TWR-SER2 User’s Manual
Page 6 of 17
3.1
Power Supply
It is intended that the TWR-SER2 be powered from a source in an assembled Tower System via the
5.0V and 3.3V supplies on the TWR-ELEV. This includes the functional Tower Elevator USB power
connector, a capable MCU/MPU controller module, or other Tower System module capable of
providing power to the entire Tower System. The TWR-SER2 is can also provide power to the Tower
System when configured and used as a USB device through the Hi-Speed USB connection (Jumper J24).
3.2
Dual Ethernet PHYs
The TWR-SER2 module utilizes an industrial applicable National Semiconductor Dual Ethernet PHY
Transceiver (DP83849I). The DP83849I features two fully independent 10/100 ports for multi-port
applications. The TWR-SER2 is capable of supporting a single MII interface, a single RMII interface, or
dual RMII interfaces.
The Ethernet PHY is configurable via two sets of micro dip switches (SW1 and SW2).
Refer to these settings for typical Ethernet setting. For specific setting details refer to the TWR-SER2
Jumper Options section.
10/100 Dual RMII
o
J8 and J9 should be un-shunted
o
Configure SW1 (1-8) as 11000000
o
Configure SW2 (1-8) as 10100000
10/100 Signal Port RMII
o
J9 should be un-shunted
o
Configure SW1 (1-8) as 11000000
o
Configure SW2 (1-8) as 10100000
10/100 Signal Port MII
o
J9 should be un-shunted
o
Configure SW1 (1-8) as 00110000
o
Configure SW2 (1-8) as 00010000
3.3
Hi-Speed Dual Role USB
The TWR-SER2 features Hi-Speed Dual Role USB. This feature is implemented using the SMSC
USB3300 USB Transceiver with ULPI interface. The ULPI interface is connected to the TWR-SER2 PCI
edge connector connect to a Tower MCU module.
Refer to these settings to configure the High Speed USB ULPI Transceiver.
Host Mode
– TWR-SER2 will be connected to a device, such as a USB Memory Stick using the
appropriate mini USB adaptor.
o
J24 should be un-shunted
