Jumper Layout
PHYTEC Meßtechnik GmbH 2000 L-525e_2
21
3.5
Interrupt-Push-Button JP18
Each of the interrupt inputs of the target can be connected to push-
button S5. This allows to generate an external interrupt in order to test
interrupt service routines. It is possible to close more than one jumper
at the same time, i.e. to connect push-button S5 to multiple interrupts.
Jumper
default Description
JP18
JP18 connects push-button S5 to an interrupt
input of the target.
1+2
X
Connects /IRQ0 to the push-button.
3+4
Connects /IRQ1 to the push-button.
5+6
Connects /IRQ2 to the push-button.
7+8
Connects /IRQ3 to the push-button.
9+10
Connects /IRQ4 to the push-button.
11+12
Connects /IRQ5 (MODCK1) to the push-
button.
13+14
Connects /IRQ6 (MODCK2) to the push-
button.
15+16
Connects /IRQ7 (MODCK3) to the push-
button.
/IRQ5 to /IRQ7 are double action inputs. While /PORESET is active,
the target processor reads the status of these signals to determine the
default clock operating mode. Ensure that push-button S5 is not
pressed while /PORESET is active if jumper JP18 is closed at 11+12,
13+14 or 15+16, i.e. ensure that signals connected to /IRQ5 to /IRQ7
remain in tristate while /PORESET is active.
