MEDIATEK Genio 350 - How to Switch between HDMI and Ethernet Interfaces

Genio 350 EVK
Genio 350 Evaluation Kit Hardware User Guide
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3.13 How to Switch between HDMI and Ethernet Interfaces
DPI and Ethernet MII/RMII Interfaces share some GPIO pins. These two functions can not exist simultaneously.
Reflash code and reboot system might be necessary when you switch between the interfaces. A mount of
analog switch ICs (74LVC2G53) are used to switch these two interfaces. The work could be done via a DIP
switch easily. The DPI interface will be converted to an HDMI output port through a bridge IC (ITE IT66121FN).
GPIO Ethernet MII/RMII HDMI
SW2101 Off ON
GPIO0 EXT_TXD0 DPI_D0
GPIO1 EXT_TXD1 DPI_D12
GPIO2 EXT_TXD2 DPI_D2
GPIO3 EXT_TXD3 DPI_D3
GPIO4 EXT_TXC DPI_D4
GPIO5 EXT_RXER DPI_D5
GPIO6 EXT_RXC DPI_D6
GPIO7 EXT_RXVD DPI_D7
GPIO8 EXT_RXD0 DPI_D8
GPIO9 EXT_RXD1 DPI_D9
GPIO10 EXT_RXD2 DPI_D10
GPIO11 EXT_RXD3 DPI_D11
GPIO12 EXT_TXEN DPI_DE
GPIO13 EXT_COL DPI_VSYNC
GPIO14 EXT_MDIO DPI_CK
GPIO15 EXT_MDC DPI_HSYNC
Table 3-8 Pin Mux for HDMI and Ethernet MII/RMII Interface
Figure 3-3 SW2102 Circuit
VIBR_PMU
R7003
4.7K_1%
R0402
12
DPI_LAN_SEL[P26]
R7156
100K_1%
R0402
12
R7001
4.7K_1%
R0402
12
GPIO131[P6]
GPIO132
D_GND
R7002
4.7K_1%
R0402
12
GPIO131
DPI_LAN_SEL
GPIO130[P6]
VIO18_PMU
SW2101
HPS804
1
2
3
4
8
7
6
5
GPIO132[P6]
GPIO130