COMHP 101
CyberResearch
®
Serial Communication
6
©Copyright 2003
CyberResearch, Inc.
I/O Signal Derivation
The
COMHP 101
input/output signals are directly generated via the Zilog 16C32 IUSC. The following table defines
these signals, their origin pin and signal name following the conventions set by the 16C32 user’s manual. If using a
supplied driver, this is for informational use only.
Signal Source
Transmit Data
16C32 TXD Pin
Request To Send
16C32 Port7 Pin
Data Terminal Ready
16C32 Port6 Pin
Transmit Signal Element Timing
16C32 TXC Pin
Receive Data
16C32 RXC Pin
Clear To Send
16C32 CTS Pin
Data Set Ready
16C32 RXREQ Pin
Data Carrier Detect
16C32 DCD Pin
Transmit Clock
16C32 TXCO Pin
Receive Clock
16C32 RXCO Pin
Ring Indicator
16C32 TXREQ Pin
