PCB of the Day! ESP32-S3 RGB TTL Experimentation board...take 2! ๐ง๐ก๐#adafruit
66Well, this is a first for us...our initial prototype design for an ESP32-S3 "RGB TTL" display driver board didn't work perfectly the first time!!@!?? j/k that's like Tuesday for us...so back to the drawing board. We won't try driving the TFT from the octal PSRAM dedicated pins (35, 36, & 37 natch), which means our pin usage got squeezed out since we needed them for all the hardware and button interfacing. So we slapped on an xCA9554 https://www.digikey.com/short/qpmrj929 - picked because it's the same i2c expander used on the official EV kit https://www.digikey.com/short/nbbjr3nh and its pretty cheap. Now, the expander handles the three TFT SPI initialization pins, TFT and touch reset, a basic backlight on-off, and the two side buttons. That leaves us 6 GPIO free: a full SPI set and two analog pins. We will share the neopixel with the UF2 bootloader double-tap detect. Will it work? We'll find out!
@EspressifSystems
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#espressif #esp32 #esp32s3 #espfriends #adafruit #electronics #pcb #opensource #opensourcehardware #pcboftheday #prototype #redesign #ttldisplay #tftdriver #i2cexpander #gpiopins #experimentation #pcbdesign #neopixel #bootloader