Twoglogdedicated
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Introduction
A TWOG board dedicated for LoggingYou can directly connect a micro SD card to a TWOG. Remember that micro SD cards do have a limited number of insertions and should not be plugged too often. The (micro) SD card is connected to the SPI1 of the TWOG following this scheme:
microSD TinyV2 SPI J3 8 nc 7 DO 5 MISO 6 GND 1 GND 5 CLK 7 SCK 4 Vcc 2 +3V3 3 DI 4 MOSI 2 CS 3 SSEL 1 nc
Looking onto the gold plated connector side of the microSD card:
###############
I 8
I 7
I 6
I 5
I 4
I 3
I 2
I 1
###### ##
\ I \
## ##
The start/stop button is connected to the BUTTON (P0.7) pin of the USB connector (J9). It is activated by pulling it low.