Digi Connect Wi ME 9210 Hardware Reference Manual page 18

Primary Serial Port Pin Orientation
Pin 1 Pin 2
DCD RXD
Data Carrier Receive
Detect Data
Secondary Serial Port, P2
The Secondary Serial Port is a DB-9 male connector that is labeled as P2 on the development board.
The port is used only with the Digi Connect ME 9210 modules with JTAG interfaces for debugging
purposes. See the following figure for pin orientation; see the following table for pin assignments.
Secondary Serial Port Pin Orientation
Primary Serial Port Pin Assignments
Pin 3 Pin 4
TXD DTR
Data
Transmit
Terminal
Data
Ready
Pin 1 Pin 5
Pin 6 Pin 9
Pin 5 Pin 6 Pin 7
GND DSR RTS
Signal/
Data Set Request To
Chassis
Ready Send
Ground
Pin 1 Pin 5
Pin 6 Pin 9
Pin 8 Pin 9
CTS —
Clear To
—
Send
1 8
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