MACH 230 Symbol Creation

#1

Hi,

I am learning how to create schematic symbols using the Component Library Editor.

The proces for creation of schematic symbols is easy to use. But I need some advice on the format of the creation of a symbol for a Lattice MACH 230.

The MACH 230 is a 84 pin PLCC, which the pin connections are:

64 I/O pins
6 Vcc pins
8 GND
4 CLOCK / Input
2 Input

I started out creating the smybol as detailed in the Datasheet, but have read the KiCad Library Convention.

Section S4.2 indicates that pins should be grouped by function.

If I follow the convention, all 64 I/O pins will be grouped together.

Is this the correct way to create the symbol?

There are symbols availble on Github that do not follw this convention.

#2

It appears the chip has 8 I/O blocks, if you wanted to split the grouping, I would suggest breaking out 8 units, with 1 per I/O block, but in reality 64 pins is not that big, probably more to group to 8’s with a 1 pin gap between blocks.

#3

Hi,

Thanks for the advice, I will use your suggestion.

Derek