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Figure 1: TEBF0808-04 Block Diagram
Main Components
Figure 2: TEBF0808-04 Carrier Board
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The TEBF0808 carrier board provides with its Mini-ITX form factor the possibility to encase the board boa rd in a PC Enclosure. For this purpose, the board is equipped with several Intel-PC compatible headers to connect them to the PC Enclosure.
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Figure 10: TEBF0808 System Controller CPLDs
Programmable PLL Clock Generator
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The TEBF0808 Carrier Board is equipped with a Silicon Labs I2C programmable quad PLL clock generator Si5338A (U35). It's output frequencies can be programmed by using the I2C bus with address 0x70.
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Due to the different signaling voltage levels of the MicroSD and MMC Card interfaces (3.3V) and the PS MIO bank of the Zynq Ultrascale+ MPSoC (1.8V), there is voltage-translation necessary, which is fullfilled by the SDIO port expander Texas Instruments TXS02612, U15. This IC also muxes the MikroSD and the MMC Card sockets to the SDIO port of the MPSoC, which is controlled by the signal 'SEL_SD' of the System Controller CPLD U39. The SC CPLD U39 also controls the load switches to enable the card sockets J16 and J27 and to report the card detect signal both of the sockets to the MPSoC (see schematic).
DIP-
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Switches
There are two 4 bit DIP Switches on the TEBF0808 carrier board to configure options and set parameters. The table below describes the functionalities of the particular switches:
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Overview
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