Exar SP336E, Manual

Page: 3 / 7

3
Table 2
Resistor Header Device Mode Selected
R10 J7 U6-6&7 Mode 100
R11 J6 U6-3&4 Mode 010 & 100
R16 U6-15&16 Mode 101
R17 U6-17&18 Mode 011 & 101
Table 3
SW3-1 SW3-2 SW3-3 SW3-
4
MODE_0 MODE_1 MODE_3 SLEW
0 0 0 x
Loopback TXin to
RXout Txout & Rxin High
Impedance
0 0 1 x
RS-232 Mode 4T/4R RS232 Mode
0 1 0 x
Mixed Protocol, Half
Duplex 2T/2R RS232 Mode &
1T/1R RS-485
0 1 1 x
Mixed Protocol, Full
Duplex 2T/2R RS232 Mode &
1T/1R RS-485
1 0 0 x
RS-485/422 Half Duplex 2T/2R RS-485
1 0 1 x
RS-485/422 Full Duplex 2T/2R RS-485
1 1 0 x
Low Power, 4Rx Active Driver at High
Impedance
1 1 1 x
Low Power Shutdown All I/O at High
Impedance
x x x 0
RS-232 at 250kbps
RS-485 at 250Kbps
x x x 1
RS-232 at 1Mbps
RS-485 at 10Mbps
Note: Mode set for zero, SW3 to the Right
Mode set for one, SW3 to the Left