Nintendo GAME BOY Programming Manual page 30
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Also See for GAME BOY:
- User manual (28 pages) ,
- Instruction booklet (8 pages) ,
- Manual (139 pages)
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Game Boy Programming Manual
SIO Block Diagram
SIN
SOUT
SCK
VDD
Resistance
3-State Buffer
CTRL
IN1
Switch
IN2
CTRL
External/Internal Clock Selection
Internal Shift Clock (8 KHz/256 KHz)
7
6
5
4
3
2
8-bit Shift Register
OUT
OR
Gate
IN1
IN2
Serial Control (SC)
OUT
1
2
3
SC0
30
1
0
3-Bit Counter
Inverter
4
5
6
SC7
Transfer Start
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