FunKey S Hardware

This repository contains all the hardware design and production files required to build the FunKey-S retro-gaming console electronic PCBA using the KiCAD ECAD tools.

If you don't want to install these tools but still want to get an idea of what it looks like, you can check the schematics and the layout in PDF format, the interactive BOM is directly in HTML format, you can download it and display it in a browser.

The FunKey S is a small foldable retro-gaming console.

Its electronic parts consist in:

• 1x main PCB (0.8 mm thickness) with components on both sides, the maximum component height above PCB on both sides is 1.5 mm. Current revision for this board is Revision E
• 1x 1.54” IPS LCD TFT screen with SPI interface and using a custom flex cable
• 1x 420 mAh 402540 LiPo battery

The FunKey S PCBA Rev. E contains the following main components:

• 1x Allwinner V3s SoC with integrated 64MB DDR2 DRAM (LQFP128 package)
• 1x X-Powers AXP209 companion PMIC chip to provide almost all required power supply rails (QFN48 package)
• 1x Sylergy SY8088 Buck DC/DC SMPS chip to provide the DRAM power supply rail (SOT23-5 package)
• 1x NXP PCAL6416 I2C GPIO expander to control all buttons and keypads (except Power Key) (QFN24 package)
• 1x Diodes Inc. PAM8301 mono audio amplifier (TSOT26 package)
• 1x 24 MHz main crystal
• 1x 32.768 kHz RTC crystal
• 1x Standex-Meder MK24 Reed switch for magnet proximity detection
• 1x LED for charge indication
• 1x 8 Ω 0.3 W built-in speaker
• 1x Micro USB edge-mounted connector
• 1x Micro SD (TF Card) Push/Push low-profile connector
• 1x Hirose DF37 0.4 mm pitch miniature LCD connector
• 1x JST 1 mm pitch battery connector
• 1x 1.27 mm pitch debug UART header (not mounted)