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Audio Spectrum Monitor using S1D15200 microcontroller




This is an evaluation use of a small graphics LCD module. Last summer, SG12232C graphic LCD module has been sold sold for 1500 Yens from Akizuki Denshi and I bought it. However I could not find good application for the LCD module and it was going to go to junk box 🙂 so that I tried to use the LCD module temporary.

Audio Spectrum Monitor

Only displaying any still image is not cool, first I tried to display an audio wave form in real-time like a digital oscilloscope, and then an FFT spectrum analysis too. The spectrum monitor seems to achived nice performance, in view of it is realized with a cheap microcontroller.

This can also be applied to radio frequency band.

Hardware

Audio Spectrum Monitor Hardware

SG12232C is a full graphics type LCD module in resolution of 122(H) x 32(V) dots. It has two Epson S1D15200 LCD controller on a board. The S1D15200 can display up to 61(H) x 32(V) dots and they drive half of the LCD panel each. SG12232C requires a 2 kHz square wave as LCD drive clock and it must be supplied during power is on or the LCD panel may be damaged due to static bias. The bus interface can select 8080 based or 6800 based. There is no 4-bit mode like HD447880, only 8-bit mode is available and it requires 14 I/O lines at least.

For more detail: Audio Spectrum Monitor using S1D15200 microcontroller

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