Rev. 1.43
User's
Guide
25
3.4. Jumper: J2
A jumper with six positions provides some basic functions.
Figure 8: Jumper J2 location
Position 1
BootBank1
Description
Unplugged
The board boots on the Flash memory bank 0
Plugged-in
The board boots on the Flash memory bank 1
Description:
This jumper is used to define which Flash memory bank is the boot bank.
The VSBC-6862 as two Flash memory banks.
The usage of this jumper allows the user to reverse the bootable bank.
This function will be very helpful to test new software versions during software
debugging.
This provides the facility to come back with the previous software version
loaded in the other bank.
Position 2
ResetConf
Factory setting
Description
Unplugged
X
The RSTCONF pin is at GND: normal operation
Plugged-in
The RSTCONF pin is at VCC
Description:
This jumper is used to force the PowerQUICC II to use the default ResetWord.
The main usage of this jumper is to boot the board for the first time, before the Flash
memory is loaded with the ResetWord.
The board must not function more than few minutes using the default ResetWord.
This is due to the internal clocks sets a little bit higher than normal with default values.
For more information, please consult the MPC-8260 User's manual.
For normal operation, this jumper must never be plugged-in.
Position 3
Power On Reset
Factory setting
Description
Unplugged
X
No external Power-On reset: normal operation
Plugged-in
External Power-On Reset
Description:
This jumper provides the ability to generate an external power-on Reset on the board.
This input is internally debounced, it doesn't need external debouncing logic.
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Содержание VSBC-6862
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