As others have pointed out, it's really best to use an xcvr chip. The MAX232 clones from ST Micro are quite cheap. Do remember that versions that include internal capacitors are quite a bit more expensive than adding capacitors yourself. -marc On 14/4/03 05:27, "Werner Soekoe" wrote: > Quick Question: > > If I use the USART of the PIC16F627 (or any other PIC with an USART) in async > mode to communicate with a PC via a RS232 serial port, do I need to a > transceiver chip such as the MAX232, or will it work without the transceiver? > The datasheet I have on the PIC16F627 seems unclear about his, as do the > application notes on the Microchip website. > > Thanks > Werner > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > -------------------------------------------------- Marc Nicholas Geekythings Inc. C/416.543.4896 UNIX, Database, Security and Networking Consulting -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.