mangOH Green DV4, Developer'S Manual, Page: 27 / 34

Hardware
Rev 2 Jun.16 27 4118903
Figure 2-14: UART1 Configuration
UART2
The primary CF3 module’s UART2 signal connects via a MUX to one of the following sources, as
shown in
Figure 2-15 :
• RS-232 DB9 serial connector (CN700)—Default configuration
• IoT Connector 2 (CN1002)
The UART2 interface configuration can be modified as detailed in Table 2-10 .
Figure 2-15: UART2 Configuration
Main CF3 UART1
IoT Connector #0
(CN1000, slot IOT0)
UART
IoT Connector #1
(CN1001, slot IOT1)
UART
ATMega32U4
(U1500)
UART
Note: Green arrows show default
hardware configuration
Mux1
Mux2
Table 2-10: UART2 Interface Configuration Changes
Change type Change effect Method Change duration
Software Mux1—Use default or
alternate configuration. API command Modifies running
configuration until device
reboots or another change is
made.
Hardware Mux1—Use default or
alternate configuration Set resistor on Mux1:
•
Low—Default
•
High—Alternate
Selected configuration used
every time device boots up.
Mux1
RS-232 DB9
(CN700)
Transceiver
Main CF3 UART2
IoT Connector #2
(CN1002, slot IOT2)
UART
Note: Green arrows show default
hardware configuration