44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
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VideoCrypt controller 8052
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**************************
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Pin Funct Connections and Functionality
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******************************************************************************
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1-8 P1.0-P1.7 Internal Bus connected to other chips and
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pin 30-40 on MOTOROLA CPU
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9 RST Pin 29 on MOTO CPU
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10 RxD/P3.0 N.C. (No Connection)
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11 TxD/P3.1 N.C.
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12 !INT0/P3.2 Card presence switch
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13 !INT1/P3.3 Pin 30 on MOTO CPU
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14 T0/P3.4 Pin 32 on MOTO CPU
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15 T1/P3.5 Pin 18 on MOTO CPU
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16 !WR/P3.6 N.C.
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17 !RD/P3.7 N.C.
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18 XTAL2 7 MHz Clk
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19 XTAL1 GND
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20 Vss GND
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21 P2.0 Card Pad 2 : EEPROM Programming ????
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22 P2.1 N.C.
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23 P2.2 D input 74LS74, pin 12, Card Clk generator
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24 P2.3 D input 74LS74, pin 2, Card Clk generator
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25 P2.4 N.C.
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26 P2.5 N.C.
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27 P2.6 Pin 14 on MOTO CPU
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28 P2.7 N.C.
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29 !PSEN N.C.
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30 ALE/!PROG N.C.
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31 !EA/Vpp N.C.
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32 P0.7 3.5 MHz Card Clk signal
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33 P0.6 Card Pad 6 : RST
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34 P0.5 Select CMD 21.0V supply, Card programming
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35 P0.4 Select CMD 12.5V supply, Card programming
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36 P0.3 Select CMD 15.0V supply, Card programming
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37 P0.2 ON CMD Vpp, Card programming
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38 P0.1 ON CMD Vcc Card
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39 P0.0 Card Pad 3 : I/O
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40 Vcc +5V supply
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********************************************************************************
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