CPU (LSI14: HD6433294A19F)
The
Pin No. | Terminal | In/Out | Function |
1 | P50/TXD | Out | MIDI signal output |
2 | P51/RXD | In | MIDI signal input |
3 | P52/SCK | Out | Reset signal output |
4 | In | Reset signal input | |
5 | In | Power ON trigger signal input | |
6 | VCC | In | +5 V source |
7 | In | Standby signal input. Connected to +5 V. | |
8 | VSS | In | Ground (0 V) source |
9, 10 | XTAL, EXTAL | In | 20 MHz clock input |
11, 12 | MD1, MD0 | In | Mode selection input |
13 | AVSS | In | Ground (0 V) source |
14 | P70 | In | Analog input terminal for the pitch bend wheel |
15 ~ 21 | P71 ~ P77 | Out | Input terminals from keys (KI1 ~ KI7) |
22 | AVCC | In | +5 V source |
23 ~ 30 | P60 ~ P67 | Out | LED drive signal output |
31 | VCC | In | +5 V source |
32 ~ 48 | A0 ~ A15 | Out | Address bus |
40 | VSS | In | Ground (0 V) source |
49 ~ 56 | D0 ~ D7 | In/Out | Data bus |
57 | P40 | Out | Clock for KO signal generator |
58 | P41 | Out | KO signal data |
59 | P42 | Out | APO signal output |
60 | P43 | Out | Read enable signal output |
61 | P44 | In | Write enable signal output |
62 | P45 | — | Not used |
63 | P46 | Out | 10 MHz clock output |
64 | P47 | — | Not used. Connected to +5 V source. |
DIGITAL SIGNAL PROCESSOR (LSI11: HG51B155FD-1)
Upon receipt of note numbers and their velocities, the DSP reads sound and velocity data from the sound source ROM in accordance with the selected tone; the DSP can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides
The following table shows the pin functions of LSI11.
— 7 —