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siphaser: add support for 100mhz rtio

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mwojcik 2021-11-26 13:17:40 +08:00 committed by Sébastien Bourdeauducq
parent 163f5d9128
commit eec3ea6589
1 changed files with 4 additions and 4 deletions
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8
artiq/gateware/drtio/siphaser.py
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@ -4,7 +4,7 @@ from migen.genlib.cdc import MultiReg, PulseSynchronizer
from misoc.interconnect.csr import * from misoc.interconnect.csr import *
# This code assumes 125/62.5MHz reference clock and 125MHz or 150MHz RTIO # This code assumes 125/62.5MHz reference clock and 100MHz, 125MHz or 150MHz RTIO
# frequency. # frequency.
class SiPhaser7Series(Module, AutoCSR): class SiPhaser7Series(Module, AutoCSR):
@ -15,9 +15,9 @@ class SiPhaser7Series(Module, AutoCSR):
self.phase_shift_done = CSRStatus(reset=1) self.phase_shift_done = CSRStatus(reset=1)
self.error = CSR() self.error = CSR()
assert rtio_clk_freq in (125e6, 150e6) assert rtio_clk_freq in (100e6, 125e6, 150e6)
# 125MHz/62.5MHz reference clock to 125MHz/150MHz. VCO @ 750MHz. # 125MHz/62.5MHz reference clock to 100MHz/125MHz/150MHz. VCO @ 750MHz.
# Used to provide a startup clock to the transceiver through the Si, # Used to provide a startup clock to the transceiver through the Si,
# we do not use the crystal reference so that the PFD (f3) frequency # we do not use the crystal reference so that the PFD (f3) frequency
# can be high. # can be high.
@ -43,7 +43,7 @@ class SiPhaser7Series(Module, AutoCSR):
else: else:
mmcm_freerun_output = mmcm_freerun_output_raw mmcm_freerun_output = mmcm_freerun_output_raw
# 125MHz/150MHz to 125MHz/150MHz with controllable phase shift, # 100MHz/125MHz/150MHz to 100MHz/125MHz/150MHz with controllable phase shift,
# VCO @ 1000MHz/1200MHz. # VCO @ 1000MHz/1200MHz.
# Inserted between CDR and output to Si, used to correct # Inserted between CDR and output to Si, used to correct
# non-determinstic skew of Si5324. # non-determinstic skew of Si5324.