ACTiSYS ACT-IR100SD - Manual (Page 8)

The Wireless Connectivity Expert
ACT-IR100SD OBEX Server
User’s Manual
 Copyright 2000-2006 ACTiSYS Corp. Page 8 of 17 Oct 30, 2006
4. HOST INTERFACE
The host interface of ACT-IR100SD is a full-duplex asynchronous RS232 DB9M connector. The following
table is the signals of DB9M connector. It can be treated as DTE. The data bytes are transmitted via TXD
pin and received via RXD. Each data byte consists of one start bit (0), 8 data bits (LSB first, MSB last), a
stop bit (1) and no parity bit.
Implementing H/W flow control signals in host end is recommended. Since ACT-IR100SD is a buffer
limited dongle. Without flow control will probably cause data loss sometimes. The H/W flow control
relative signals are: DTR, RTS, DSR and CTS, which are defined exactly as RS232 DTE interface.
1.1.1.1.2 ACT-I
R100
SD
Host
controlle r /RxD
/TXD /TXD
/RXD
/CTS
/RTS
/DTR
/DSR
/RTS
/CTS
/DSR
/DTR
Data Frame
D0 D1 D2 D3 D4 D5 D6 D7
STOP
BIT
START
BIT
MSB LSB
TxD / RxD Marking
Version 1.0