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README.md

Pmod KYPD

Contents of Readme

  1. About
  2. Brief information about Pmod KYPD
  3. Interface Description
  4. Test
  5. Status
  6. Licence

About

Decoder for the Digilent Pmod KYPD.

Brief information about Pmod KYPD

The Digilent Pmod KYPD is a 4x4 keypad with pull-up resistors in row nets.

Interface Description

Port discriptions of the interface module can be found below.

Port Type Width Description
clk I 1 System Clock (100 MHz)
rst I 1 System Reset
row I 4 Row pins
col O 4 Column pins
buttons O 16 Decoded buttons
num_val O 4 Numaric key number

I: Input O: Output

NOTE:

  • Multiple presses on same column is detected however not on same row.

  • num_val shows higher key when multiple keys are pressed.

Mapping for buttons

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
F E D C B A 9 8 7 6 5 4 3 2 1 0

Test

Module kypd tested with kypdTest.v and Basys3.xdc. Pmod KYPD connected to JC header and num_val connected to upper JB header. Post buttons is connected to LEDs.

Status Information

Last test: 3 Fabruary 2021, on Digilent Basys 3.

License

CERN Open Hardware Licence Version 2 - Weakly Reciprocal