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3. System Block Diagram
12V
Power Supply
Outputs
Enable
(+5V, +3.3V, +2.5V,
+1.8V, +1.1V)
Level
Shifter
GS12241
J1
Figure 3-1: System Block Diagram
RDK-12GCONV
Reference Design Kit User Guide
PDS-061593
Button/
Display
Microcontroller
GSPI Interface
STM32F205VB
RX0
RX1
RX2
GS12070
RX3
GS12090
GS12090
J2
www.semtech.com
Rev.0
August 2017
USB Interface
90Ω Differential
Impedance Uncontrolled
50Ω Single-ended
75Ω Single-ended
100Ω Differential
TX0
TX1
TX2
TX3
GS12090
J3
J4
GS12281/
GS12182
J5
11 of 44
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