— 11 —
Pin No.
Terminal
I n / O u t
Function
1
REQB
Out
Not used.
FI8 ~ FI10,
SI8 ~ SI10
4
VCC
In
+5 V source
5
CRDB
In
Read enable signal input
6
CWRB
In
Write enable signal input
7
CCSB
In
Chip select signal input
8, 9, 11
T, STBY, W
In
Not used. Connected to +5 V.
10
RESB
In
Reset signal input
12
CKI
In
10 MHz clock input
13, 14
TMD, TST
In
Not used. Connected to ground.
15
CKO
Out
Not used.
16
GND
In
Ground (0 V) source
17
XIN
In
Not used. Connected to ground.
18
XOUT
Out
Not used.
19
TRES
In
Not used. Connected to ground.
20 ~ 23, 25 ~ 28
CD0 ~ CD7
In/Out
Data bus
24
GND
In
Ground (0 V) source
29 ~ 31
CA0 ~ CA2
In
Address bus
32
VCC
In
+5 V source
33 ~ 39, 41 ~ 43,
FI0 ~ FI9,
53 ~ 55, 57 ~ 63
SI0 ~ SI9
40
VCC
In
+5 V source
44 ~ 47, 49 ~ 52
KC0 ~ KC7
Out
Key scan signal
48, 56
GND
In
Ground (0 V) source
64
VCC
In
+5 V source
2, 3, 60 ~ 63
In
In
Not used. Connected to +5 V.
Key input signal input
The following table shows the pin functions of LSI16.
AVDD
1 K
1 K
1 K
C471B
C103(H)
AG
AG
1 K
AG
To main volume
-
+
IC203
M5218APR
16 V 10 µ
C333(H)
Q210/211
2SC1740
10 K
50 V 0.47 µ
From the DAC
AVDD
FILTER BLOCK
Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the
waveforms.
Содержание WK-1500
Страница 1: ...GM SOUND KEYBOARD WK 1500 WK 1500 PITCH BEND ...
Страница 15: ... 15 SCHEMATIC DIAGRAMS MAIN PCB JCM717 MA1M 4 6 7 8 9 10 11 13 14 12 1 2 5 3 ...
Страница 16: ... 16 SUB PCB KDM717 MA2M 16 15 ...
Страница 17: ... 17 CONSOLE PCBs KDM717 CN1M CN2 CN3 CN4 ...
Страница 18: ... 18 KEYBOARD PCBs JCM762T KY1M KY2M KY3 ...
Страница 23: ...MA0900761A Sep 1996 ...
