Hi, If a Master PIC wants to send multiple bytes of data to a Slave PIC (with SS enabled) using SPI, does it have to pull the SS line high at the end of every byte? The slave receives data perfectly with this: - SS low - Send data - Delay 10ms - SS high - SS low - Send data - Delay 10ms - SS high However, The slave doesn't receive data properly with this: - SS low - Send data - Delay 10ms - Send data - Delay 10ms - SS high Both the slave and the master are F877 @ 20Mhz. Did I do something wrong? Regards, Thomas -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu