W741L250 Datasheet, PDF (5/86 Pages) Winbond – 4-BIT MICROCONTROLLER

BLOCK DIAGRAM
W741L250
SEG0 to SEG23 COM0 to COM3 VDD1 to 3 DH1 to 2
RAM
(128*4)
ROM
(2048*16)
(look_up table
2K*4)
+1(+2)
PC
STACK
(8 Levels)
LCD DRIVER
ACC
ALU
Central Control
Unit
IEF HEF PEF
HCF EVF SEF
PSR0 PR MR1
. ..
PORT RA
PORT RB
PORT RD
PORT RC
PORT RE
RA0 to 3
RB0 to 3
RD0 to 3
RC0 to 3
RE0 to 3
Timer 0
(8 Bit)
Timer 1
(8 Bit)
Modulation
Frequency
Pulse
SEL
MUX
Watchdog Timer
(4 Bit)
Divider 0
(14 Bit)
Timing Generator
XIN XOUT
MFP
VDD
VSS
INT
RES
Publication Release Date: March 1998
-5-
Revision A2