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2.5
Clocks
V2M-Juno r2 motherboard clocks drive the board, the Juno r2 SoC, and the LogicTile, if fitted in the
daughterboard site.
This section contains the following subsections:
•
•
2.5.2 Juno r2 SoC and V2M-Juno r2 motherboard clocks
•
2.5.1
Overview of clocks
Clock generators on the V2M-Juno r2 motherboard generate clocks for the internal blocks in the Juno r2
SoC, the internal blocks in the IOFPGA, and the peripherals on the board.
During powerup or reset, internal EEPROMs in the clock generators configure the generators to the
correct operational clock frequencies. The
board.txt
file also defines these default clock frequencies.
You can change the operational clock frequencies by modifying the configuration
board.txt
file.
Note
ARM recommends that you operate the V2M-Juno r2 motherboard at the default clock frequencies.
Related concepts
2.5.2
Juno r2 SoC and V2M-Juno r2 motherboard clocks
The following figure shows the Juno r2 SoC clocks and clock domains. The figure includes the clocks
that connect to the LogicTile Express daughterboard, to some of the peripherals on the V2M-Juno r2
motherboard, and to the IOFPGA.
2 Hardware Description
2.5 Clocks
ARM 100114_0200_03_en
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2-28
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