I really like the DigiView from http://www.tech-tools.com/dv_main.htm . I use it to analyze SPI, I2C, async (UART), and parallel buses. It's really nice to just read out the hex or ascii data instead of trying to decode scope traces. Bit rates on the async display are fully programmable to whatever you may need. Harold -- FCC Rules Updated Daily at http://www.hallikainen.com - Advertising opportunities available! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist