At 01:10 PM 3/26/97 CST, you wrote: >Hello, >I am currently using a 73A in a project and need to have more than 8 -bit >A/D for one input line. >I have been looking at an A/D that is made to interface to the SSP module >in the SPI mode, the problem is >I dont understand how to simultaneously send and receive data. Can >anyone give a hint? Read Maxim's MAX147 data sheet. It has it explained VERY well. Unless you need to know what's happening inside your PIC. Microchip did that pretty well too, I thought. Look at the app notes. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================