[RE Mote] uSD Power consumption

Micro SD power

Due a new implementation of driver for micro SD on RIOT We adapt the firmware to work on RE-Mote revision B for measure the current on diferents states of the uSD: init uSD, Read blocks, write, and disable over hardware.

Test setup

• RE-Mote Rev-B
• Micro SD Samsung 16gb
• Multimeter: Tektronix DMM 4020
• Power supply: TENMA 72.10480

Test methodology

Supplied by TENMA 72.10480 on VBAT at 4.0V, conected the multimeter on current position before RE-Mote pin. The firmware do the next steps:

• Reset RE-Mote and internal testing (LEDS, read MAC..), then init the micro SD, wait one second and read one block 100 times, wait less than 100ms and write the same block 100 times again, repeat read/write and disable the micro SD over PA6 and clear SPI1 lines .