Table 20. J16-Rs485_2_En; Table 21. J17-Rt_1 - ZiLOG eZ80F92 User Manual

eZ80F92 Development Kit
User Manual
38
Shunt
Status Function
In The RS485 circuit is enabled on UART1.
The UART1 MODEM interface and the
Socket Modem interface are disabled.
Out The RS485 circuit is disabled on UART1.
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.
Operational Description
Jumper J16
The J16 jumper connection controls the selection of the RS485 circuit.
However, UART1 MODEM interface and the socket modem interface are
disabled if the RS485 circuit is enabled. When the shunt is placed, the
RS485 circuit is enabled. See Table 20.
Table 20. J16—RS485_2_EN
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 21.
Table 21. J17—RT_1*
Affected Device
UART1 MODEM interface,
Socket Modem Interface, and
RS485 interface.
UART1 MODEM interface,
Socket Modem Interface, and
RS485 interface.
PRELIMINARY
Affected Device
RS485 interface.
RS485 interface.
UM013904-0203