Electric imp IMP001

Overview
The labels "EEL_BCM43362_A" and "323C1627834D" are
 * silkscreened on the bottom side of the board.


 * MCU: STMicroelectronics STM32F205RG
 * SoC: ARM Cortex-M3 MCU (120MHz max, 32-bit Core)
 * with Adaptive real-time accelerator (ART. Accelerator)
 * 1MB Flash memory, MPU, UART, I²C, CAN, SDIO, USB OTG

Links of Interest

 * Devices •  Datasheet
 * Current imp Hardware Options

Serial Pinouts
There are a number of test pads available on the bottom of
 * the board which can be used to access the bootloader.

You can interface with it using any 3.3V TTL RS-232 interface
 * and stm32loader code. The wiring required:

sudo ./stm32loader.py -p /dev/ttyUSB0 -V Open port /dev/ttyUSB0, baud 115200 *** Get command Bootloader version: 0x30 Available commands: 0x63, 0x73, 0x82, 0x92 Bootloader version 30 *** GetID command Chip id: 0x0411 (STM32F2xx) *** Do NOT send the Readout Unprotect command (0x92) to the chip,
 * it will erase the entire flash bricking the device!

Refer to AN1355 for details about the bootloader protocol'''.