User`s manual

Am186™CC Microcontroller Router Reference Design User’s Manual
2-22
Serial PC Interface
NOTE: See sheet 12 in the schematics for the serial PC interface circuitry.
The high-speed serial port may be used for communication with a PC. The Sipex
high-speed RS-232 transceiver (at location J-9) is used to provide serial data rates
up to 460 Kbaud. The DCE serial connection is made through a standard female
DB-9 connector (at location H-9), which uses a straight-through serial cable (no
null-modem). PIO0, PIO1, PIO27, and PIO28 can be used to provide extra flow
control signaling to support Plug and Play (PnP) operation. LED CR9 (at location
J-9) indicates transmit and receive activity (green is transmit, red is receive).
about.book Page 22 Wednesday, July 21, 1999 11:10 AM