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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
SW2101
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
GPIO9
GPIO10
GPIO11
GPIO12
GPIO13
GPIO14
GPIO15
Table 3-8 Pin Mux for HDMI and Ethernet MII/RMII Interface
[P6]
GPIO130
[P6]
GPIO131
[P6]
GPIO132
[P26]
DPI_LAN_SEL
MediaTek Proprietary and
Confidential
Ethernet MII/RMII
Off
EXT_TXD0
EXT_TXD1
EXT_TXD2
EXT_TXD3
EXT_TXC
EXT_RXER
EXT_RXC
EXT_RXVD
EXT_RXD0
EXT_RXD1
EXT_RXD2
EXT_RXD3
EXT_TXEN
EXT_COL
EXT_MDIO
EXT_MDC
VIBR_PMU
VIO18_PMU
R7156
100K_1%
R0402
GPIO130
GPIO131
GPIO132
DPI_LAN_SEL
Figure 3-3 SW2102 Circuit
© 2022 MediaTek Inc. All rights reserved.
Unauthorized reproduction or disclosure of this document, in whole or in
part, is strictly prohibited.
Genio 350 Evaluation Kit Hardware User Guide
HDMI
DPI_D0
DPI_D12
DPI_D2
DPI_D3
DPI_D4
DPI_D5
DPI_D6
DPI_D7
DPI_D8
DPI_D9
DPI_D10
DPI_D11
DPI_DE
DPI_VSYNC
DPI_CK
DPI_HSYNC
R7003
R7002
R7001
4.7K_1%
4.7K_1%
4.7K_1%
R0402
R0402
R0402
5
6
7
8
Genio 350 EVK
Unclassified
ON
SW2101
HPS804
4
3
2
1
D_GND
Page 16 of 24
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