Datasheet

RS-232/RS-485/RS-422 Protocol Selection
EV kit jumper JU3 sets the communication protocol to
either RS-232 or RS-485/RS-422. See Table 3 for
configuring jumper JU3. For additional protocol-config-
uration information, refer to the
Functional Diagrams
section of the MAX3160E IC data sheet.
RS-485/RS-422 Communication Mode
EV kit jumper JU4 configures the MAX3160E IC’s RS-485/
RS-422 communication mode to full duplex or half
duplex. To receive RS-485 data, disable the RS-485
outputs by driving the DE485/T2IN PCB pad low. See
Table 4 to configure jumper JU4 for the desired mode
of communication.
DTE/DCE Connections
The EV kit features jumpers JU5, JU6, JU7, and JU8 to
configure the RS-232 connector J1 as a data terminal
equipment (DTE) or as a data communications equip-
ment (DCE) connector. See Table 5 for configuring the
respective jumpers for DTE or DCE connection mode.
RS-485/RS-422 Termination
EV kit jumpers JU9 and JU10 configure the RS-485/RS-
422 termination. JU9 sets the input termination with
resistor R6. JU10 sets the output termination with resistor
R5. See Table 6 for the RS-485/RS-422 termination
options.
EV Kit I/O Connections
The MAX3160E EV kit features PCB pads for interfacing
with logic signals. PCB pads and a DB9 connector (J1)
are available to interface with an RS-232/RS-485/RS-422
serial line. See Figures 1 or 2 for RS-232 or RS-485/
RS-422 transceiver functional modes.
The RS-232/RS-485/RS-422 input range is ±25V and
the output range is ±5V.
Evaluates: MAX3160E
MAX3160E Evaluation Kit
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Table 3. RS-232/RS-485/RS-422 Protocol
(Jumper JU3)
SHUNT POSITION
RS-485/RS-232
PIN
EV KIT FUNCTION
Installed Connected to GND RS-232 mode
Not installed
Connected to VCC
through resistor R3
RS-485/RS-422
mode
Table 4. Communication Mode
(Jumper JU4)
SHUNT POSITION HDPLX PIN
RS-485/RS-422
MODE
Installed Connected to GND Full-duplex mode
Not installed
Connected to VCC
through resistor R4
Half-duplex mode
Table 5. DTE/DCE Modes (Jumpers JU5, JU6, JU7, and JU8)
JU5 JU6 JU7 JU8
SHUNT POSITION
J1 PIN 2
CONNECTED TO
J1 PIN 3
CONNECTED TO
J1 PIN 7
CONNECTED TO
J1 PIN 8
CONNECTED TO
J1 CONNECTION
MODE
1-2 B/R1IN Z(B)/T1OUT Y(A)/T2OUT A/R2IN DCE
2-3 Z(B)/T1OUT B/R1IN A/R2IN Y(A)/T2OUT DTE
Table 6. RS-485/RS-422 Termination (Jumpers JU9 and JU10)
JU9 JU10
SHUNT POSITION
RS-485 INPUT RS-485 OUTPUT
TERMINATION VALUE
Installed
A/R2IN connected to B/R1IN
through resistor R6
Y(A)/T2OUT connected to
Z(B)/T1OUT through resistor R5
120Ω termination
Not installed Not connected Not connected —