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Update PicoRV32 clock frequency to 24 MHz

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Include a seed value for nextpnr to get a layout that
reaches 24 MHz.
This commit is contained in:
Jonas Thörnblad 2024-10-22 15:27:53 +02:00
parent c6e8b6930c
commit 1651a1a666
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5 changed files with 13 additions and 12 deletions
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6
hw/application_fpga/core/trng/README.md
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@ -81,9 +81,9 @@ the implementation:
- 16 oscillators in each group
- 64 bits collected before setting the ready flag
With the TKey device running at 18 MHz this means that we sample bits
at 4.3 kbps. Since we sample twice to produce a single bit, the
effective raw bitrate is 2.1 kbps.
With the TKey device running at 24 MHz this means that we sample bits
at 5.8 kbps. Since we sample twice to produce a single bit, the
effective raw bitrate is 2.9 kbps.
The 64 bits collected means that there is a separation of at least 32
collected entropy bits between bits in the words read out.