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52	52	* **D7 **is LOW**: **to disconnect 2MC USB-to-Serial IC Tx from ATMega328P Rx (pin D0) allowing the ATMega328P to receive data from the UART controller device as 2MC USB-to-Serial IC Tx is HIGH when 2MC is powered.
53	53	* **D14** is HIGH**:** when the 2MC Board is sending data on the LSS Tx line to an external UART device Rx pin. LSS Tx line is asserted to the 2MC Tx pin :
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55		-{{lightbox image="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-electronics/ses-modules/lss-2io-board/WebHome/LSS-2IO-Schematic-2RC-D14HIGH.png" width="900"/}}
	55	+{{lightbox image="LSS-2MC-Schematic-2RC-D14HIGH.png" width="900"/}}
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57	57	* **D14 **is LOW**:** when the 2IO Board is not sending data on the LSS Tx line. The 2IO frees up the LSS Tx line to avoid bus congestion (when 2 devices sends data at the same time) :
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59		-{{lightbox image="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-electronics/ses-modules/lss-2io-board/WebHome/LSS-2IO-Schematic-2RC-D14LOW.png" width="900"/}}
	59	+{{lightbox image="LSS-2MC-Schematic-2RC-D14LOW.png" width="900"/}}
60	60
61	61	{{warningBox warningText="**NOTE:** Double check that the Lss2MC Arduino program is loaded in the 2MCs ATMega328P to be able to use this mode"/}}
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64	64	= Pinout =
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66	66	|(% colspan="3" %)**Top External Pins**