Table 23. J17-Rt_1; Table 24. J18-Rt_2 - ZiLOG eZ80F91 User Manual

eZ80F91 Development Kit
User Manual
40
Shunt
Status Function
IN The Termination Resistor for RS485_1 is IN.
OUT The Termination Resistor for RS485_1 is OUT.
Note: *Before enabling the termination resistor, ensure that the device is located at the end of the
interface line.
Shunt
Status Function
IN The Termination Resistor for RS485_2 is IN.
OUT The Termination Resistor for RS485_2 is OUT.
Note: *Before enabling the termination resistor, ensure that the device is located at the end of the
interface line.
Operational Description
Jumper J17
The J17 jumper connection controls the selection of the RS485 termina-
tion resistor circuit. When the shunt is placed, the RS485 termination
resistor circuit is enabled. See Table 23.
Table 23. J17—RT_1*
Jumper J18
The J18 jumper connection controls the selection of the RS485 termina-
tion resistor circuit. When the shunt is placed, the RS485 termination
resistor circuit is enabled. See Table 24.
Table 24. J18—RT_2*
PRELIMINARY
Affected Device
RS485 interface.
RS485 interface.
Affected Device
RS485 interface.
RS485 interface.
UM014210-1003