Huawei MediaPad 10 fhd Maintenance Manual page 43

MediaPad10 FHD Maintenance Manual
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microSD Card Interface
The Hi3620 provides a dedicated microSD card slot, which complies with the SD3.0
specification and supports at most the SDR50 or DDR50.
SDIO Interface
The Hi3620 provides two SDIO buses, which comply with the SD2.0 specification and
support at most the SDR25. The two buses are used to connect peripherals.
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UART Interface
The Hi3620 provides five UART interfaces, all of which support four-wire hardware flow
control and provide the maximum baud rate of 3.25 Mbit/s. These interfaces are used to
connect to peripherals.
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SPI Interface
The Hi3620 supports five groups of SPI bus interfaces, all of which work in master mode.
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2012-10-09
CSI1_DSI1: This interface can be statically multiplexed as an LCD display interface (in
the two-screen application scenario) or as an interface for camera image capturing (in 3D
image pickup and master/master camera application scenarios).
DVP: This interface is used to connect to a camera through a parallel bus. It is reserved
for the front camera.
The bus clock frequency of the SDR50 is 100 MHz, and that of the DDR50 is 50 MHz.
SDIO0: This interface is the data and control interface of the AP or modem. Its signal
level is 1.8 V or 2.5 V.
SDIO1: This interface is the data and control interface of Wi-Fi. Its signal level is 1.8 V.
The bus clock frequency of the SDR25 is 50 MHz.
UART0: This UART interface is specially used for system commissioning or loading. Its
signal level is 2.5 V.
UART1: unused.
UART2: This interface is statically multiplexed with USIM and onewire signals and
reserved for peripherals. Its signal level is 1.8 V.
UART3: This interface is multiplexed with the GPS baseband bus GPS_SPI that is
integrated in the Hi3620. It provides a data and control channel for external third-party
GPS devices. Its signal level is 1.8 V.
UART4: This interface is multiplexed with the Bluetooth baseband interface BT_IF that
is integrated in the Hi3620. It provides a data and control channel for external third-party
Bluetooth devices. Its signal level is 1.8 V.
SPI0: This SPI interface supports a maximum of four chip selection signals. It is
reserved for peripherals, such as the CMMB. Its signal level is 1.8 V.
SPI1: This interface is the communication and control interface of the modem. Its signal
level is 1.8 V or 2.5 V.
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