2

1 2 3 4

3.2.1 1

CPUCPUACC2

TTL 7.2510 ms

3

R-S()7.3R-S

10 ms 4. I/O

5. (1) (2) (3)

3.2.2 1. I/OI/OI/O I/OI/O

2. I/OI/OI/OI/OP1

3.2.3 1. 4416I/O

5V

2. 7.58 CPU8228

9101128021232208

3. 447.582020H7.54401H02H03H0EH0FH10H16

4. CPUCPUCPU 1) CPUCPUCPU

(1) (2) (3) (4) (5)

P1 4 X 4SO-S90-9S10-S15A-F1P14P14

1KEYMOVA#0F0H MOVP1A XRLAP1JZKEYR ACALL DELAYMOV30HP1MOVP1#0FHMOVAP1ORL30HALOOPMOVAP1XRLA#0FHJNZLOOPACALLDELAYKEYRRET

201S711010111B = 0D7HS1201111110B = 7EHTRAN MOV DPTR#KEYTABDPTR MOV R2#0R2 MOV R3#10HR3LOOPT MOV AR2 MOVC A@A+DPTR XRL A30H JZ KTRR2 INC R2+1 DJNZ R3LOOPTKTR RETR2=10HKEYTABDB0EEH0EDH0EBH0E7H DB0DEH0DDH0DBH0D7H DB0BEH0BDH0BBH0B7H DB7EH7DH7BH77H