W741L250 Datasheet, PDF (3/86 Pages) Winbond – 4-BIT MICROCONTROLLER

W741L250
• MFP output pin
− Output is software selectable as modulating or nonmodulating frequency
− Works as frequency output specified by Timer 1
• Built-in 14-bit clock frequency divider circuit
• Two built-in 8-bit programmable countdown timers
− Timer 0: One of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected
− Timer 1: Offers auto-reload function and one of two internal clock frequencies (FOSC or
FOSC/64) can be selected or falling edge of pin RC.0 can be selected (output through MFP pin)
• Built-in 18/14-bit watchdog timer selectable for system reset
• Powerful instruction set: 116 instructions
• 8-level subroutine (include interrupt) nesting
• Up to 4 µS instruction cycle (with 1 MHz operating frequency)
• Packaged in 64-pin QFP
PIN CONFIGURATION
SSSSS
X
VVVEEEEE
R M/ / X OV
D D D D D GGGGG
A
F
I
N
R
E
I
UDNNHHDDD2 2 2 2 1
0 PTS NTDCC1 2 1 2 3 3 2 1 0 9
RA
1RA2
RA3
RB0
RB1
RB2
RB3
RC0
RC1
RC2
RC3
RD0
RD1
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
52
32
53
31
54
30
55
29
56
28
57
27
58
26
59
25
60
24
61
23
62
22
63
21
64
20
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
RRRRRRV NNCCCCS S S S S S
DDE E E E S CCOOOOE E E E E E
230123S
MMMMG G G G G G
3210012345
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
Publication Release Date: March 1998
-3-
Revision A2