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| author | David Shah <dave@ds0.me> | 2020-10-01 09:02:29 +0100 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-10-01 09:02:29 +0100 |
| commit | c4244d967d5698ea5932ee7249d8de86eeb3260d (patch) | |
| tree | 35efc1066ea17131b8336e00b59401f5ba7a85cd /docs | |
| parent | 3c7c95ecce7bd8c2d6226f5c64eab8fe52ab51e1 (diff) | |
| download | nextpnr-c4244d967d5698ea5932ee7249d8de86eeb3260d.tar.gz nextpnr-c4244d967d5698ea5932ee7249d8de86eeb3260d.tar.bz2 nextpnr-c4244d967d5698ea5932ee7249d8de86eeb3260d.zip | |
docs: Tidy up
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/constraints.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/constraints.md b/docs/constraints.md index 4917b33f..dead8780 100644 --- a/docs/constraints.md +++ b/docs/constraints.md @@ -13,9 +13,9 @@ and the ECP5 architecture supports a subset of LPF constraints (for details see LOCATE COMP "led[0]" SITE "E16"; IOBUF PORT "led[0]" IO_TYPE=LVCMOS25; - IOBUF ... DRIVE=8; + IOBUF ... DRIVE=4|8|12|16; // currently LVCMOS33 and LVCMOS33D only IOBUF ... OPENDRAIN=ON|OFF; - IOBUF ... TERMINATION=50; + IOBUF ... TERMINATION=50|75|150; IOBUF ... DIFFRESISTOR=100; //for differential IO only IOBUF ... CLAMP=ON|OFF; IOBUF ... PULLMODE=UP|DOWN|NONE; |