Hardware

Hardware

The bitbox console is a low-power retro-modern open-hardware gaming platform, based on a Cortex M4 chip. You can get the schematics directly here:
https://github.com/makapuf/bitbox/tree/master/hardware

MCU

• Cortex M4 STM32F405: clockrate 168MHz, 192KB RAM.

Storage

• microSD card port, FAT file format
• 1 MB internal flash storage

Inputs

• 2 USB ports
• UEXT

Outputs

• VGA
• audio jack

Deep details

from http://bitboxconsole.blogspot.nl/p/rev2.html

Specifications

• 15 bit color
• 1 user button
• stereo 12bit DAC
• microSD driven by 4wire SDIO
• 2 USB 2.0 host
• 1 microUSB for power
• UEXT extension port

Hardware Reference (for kernel coding)

• User Button : PE15
  • use pullUP, set to GND when pressed
• User LED : PA2
• VGA :
  • H Sync : PA1
  • V Sync : PA0
  • R : PE14-10
  • G : PE 9-5
  • B : PE 4-0
  • Main CPU frequency is 192MHz now. This means that a full screen range can be 700x480 (generated as 640x480, sync taken care by screens)
• Audio :
  • L : PA4, R : PA5
  • lowpass filter
• Boot :
  • Boot1 : pulled down,
  • Boot0 : pulled down, jumper up
• SDIO
  • SDIO 4pins used.
  • std SDIO pins, no pullup (use internal pullups)
  • Card sense on PC7 (no ext pullup, setup internal) ; set to GND if card present (see errata)
• Dual USB host
  • std pins
• Micro USB : used for power.
  • 500mA power polyfuse
  • Can be used for full USB (even usb device w/ DFU) in place of USB HOST x using solder jumpers
• Pullups (47k) on :
  • PC11, PA10,PB5, PB11 (boot1)
• UEXT 10-pins connector using
  • USART3 (TX/RX, no DFU), or PD8&9
  • I2C1 (PB6/7)
  • SPI (PB9,10 / PC2,3)
• Swd 4 pins, requires power