Table 21. J15-Rs485_1_En; Table 22. J16-Rs485_2_En - ZiLOG eZ80F91 User Manual

Jumper J15
The J15 jumper connection controls the selection RS485 circuit along
with UART0. When the shunt is placed, the RS485 circuit is enabled. See
Table 21. RS485 functionality will be available in future eZ80
Shunt
Status Function
IN The RS485 circuit is enabled on UART0.
The UART0 CONSOLE interface and IrDA are
disabled.
OUT The RS485 circuit is disabled on UART0.
Note: *To enable the RS485 circuit, the corresponding IrDA/RS232 circuit must be disabled.
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 22.
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.
UM014210-1003
Table 21. J15—RS485_1_EN*
Table 22. J16—RS485_2_EN
PRELIMINARY
eZ80F91 Development Kit
User Manual
Affected Device
IrDA, UART0 CONSOLE
interface, RS485 interface.
IrDA, UART0 CONSOLE
interface, RS485 interface.
Affected Device
UART1 MODEM interface,
Socket Modem Interface, and
RS485 interface.
UART1 MODEM interface,
Socket Modem Interface, and
RS485 interface.
®
eZ80 Development Platform
39
®
devices.