Switches, Buttons and Misc. Headers 7
miriac SBC-LX2160A User Manual
V 1.6
57/71
© MicroSys Electronics GmbH 2021
7.1.6 SW6 (Board Configuration)
SW6 configures some functionallity on the carrier.
SW-pin
Description Function
1
closed
RGMII_2 is used for IEEE 1588
1
open
RMII_2 is connected to J19, Phy 88E1512P
2
closed
EP_SELECT = EP = endpoint
2
open
EP_SELECT = RC = root complex
3
closed
Not used
3
open
Not used
4
closed
USB Host mode
4
open
USB OTG mode
Table 7-3 SW6 function
7.2
Expansion / Development Headers
7.2.1 ST49 (ATX Power On Jumper)
ST49 has to be closed by a jumper to enable power to the carrier. The module
power is independent from this jumper.
7.2.2 ST4 (Regulator Enable)
If the included jumper on ST4 is inserted, all carrier board supplies are enabled.
Otherwise, all regulators on the carrier board are disabled. The MPX-LX2160A
SoM will also loose power if ST4 is removed.
For evaluation purpose, a switch (permanent, not momentary) can also be
connected, to enable / disable the carrier power supply.
7.2.3 ST32 (Module CPLD JTAG)
This connector is for MicroSys internal use only. Please contact MicroSys for
further information on custom CPLD implementations on the SoM.
Interface is used for CPLD programming and debugging. Signal level is 3,3V.
ST32
ST2 (Module connector)
CPLD
Pin
Signal
Pin
Signal
Pin
Signal
1
JTAG_CPLD.ENB
E12
JTAG_CPLD_ENB
C10
JTAG_CPLD_ENB
2
3V3
3
JTAG_CPLD.TDO
E16
JTAG_CPLD_TDO
C6
JTAG_CPLD_TDO
4
3V3
5
JTAG_CPLD.TDI
E15
JTAG_CPLD_TDI
A6
JTAG_CPLD_TDI
6
CPLD_USART.RX
B22
CPLD-USART-RX
E9
CPLD-USART-RX
7
JTAG_CPLD.TCK
E14
JTAG_CPLD_TCK
A7
JTAG_CPLD_TCK
8
CPLD_USART.TX
B23
CPLD-USART-TX
D8
CPLD-USART-TX
9
JTAG_CPLD.TMS
E13
JTAG_CPLD_TMS
B8
JTAG_CPLD_TMS
