YosysHQ / nextpnr

nextpnr portable FPGA place and route tool
ISC License
1.24k stars 236 forks source link

Gowin. Add PLL pads. #1309

Closed yrabbit closed 2 months ago

yrabbit commented 2 months ago

If the CLKIN input of the PLL is connected to a special pin, then it makes sense to try to place the PLL so that it uses a direct implicit non-switched connection to this pin.

The transfer of information about pins for various purposes has been implemented (clock input signal, feedback, etc), but so far only CLKIN is used.