PCM-2074 EVB User Manual
Revision 1.0 (03-31-06)
USER MANUAL
SMSC PCM-2074
14
10 Transceiver Implementation
The use of a non-isolated RS485 transceiver (the method used by the PCM-2074) is shown in the
figure below.:
For other transceiver implementations, refer to the CircLink Application Notes on the SMSC website.
11 Using the PCM-2074 with a Desktop PC
To use the PCM-2074 evaluation board in the PCI slot of a desktop PC, please use a general-purpose
conversion adaptor between the PCI slot and the PCM-2074 PCMCIA connector, such as the P111
from Elan Digital Systems (website: www.elandigitalsystems.com). Note that there is no guarantee of
operation or technical support provided by SMSC for this application.
Figure 10.1 Non-Isolated RS485 Transceiver
DI
DE
RE
A
B
RS-485 Transcei ve r
LTC1485
TXEN
TXD
RXIN
L+
GND
1K
1K
Vcc (+5V)
Drv
Rcv
GND
R
L-
