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Sony CDP-101 Service Manual page 81

Compact disc player
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Mode Switching
Pin Name
Word Code
When MDn is at level "1", data code 2° becomes
data "1".
This model's word code is 10001.
3-6.
Key
Matrix
Output
Pins Output
Waveforms
1) Initial State and Input Waiting State
"1"
is output
constantly.
In other words, no
matter which switch is turned on, the information
is transmitted directly to the key input pin.
2) Key Read-in State
From
the end of input waiting state, 200 usec
wide pulses are output with 600 usec time dif-
ference to KO1 — KO8, in that order.
The input frame is 4.8 msec (0.6 sec x 8 Pins) and
with 1 frame as the unit, is output continuously
until an abnormality is detected in key read-in.
Ims — 96 ms
input waiting
state
200 us
input 1 frame 4.8 ms
KO1
KOZ
400 us
KO3
KO4
3-5.
Transmission Codes
(27 _
231)
@
Word Code:
10001
@
Data code
(LSB — MSB)
30
_
46
Command
0000000
1
1000000
2
0100000
3
1100000
4
0010000
5
1010000
6
0110000
7
1110000
8
0001000
9
1001000
0
1101100
CLEAR
0011100
START
0001010
>>
1001010
<<
1101010
REPEAT CLEAR
0011010
REPEAT ALL
he
1011010
REPEAT 1
0000110
K<
1000110
aa|
0100110
>
1100110
<<
0010110
>>>
0001110
RESET
1001110
II
|
200 jus

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