Phytec phyCORE-167CR, Hardware Manual

Page: 30 / 114

phyCORE-167CR/167CS
20

PHYTEC Meßtechnik GmbH 2002 L-527e_8
3.2 J2 Internal or External Program Memory
At the time of delivery, Jumper J2 is closed at 2+3. This default
configuration means that the program stored in the external program
memory is executed after a hardware reset. In order to allow the
execution of a specific controller’s internal program memory,
Jumper J2 must be closed at 1+2.
The following configurations are possible:
Code Fetch Selection J2
Execution from external program memory 2 + 3*
Execution from internal program memory 1 + 2
* = Default setting
Table 4: J2 Code Fetch Selection
3.3 J3 Flash Addressing
Jumper J3 connects the controller’s address line A20 with the
address line A19 on the Flash device (U1). If using a Flash
memory with a capacity of less than 2 MB, Jumper J3 must
remain open in order to avoid conflict with the second CAN
interface
1
. If a 2 MB Flash device populates the
phyCORE-167CR/167CS, then Jumper J3 must be closed. In this
case, the second CAN interface must be rerouted to and
connected at Port P8
2
in order to avoid conflict with the upper
address lines.
1
: The second CAN interface is only available on the C167CS controller (refer to the User‘s
Manual and Data Sheet).
2
: The feature that reroutes CAN signals to port P8 is only available on the C167CS controller.