chips:74157
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74157 IC
The 74157 is a quad 2-line to 1-line multiplexer. Basically how this works is there are two inputs ( A and B ) for every output ( Y ). There are four groups like this, with two inputs and one output. There is one select signal for the whole chip. When the select signal is low, the output ( Y ) is the same as input A. When the select signal is high, the output Y is the same as input B.
Note: The buttons below correspond to SNES buttons. They should be replaced with weak/med/hard Punch + Kick references.
IC 1 | |||
---|---|---|---|
Pin | Function | Function | Pin |
1 | DB9-8 | DB9-5 | 16 |
2 | Right | GND | 15 |
3 | Select | R Button | 14 |
4 | DB9-4 | Up | 13 |
5 | Left | DB9-1 | 12 |
6 | X button | Down | 11 |
7 | DB9-3 | Y Button | 10 |
8 | GND | DB9-2 | 9 |
UNFINISHED!
chips/74157.1132055122.txt.gz · Last modified: 2019/08/27 20:44 (external edit)