Zilog EZ80L92 - Manual (Page 41)

eZ80L92 Development Kit
User Manual
UM012913-0407 Operational Description
37
Jumper J14
The J14 jumper connection controls the polarity of the Ring Indicator. See
Table 18 .
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 19 . RS485 functionality will be available for the future eZ80
®
devices.
Table 18. J14—RI
Shunt
Status
Function Affected Device
1–2 The Ring Indicator for UART1 is inverted. UART1.
2–3 The Ring Indicator for UART1 is not inverted. UART1.
Table 19. J15—RS485_1_EN*
Shunt
Status
Function Affected Device
IN The RS485 circuit is enabled on UART0.
The UART0 CONSOLE interface and IrDA are
disabled.
IrDA, UART0 CONSOLE
interface, RS485 interface.
OUT The RS485 circuit is disabled on UART0. IrDA, UART0 CONSOLE
interface, RS485 interface.
Note: *To enable the RS485 circuit, the corresponding IrDA/RS232 circuit must be disabled.