303 Simple NCO

303 : Simple NCO

Design render
  • Author: s1Pu11i
  • Description: Simple NCO which can also output sine, square or sawtooth.
  • GitHub repository
  • Clock: 0 Hz

How it works

Simple NCO to generate a sine, square or sawtooth output. Sine wave is generated from a table and square and sawtooth from the phase accumulator. Note: Output is unsigned 8bit.

How to test

Modeselection is done with the uio[1:0]: 0: NONE, output is 0 1: SINE 2: SQUARE 3: SAWTOOTH Frequency word is 16bit and is given as split into upper and lower part. Lower part is given with by uio[2]='1' and ui[7:0]=word and the upper part by uio[3]='1' and ui[7:0]=word.

External hardware

None.

IO

#InputOutputBidirectional
0ModeSelectionBit0
1ModeSelectionBit1
2FrequencyWordLower8BitUpdateEnable
3FrequencyWordUpper8BitUpdateEnable
4
5
6
7

Chip location

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