What are the features of freedom board FRDM-K20D50M?

The FRDM-K20D50M is Freescale’s freedom board with ARM Cortex-M4 core. It comes with the 4 dual-row headers, a temperature sensor and an ambient light sensor.

The following figure shows the FRDM-K20D50M board:

The following are the new features of the FRDM-K20D50M board compared to the previous FRDM-KL25Z board:

• There are two crystals: one 32 kHz and one 8 MHz one
• New analog Ambient Light Sensor with J12 jumper to isolate it
• New Temperature Sensor (U11) with jumper J13 to isolate it
• Two jumpers (J16 and J17) to disconnect the I2C lines to the accelerometer
• Jumper J14 to cut the reset line between OpenSDA and the target CPU
• Jumper J13 to isolate the BD1020HFV-TR temperature sensor
• Jumper J21 to enable USB Host support (unprotected)