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Added note about possible shift-register improvement.

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Matthew Nielsen 2017-01-24 16:56:31 -07:00
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@ -89,6 +89,8 @@ IIe Connector Col/Row Shift Register Input Notes
#### Shift register to Teensy 2.0
Follows DIP-8 package: http://www.ti.com/lit/ds/symlink/sn74ls165a.pdf
```
Teensy 2.0 Pin Shift Register Pin
@ -100,7 +102,12 @@ Teensy 2.0 Pin Shift Register Pin
GND 8: GND
```
Follows DIP-8 package: http://www.ti.com/lit/ds/symlink/sn74ls165a.pdf
##### Possible improvement
`SH/LD` is always pulled low at the same time as `CLK INH` is pulled high. That
means `CLK INH` could be driven from the same pin as `SH/LD` using a
single-transistor NOT gate. This would free another pin for an extra LED or
something.
#### Other Pins