Pin No. | Terminal | In/Out |
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| Function | ||||||
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106 | EOEB |
| Out |
| Read enable signal output for the effect RAM | ||||||
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108 | VCC7 |
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| In |
| +5V source | |||||
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111 | ECEB |
| Out |
| Chip select signal output for the effect RAM | ||||||
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113 ~ 117 | ED11 ~ ED15 |
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| Not used | |||
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118 | VCC4 |
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| In |
| +5V source | |||||
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119 | GND4 |
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| In |
| Ground (0V) source | |||||
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120 ~ 122 | ED8 ~ ED10 |
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| Not used |
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123 ~ 130 | ED0 ~ ED7 | In/Out |
| Data bus for the effect RAM | |||||||
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131 | GND5 |
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| 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
D0 ~ D7
A0 ~ A3
A12
A14
RD
APO
WR
RESET
Sound Source ROM
LSI101
| CE A0 ~ A19 | D0 ~ D15 | ||
RA22 | RA0 ~ | RD0 ~ | ||
RA19 | RD15 | |||
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| DSP |
| |
CCSB | LSI102 |
| |||
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CRDB | HG51B155FD |
| |||
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CWRB |
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RESB |
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ECEB EOEB EWEB |
| ||||
CS OE WE | ED0 ~ | EA0 ~ | |||
ED15 | EA14 | ||||
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| D0 ~ D15 | A0 ~ A14 | |
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| Effect RAM | |||
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| LSI103 |
| |
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SOLP: Sound data
BOK: Bit clock
WOK1: Word clock
| DAC |
|
SOLP | SI LSI104 | ROUT |
BOK | CLK |
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WOK1 | LRCK | LOUT |
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| |
| UPD6376GS |
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PG
X101
24.576 MHz
— 13 —
