Differences

This shows you the differences between two versions of the page.

--- chips:74157 [2005/11/15 21:45] – nfg
+++ chips:74157 [2005/12/15 00:00] – nfg
@@ Line 1: / Line 1: @@
 ===== 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.
+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 each. 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.
+{{chips:74157.gif?nocache }}
-{{ chips:ic-74157.png}}
 ^ IC 1 ^^^^
 ^ Pin ^ Function ^ Function ^ Pin ^
-|   1 |  DB9-8  |  DB9-5  | 16  |
+|  1 | Select  |  Vcc | 16 |
-|   2 |  Right  |  GND  | 15  |
+|  2 | 1A  |  CE | 15 |
-|   3 |  Select  |  R Button  | 14  |
+|  3 | 1B  |  4A | 14 |
-|   4 |  DB9-4  |  Up  | 13  |
+|  4 | 1Y  |  4B | 13 |
-|   5 |  Left  |  DB9-1  | 12  |
+|  5 | 2A  |  4Y | 12 |
-|   6 |  X button  |  Down  | 11  |
+|  6 | 2B  |  3A | 11 |
-|   7 |  DB9-3  |  Y Button | 10  |
+|  7 | 2Y  |  3B | 10 |
-|   8 |  GND  |  DB9-2  | 9  |
+|  8 | Gnd  |  3Y | 9  |
 ** UNFINISHED! **