Cirrus Logic CDB61884 - Manual (Page 21)

CDB61884
DS485DB1 21
7. EVALUATION HINTS
– Pin #1 of the socket is indicated by an arrow with U1 below it.
– A short in the desired position must be placed on Jumper J13 to connect the CS61884 to one of the
power supply binding post. LED D3 will illuminate when jumper J13 is connected to a power supply.
– Before selecting any host mode place the CBLSEL, LOOP, ADDRESS, LEN and JASEL switches in
the open or none position.
– When using the CS61884 device in internal match impedance mode, be sure that the 1 K
Ω
resistors
are not in series with the receivers.