TLC5940 SPI Slave Select

Hi!

I'd like to use a hardware SPI bus with a TLC5940 and a 25LC1024 eeprom. The 5940 has no SS line, so could I just disconnect the SIN line, if I dont want to select the 5940? Would a bilateral switch like this work? http://fi.farnell.com/nxp/74hc1g66gw/ic-74hc-single-gate-smd-74hc1g66/dp/1085257

SIN isn't the signal you'd want to disconnect, you'd want to disconnect SCLK.

However, I don't see a need to do that. Data isn't latched in until XLAT goes high. So just don't take XLAT high until after a serial message has been clocked in for the TLC.

Thanks, I'll try that! :slight_smile: