DAC (UPD6376CX)
UPD6376CX is a
Pin No. | Terminal | In/Out | Function |
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1 | SEL | In | Mode selection terminal. Connected to ground. |
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2 | D.GND | In | Ground (0V) source for internal digital circuit |
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3 | NC |
| Not used. |
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4 | DVDD | In | +5V source for internal digital circuit |
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5 | A.GND | In | Ground (0V) source for internal analog circuit |
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6 | R.OUT | Out | Sound waveform output |
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7 | A.VDD | In | +5V source for internal analog circuit |
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8 | A.VDD | In | +5V source for internal analog circuit |
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9 | R.REF | In | Reference voltage terminal. Connected to a capacitor. |
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10 | L.REF | In | Reference voltage terminal. Connected to a capacitor. |
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11 | L.OUT | Out | Left channel sound waveform output |
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12 | A.GND | In | Ground (0V) source for internal analog circuit |
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13 | LRCK | In | Word clock (L/R separation signal) input. |
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14 | LRSEL | In | Not used. Connected to ground. |
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15 | SI | In | Sound data input |
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16 | CLK | In | Bit clock input |
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Key Touch LSI (HG52E35P)
By counting the time between
Keyboard |
KC |
First contact |
Key scan signal
Key touch LSI
HG52E35P
KC0 RESB
CCSB
KC7 CWRB CRDB CKI
Reset signal from the CPU
Chip select signal from the gate array Read enable signal from the gate array Write enable signal from the gate array Clock from the gate array
FI |
SI |
Second contact |
Key input signal
FI0
SI0
FI7
CD0
CD7
Data bus
SI7 CA0 ~ CA2
Address bus
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