Pin No. | Terminal | In/Out | Function | |
93 | VCC5 | In | +5V source | |
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94, 95 |
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97 ~ 105 | EA0 ~ EA14 | Out | Address bus for the effect RAM | |
107,109 | ||||
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110, 112 |
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96 | EWEB | Out | Write enable signal output for the effect RAM | |
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106 | EOEB | Out | Read enable signal output for the effect RAM | |
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108 | VCC7 | In | +5V source | |
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111 | ECEB | Out | Chip select signal output for the effect RAM | |
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113 ~ 117 |
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| Not used. | |
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118 | VCC4 | In | +5V source | |
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119 | GND4 | In | Ground (0V) source | |
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120 ~ 122 |
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| Not sued. | |
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123 ~ 130 | ED0 ~ ED7 | In/Out | Data bus for the effect RAM | |
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131 | GND5 | In | Ground (0V) source | |
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132 ~ 134 |
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| Not used. Connected to ground. | |
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135, 136 |
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| Not used. | |
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Block diagram of DSP and DAC circuit
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| Sound Source ROM | ||
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| CE A0 ~ A19 | D0 ~ D15 | ||
RA22 | RA0 ~ | RD0 ~ | ||
RA19 | RD15 | |||
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SOLP: Sound data
BOK: Bit clock
WOK1: Word clock
D0 ~ D7 |
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A0 ~ A3 |
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| DSP |
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| HG51A115A01FD |
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LSIS |
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RDAPO |
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WRAPO |
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| ECEB EOEB EWEB |
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RESET |
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| CS | OE WE | ED0 ~ | EA0 ~ |
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| PG |
| ED15 | EA14 |
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16.384MHz |
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| D0 ~ D15 | A0 ~ A14 |
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| Effect RAM |
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| HM65256BLP |
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SOLP
BOK
WOK1
DAC
SI
CLK
LRCK
UPD6376CX
ROUT
LOUT
— 9 —
