2023-07-19-KLST_PANDA-final-design-concept

one year later and the concept for the hardware design of the next board KLST_PANDA is finalized. it has evolved quite a bit from the considerations in KLST_PANDA_starting_design_phase and 2023-04-17-KLST_PANDA-Prototyping.

the general idea is now to build the final version of the board that will incorporate a lot of features that may ( or may not ) be used in future projects or implementations. this resonates with the idea that Klangstrom is on the one hand a development plattform for audio-based applications but also a modular blueprint for all sorts of hardware projects.

features

  • core or MCU
    • STM32H723ZGT
  • display
    • 4.3” 480×272px 24bit color ER-TFT043A2-3
    • capacitive touch panel FT5206
    • dimmable backlight ‌CAT4139‌
    • LTDC interface ( parallel )
  • rechargeable battery
    • type 18650 cells
    • on-off switch
  • USB-C
    • 2× connectors
    • USB Device + charging
    • USB Host
  • audio codec
    • WM8904
    • stereo in+output audio codec
    • headphone amplifier
  • external memory
    • S70KL1282
    • 16MB ( 128Mb )
    • Octo-SPI/HyperRAM™ interface
  • SDCard
    • 4-bit wide bus
    • with card detect
  • microphone
    • on-board MEMS microphone
    • via I2S
  • DAC+ADC
    • range 0.0–3.3V
    • DAC interfaced via 3.5mm mono audio connector
    • ADC interfaced via 3.5mm mono audio connector
  • MIDI ( analog )
    • interfaced via 3.5mm stereo audio connector ( TRS with Type A allocation )
  • GPIO
    • 4× programmable PWM pins
    • 1× I2C ( 2 pins )
    • 1× SPI ( 4 pins )
    • 1× USART ( 2 pins )
    • 3× ADC ( in addition to ADC via audio connector )
    • 10× standard digital in-/output pins
    • GND ( 3 pins )
    • 5.0V
    • 3.3V
  • LEDs
    • 2 dimmable LEDs
  • buttons
    • reset, boot, programmer
    • 2× mechanical keybord keys
  • programmer interface
    • STD14
    • Tag Connect TC2070 pogo pin connector ( without housing on front-side )
  • case+shape
    • black&white PCB