This issue was reported already. I have to look into this. Officially the timing is off, but usually it still works. If all fails you can reduce the speed of your i2c bus. Richard -----Original Message----- From: cores-bounces at opencores.org [mailto:cores-bounces at opencores.org] On Behalf Of omer_pessach at lucidlogix.com Sent: 15 September 2008 09:16 To: cores at opencores.org Subject: [oc] i2c setup time for start Hello Richard, I am running your i2c master in Highspeed configuration with prescale = 0004(~4MHZ) I am looking on set-up time for a repeated START condition in my simulation and it is 50ns but according to spec -> UM10204,I2C-bus specification and user manual Rev. 03 - 19 June 2007 the time should be minimum 160 ns. can you explain this? thank you. omer _______________________________________________ http://www.opencores.org/mailman/listinfo/cores