EVK-NORA-B1 - User guide
UBX-20030319 - R05
Hardware description
Page 10 of 32
C1-Public
2.5
Serial communication
The evaluation board allows for easy serial communication with the NORA-B1 module and a connected
computer. The J-Link debug interface IC provides three virtual COM port (VCP) devices:
•
The first (VCOM0) is used to obtain debug output and communicate with the network core.
•
The second (VCOM1) is not normally used, although it is available through test points on the EVK.
•
The third (VCOM2) is used to obtain debug output information and communicate with the
application core.
VCOM Port functions connected to the NORA-B1 module can be disabled through SW2 to allow use
of the GPIO pin for an application function.
Table 5 describes the function and test points for each module pin.
NORA-B1 pin name
NORA-B1 function
Test point / SW2 enable
Interface IC function
P1.01
Network core TXD
SW2 Position 2
RXD VCOM0
P1.00
Network core RXD
SW2 Position 2
TXD VCOM0
P0.11
Network core RTS
SW2 Position 1
CTS VCOM0
P0.10
Network core CTS
SW2 Position 1
RTS VCOM0
N/A
N/A
J6 Pin 22
RXD VCOM1
N/A
N/A
J6 Pin 20
TXD VCOM1
N/A
N/A
J6 Pin 19
CTS VCOM1
N/A
N/A
J6 Pin 21
RTS VCOM1
P0.20
Application core TXD
SW2 Position 3
RXD VCOM2
P0.22
Application core RXD
SW2 Position 3
TXD VCOM2
P0.19
Application core RTS
SW2 Position 4
CTS VCOM2
P0.21
Application core CTS
SW2 Position 4
RTS VCOM2
Table 5: Virtual COM port connections
