AN2125 View Datasheet(PDF) - STMicroelectronics
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MFG CO.
'AN2125' PDF : 68 Pages View PDF
uPSD3300 Series Design Guide for DK3300-ELCD Using KEIL
Figure 35. Design Assistant Chip select equations (LCD_E2)
Click on the remaining chip-selects for main flash
10. Click "Next" to move on to I/OLogic Definitions.
7.4 I/O Logic Equations
Defined here are equations for PLD outputs for the LCD interface signals. The Design Assis-
tant (DA) will create HDL logic statements using the ABEL language in the background after
you enter logic in this point-and-click design entry environment. The DA will also create all the
declaration statements in ABEL. This saves much typing and reduces the chance of error. For
more complicated logic PSDsoft allows you to edit the ABEL statements directly.
1. Click on "LCD_rw" as shown in Figure 36
Note: The internal signal a0 is assigned to drive the output signal "LCD_rw". Although this
was a very simple logic equation, AND, OR, XOR, NOT, and other logic operators are also
available for general purpose logic.
2. Click through the remaining signal names and observe the logic assigned.
Note: There is no logic equation assigned to term_count because that assignment will be
made by editing the ABEL file directly.
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