W742C814 查看數據表（PDF） - Winbond
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W742C814 Datasheet PDF : 46 Pages
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W742C814
− Output is one channel Dual Tone Multi-Frequency signal for dialing
• Two built-in 14-bit frequency dividers
− Divider0: the clock source is the output of the Fosc-oscillator
− Divider1: the clock source is the output of the Fslow-oscillator
• 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: with auto-reload function and one of three internal clock frequencies (FOSC, FOSC/64 or
Fs) can be selected by MR1 register; and the specified frequency can be delivered to MFP pin
• Built-in 18/15-bit watchdog timer selectable for system reset; enable the watch dog timer or not is
determined by code option
• Build-in Power-on reset detested circuit
• Powerful instruction set: 1XX instructions
• 8-levels subroutine (include interrupt) nesting
3. PIN CONFIGURATION
For W742C814 QFP 80-pin
TT
S
/ DEE
V
X
VVC CC C E
R R MR T S S V N X V X O N D D D D O O O O N G
A A F E M T T D C X F I U C H H D D M MM M C 3
1 0 P S F 2 1 D F NT 1 2 1 2 0 1 2 3 1
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
RA2
65
RA3
66
RB0
67
RB1
68
RB2
69
RB3
70
RC0
71
RC1
72
RC2
73
RC3
74
RD0
75
RD1
76
RD2
77
RD3
78
RE0
79
RE1
80
40
SEG30
39
SEG29
38
SEG28
37
SEG27
36
SEG26
35
SEG25
34
SEG24
33
SEG23
32
SEG22
31
SEG21
30
SEG20
29
SEG19
28
SEG18
27
SEG17
26
SEG16
25
SEG15
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
N N RR V NN S S S S S S S S S S S S S S S NN
C C EE S CC E EEE E E E EEE E E E E ECC
23 S
G GGG G G G GGG G G G G G
0 123 4 5 6 789 1 1 1 1 1
01234
-4-
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