesamt 10 Seiten
W541C250 Datasheet, Funktion
W541C250 Data Sheet
www.DataSheet4U.com
4-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. BLOCK DIAGRAM ...................................................................................................................... 4
4. PIN CONFIGURATION ............................................................................................................... 5
5. PIN DESCRIPTION..................................................................................................................... 6
6. ELECTRICAL CHARACTERISTICS ........................................................................................... 7
6.1 Absolute Maximum Ratings........................................................................................... 7
6.2 DC Characteristics ........................................................................................................ 7
6.3 AC Characteristics......................................................................................................... 8
7. APPLICATION CIRCUIT............................................................................................................. 9
8. REVISION HISTORY ................................................................................................................ 10
Publication Release Date: April 14, 2005
- 1 - Revision A6






W541C250 Datasheet, Funktion
W541C250
5. PIN DESCRIPTION
SYMBOL
XIN
XOUT
RA0RA3
RB0RB3
RC0RC3
RD0RD3
RE0RE3
MFP
INT
RES
SEG0SEG23
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.
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).
4-bit port for input only.
I Each pin has an independent interrupt capability. And build-in schmitt
trigger
I 4-bit port for input only.
O
Output port only.
This port provides high sink current to drive LEDs.
Output pin only.
O
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
I External interrupt pin with pull-high resistor.
I System reset pin with pull-high resistor.
O
LCD segment output pins.
Can also be used as DC output ports specified by code option.
LCD common signal output pins.
COM0COM3 O
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
The LCD alternating frequency can be selected by code option.
DH1, DH2
VDD1, VDD2
VDD3
VDD
VSS
I Connection terminals for voltage doubler (halver) capacitor.
Positive (+) supply voltage terminal.
I Refer to Functional Description.
I Positive power supply (+).
I Negative power supply (-).
-6-

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