Zilog EZ80L92 User Manual
Page 39
eZ80L92 Development Kit
User Manual
UM012913-0407
Operational
Description
35
Jumper J3
The J3 jumper connection controls the mode of the general-purpose port
and communication with the 7 x 5 LED. When the shunt is placed, the
general-purpose port is disabled. See
Jumper J7
The J7 jumper connection controls Flash boot loader programming. When
the shunt is placed, overwriting of the Flash boot loader program is
enabled. See
.
Table 14. J3—DIS_EM
Shunt
Status
Function
Affected Device
IN
Application Module Hardware
Disabled
Communication with 7 x 5 LED and Port
emulation circuit is disabled.
OUT
Application Module Hardware
Enabled
Communication with 7 x 5 LED and the
general-purpose port circuit is enabled.
Table 15. J7—FlashWE
Shunt
Status
Function
Affected Device
OUT
The Flash boot sector of the
eZ80L92 Module is write-
protected.
Flash boot sector of the eZ80L92 Module.
IN
The Flash boot sector of the
eZ80L92 Module is enabled for
writing or overwriting.
Flash boot sector of the eZ80L92 Module.