initial board info

Board-Olimex-STM32-405STK.md

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+Cortex M4
+* Olimex STM32-405STK https://www.olimex.com/Products/ARM/ST/STM32-405STK/
+
+###Features###
+* STM32F405RGT6 ARM 32 bit CORTEX M4™ 168MHz
+* 1024KB FLASH, 192kB SRAM
+* 2x ADC 12 bit
+* 3 TIMERS - up to 72Mhz
+* USB, CAN, 2 I2C, 3 UART, 2 SPI
+* LCD NOKIA 3310 BW 84x48 pixels
+* 1.5V battery connector with step-up converter
+* 3-axis accelerometer
+* SD-MMC card
+* 2.4 Ghz transciever with Nordic nRF23L01
+* 2 user buttons, Joystick with 4 directions and push action
+
+###Status###
+No work has yet been done on porting to this chip