W741E20X Datasheet, PDF (5/84 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

BLOCK DIAGRAM
Preliminary W741E20X
VPP (RES)
DATA (RA3)
MODE (INT)
RAM
(128*4)
Flash
EEPROM
(2048*16)
(look_up table
2K*4)
+1(+2)
PC
STACK
(8 Levels)
ACC
ALU
Central Control
Unit
IEF HEF PEF
HCF EVF SEF
PSR0 PSR1 PSR2
. . . ^{PR MR0 PM0}
PORT RA
PORT RB
PORT RC
PORT RD
PORT RT
Serial I/O
SEL
MUX
RA0 to 3
RB0 to 3
RC0 to 3
RD0 to 3
RE0 to 3
(RE0/DOUT,
RE1/CLKO,
RE2/DIN,
RE3/CLKI)
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
RES
INT
Publication Release Date: March 1998
-5-
Revision A1