Zilog EZ80F91 - Manual (Page 44)

eZ80F91 Development Kit
User Manual
UM014220-0508 eZ80 Development Kit
39
Jumper J19
The J19 jumper connection selects the range of memory addresses for the
external chip select signal, CS_EX, to the application module. See
Table 26 .
Table 25. J18—RT_2*
Shunt
Status
Function Affected Device
IN The Termination Resistor for RS485_2 is IN. RS-485 interface.
OUT The Termination Resistor for RS485_2 is OUT. RS-485 interface.
Note: *Before enabling the termination resistor, ensure that the device is located at the end of the
interface line.
Table 26. J19—EX_SEL
Shunt
Status
Function Affected Device
1–2 CS_EX is decoded in the CS0 memory space and is
located in the address range 400000h–7FFFFFh. Application module
addressing.
3–4 CS_EX is decoded in the CS2 memory space and is
located in the address range A00000h–A7FFFFh. Application module
addressing.
5–6 CS_EX is decoded in the CS2 memory space and is
located in the address range A80000h–AFFFFFh. Application module
addressing.
7–8 CS_EX is decoded in the CS2 memory space and is
located in the address range B00000h–B7FFFFh. Application module
addressing.