PPC-E4-3354_User_Manual.docx
-19-
Rev 1.0 © 2016 EMAC, Inc.
5
Appendix B:
Jumper Settings
JB1
Boot Source Selection
Jumper
Position
Setting
Pins 2 & 3
A
Line pulled LOW
Pins 1 & 2* B
Line pulled HIGH
* Default setting
JB2
Boot Option Selection
Jumper
Position
Setting
Pins 2 & 3* A
Line pulled LOW
Pins 1 & 2
B
Line pulled HIGH
* Default Setting
JB3
Flash Write Protect Selection
Jumper
Position
Setting
Pins 1 & 2
A
Flash Write Disable
Pins 2 & 3* B
Flash Write Enable
* Default Setting
JP7
COM C RS4xx termination
Jumper
Position
Setting
Pins 1 & 2
TRM
Terminated with 124 ohms
Pins 2 & 3* OPN
Open (no termination)
* Default Setting