T W R - S 0 8 L L / L H U S E R G U I D E
A P R I L 2 7 , 2 0 1 0
U S E R G U I D E
11
COM Connector
A 2x5, 0
.1”, pin-header provides external connections for the SCI port. Figure 5 below shows
the COM_PORT pin-out.
Figure 5: COM_PORT Connector, J3
2, 7
1
2
1, 7
TXD
3
4
CTS
RXD
5
6
RTS
1, 2
7
8
NC
GND
9
10 VDD_MCU
COM_SEL
The COM_SEL option header connects the MCU SCI port to either the SCI PHY or the USB-
BDM connection. Figure 6below shows the settings for COM_SEL option header
Figure 6: COM_SEL Option Header, JP5
● ● ●
Select USB serial communications. NOTE: USB serial
COM is not supported at this time
● ● ●
● ● ●
Select serial RS-232 communications (default)
● ● ●
LCD
The TWR-S08 applies a GD-5306P, 2x28 chip-on-glass, LCD connected directly to the target
MCU. The target MCU provides the internal charge-pump and regulated LCD reference
voltage required by the LCD. LCD contrast is trimmable under MCU control. Refer to the
target device RM for further details on configuring using the LCD interface. The GD-5306P
datasheet may be found on the Support CD included with the board. The LCD datasheet may
also be found at
www.axman.com/support
.
COM USB
COM USB