Casio CTK-520L Manual de usuario descargar pdf (Pagina 7)

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Pin No. Terminal In/Out Function

1 MA14 Out Address bus

2 MWEB Out Clock for LED latches

3 NCO — Not used.

4 ~ 19 MA0 ~ MA13 Out Address bus

13 MRDB Out Read enable signal

17 MCSB — Not used.

20 ~ 27 MD0 ~ MD7 In/Out Data bus

28, 29 NC1, NC2 — Not used.

30 DGND In Ground (0 V) source

31 DVCC In +5 V source

32, 33 XTLO, XTLI In/Out 20 MHz clock input/output

34 NC3 — Not used. Connected to ground.

35 RSTB In Reset signal input

36 P24/RXD — Not used. Connected to +5 V.

37 P25/TXD — Not used.

38 NMI In

Power ON signal input

39 APO Out APO (Auto Power Off) signal output

40 NC4 — Not used.

41 REFH Out Terminal for the internal DAC

42, 43 NC5, NC6 — Not used.

44 DAOR Out Right channel sound waveform output

45 NC7 — Not used.

46 AVdac In +5 V source for the internal DAC and ADC

47 DAOL Out Left channel sound waveform output

48 REFL Out Terminal for the internal DAC and ADC

49 AGdac In Ground source for the internal DAC

50 AGadc In Ground source for the internal ADC

51 ANI — Not used. Connected to ground.

52 AVadc In +5 V source for the internal ADC

53 NC8 — Not used.

54 MOD0 In Mode selection terminal. Connected to +5 V.

55, 56 MOD1, MOD2 In Mode selection terminal. Connected to ground.

57 P40 In APO cancellation signal

58 ~ 65 KI0/P30 ~ KI7/P37 In Terminals for key/button input signal

66 ~ 73 KO0/P50 ~ KO7/P57 Out Terminals for key scan signal

74 ~ 77 KO8/P20 ~ KO11/P23 Out Terminals for button input signal

78 NC9 — Not used.

79 LVCC In +5 V source

80 ~ 95 LX0 ~ LX7, LY0 ~ LY7 Out LED drive signal

96 LGND In Ground source

97, 98 MA18, MA17 — Not used.

99, 100 MA16, MA15 Out Address bus

CPU (LSI1: MSM6755B-07)

The CPU reads sound data from the ROM in accordance with the pressed key and the selected tone; the CPU

can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides the left and the right

channels' waveforms separately, by converting the data into the waveforms with two built-in DACs. The CPU

also controls key input, button input and LED driving. The following table shows the pin functions of LSI1.

1 2 3 4 5 6 7 8 9 10 11 12 ... 20 21

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Casio CTK-520L Manual de usuario Pagina 7

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