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ttl_serdes_7series: use simpler I/O buffers 

In theory equivalent with these parameters.
This commit is contained in:
Sebastien Bourdeauducq 2021-02-07 20:10:37 +08:00
parent 6bd9691ba8
commit db25f4e8f7
1 changed files with 2 additions and 12 deletions
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14
artiq/gateware/rtio/phy/ttl_serdes_7series.py
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@ -28,12 +28,7 @@ class _OSERDESE2_8X(Module):
if pad_n is None: if pad_n is None:
self.comb += pad.eq(pad_o) self.comb += pad.eq(pad_o)
else: else:
self.specials += Instance("IOBUFDS_INTERMDISABLE", self.specials += Instance("IOBUFDS",
p_DIFF_TERM="FALSE",
p_IBUF_LOW_PWR="TRUE",
p_USE_IBUFDISABLE="TRUE",
i_IBUFDISABLE=1,
i_INTERMDISABLE=1,
i_I=pad_o, i_I=pad_o,
i_T=self.t_out, i_T=self.t_out,
io_IO=pad, io_IOB=pad_n) io_IO=pad, io_IOB=pad_n)
@ -63,12 +58,7 @@ class _ISERDESE2_8X(Module):
if pad_n is None: if pad_n is None:
self.comb += pad_i.eq(pad) self.comb += pad_i.eq(pad)
else: else:
self.specials += Instance("IBUFDS_INTERMDISABLE", self.specials += Instance("IBUFDS",
p_DIFF_TERM="TRUE",
p_IBUF_LOW_PWR="TRUE",
p_USE_IBUFDISABLE="TRUE",
i_IBUFDISABLE=0,
i_INTERMDISABLE=0,
o_O=pad_i, o_O=pad_i,
io_I=pad, io_IB=pad_n) io_I=pad, io_IB=pad_n)