Casio CTK-811EX Spécifications télécharger pdf (Page 20)

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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 In/Out Function

1 WRB In Write signal from CPU.

2 ~ 11, 13,

D0 ~ D15 In/Out Data bus.

14, 16 ~ 19

12 VSS In Ground terminal (0 V).

15 VDD In VDD (5 V) source.

20 ~ 23 CA0 ~ CA3 In Address bus.

24 VSS In Ground terminal (0 V).

25 ~ 32, FI0 ~ FI4,

In Key input signal.

34, 35 SI0 ~ SI4

33 VDD In VDD (5 V) source.

36 ~ 38,

KC0 ~ KC7 Out Key scan signal.

40 ~ 44

39 VSS In Ground terminal (0 V).

45 VDD In VDD (5 V) source.

46 ~ 51

FI5 ~ FI7

In Key input signal.

SI5 ~ SI7

52 VSS In Ground terminal (0 V).

53 ~ 58,

FI8 ~ FI10

60 ~ 62

SI8 ~ SI10 In Key input signal (Not used).

KI0 ~ KI2

59 VDD In VDD (5 V) source.

63, 64

MODE0, MODE1

— Not used.

65 VSS In Ground terminal (0 V).

66 KCKI In Clock signal for key common/input.

67 ~ 72,

— Not used.

74 ~ 77

73 VDD In VDD (5 V) source.

78 RESB In Reset signal from CPU.

79 CSB In Chip selection signal.

80 RDB In Read signal from CPU.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 40 41

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Casio CTK-811EX Spécifications Page 20

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