SolidRun Ltd MX6 User Manual
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SR-uSOM-MX6 Debugging Capability
The SR-uSOM-MX6 exposes two main debugging interfaces:
1. UART RS-232 interface
2. JTAG interface
2. JTAG interface
The UART RS-232 interface is a null modem interface that is internally pulled up to two
different voltage levels:
different voltage levels:
1. NVCC_EIM0 voltage in case AzureWave SiP is not used (typically 3.3V)
2. 2.8v when the AzureWave SiP is used (signals are shared with SDIO interface that is
2. 2.8v when the AzureWave SiP is used (signals are shared with SDIO interface that is
limited to 2.8V)
The UART interface is optional to use and mentioned here since most of the software
infrastructure used in CuBox-i and HummingBoard uses those two signals for debugging.
infrastructure used in CuBox-i and HummingBoard uses those two signals for debugging.
JTAG interface is on the SR-uSOM-mx6 and is exposed as test pins. Following is a snapshot of
the test points and its connectivity traces:
the test points and its connectivity traces:
Differences between SR-uSOM-MX6 Versions
Changes between SR-uSOM-MX6 rev 1.1 to rev 1.2:
Moved VDD_HIGH_IN power rail from NVCC_EIM0 power pin to SNVS_3V0 power pin.
Changes between SR-uSOM-MX6 rev 1.2 to rev 1.3:
Added three mechanical holes for RF cage to cover BRCM4330 based WiFi/BT SiP.