Table of Contents
Advertisement
8-2. Voice Input/Output Circuit
/"I '1)8253
/<PI)8255
O
O
C R c rn
0
n
o
C H C H r r r
- D
H
~
-i
~
PS X
?S
0
-• *-~
rvj
ro
Q
, — •
t^
ir
^
1 5 1 4 1 2 2 4 9 1 5 1 8
1 3
'cc
1
v
cc
_
l 1
^
777
A
C458
+T
S
JT-
>
r
5
i
T
CLOCK
GENERATER
2.45076 M Hz
<ni
Vj
*
T A 711 9
^Sr
,
X^T
.Xj
4*
r
.Jl
ii
>
n
ii
~
7
il
Vc
T
V O I C E
SPKR
Music Output waveform
Tonal Signal
OUT1
Sustain
PC4
2SC458
emitter
2SC458
collector
Speaker
Output
• GETE1
\
l
- 83 -
Advertisement
Table of Contents
