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KEY TOUCH LSI (LSI10: TC190C020AF-001)
By counting the time between first-key input signal FI and second-key SI from the keyboard unit, the key
touch LSI detects key velocity of 256-step. Then the LSI sends the CPU the note number and its velocity
data.
Pin No.
Terminal
1
WRB
2 ~ 11, 13,
D0 ~ D15
14, 16 ~ 19
12
VSS
15
VDD
20 ~ 23
CA0 ~ CA3
24
VSS
25 ~ 32,
FI0 ~ FI4,
34, 35
SI0 ~ SI4
33
VDD
36 ~ 38,
KC0 ~ KC7
40 ~ 44
39
VSS
45
VDD
FI5 ~ FI7
46 ~ 51
SI5 ~ SI7
52
VSS
FI8 ~ FI10
53 ~ 58,
SI8 ~ SI10
60 ~ 62
KI0 ~ KI2
59
VDD
63, 64
MODE0, MODE1
65
VSS
66
KCKI
67 ~ 72,
74 ~ 77
73
VDD
78
RESB
79
CSB
80
RDB
In/Out
In
Write signal from CPU.
In/Out
Data bus.
In
Ground terminal (0 V).
In
VDD (5 V) source.
In
Address bus.
In
Ground terminal (0 V).
In
Key input signal.
In
VDD (5 V) source.
Out
Key scan signal.
In
Ground terminal (0 V).
In
VDD (5 V) source.
In
Key input signal.
In
Ground terminal (0 V).
In
Key input signal (Not used).
In
VDD (5 V) source.
—
Not used.
In
Ground terminal (0 V).
In
Clock signal for key common/input.
—
Not used.
In
VDD (5 V) source.
In
Reset signal from CPU.
In
Chip selection signal.
In
Read signal from CPU.
— 17 —
Function
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