Real Time Devices AD1200 User Manual page 137

W -8254 Timer/Counter UO Configuration
The 8254 must be configured witlt the tiree jumpers placed between the pins as shown in Figure D-2. This
configuration is the same as the factory setting. After setting the jumpers, verify that each is in the proper location.
Any remaining jumpers must be removed from the P7 header connector.
P7
H
;l
:l
I
XTAL
EC1
oTl
XTAL
EC2
PCK
ET
Fig. D-2 -8254 Timer/Counter Clock Source Jumpers, P7
P8 - Interrupts
To select an IRQ channel and an intemrpt soruce, you must install three jumpers on this header connector. To
configure this header for SIGNAL*MATH, place one jumper across the pins of your desired IRQ channel, place the
second jumper across the pins labeled EOC, and place third jumper across the pins labeled G. Make certain that
there are no other jumpers on this connector. Also, make sure that the IRQ channel you have selected is not used by
any other device in your system. Figure D-3 shows you how to configure P8 for IRQ channel 3.
oT2
EOC
DMA
IRQT
IHQ6
IRQs
IRQ4
IRQ3
IRQ2
Fig. D-3 - Interrupts and Interrupt ChannelJumpers, p8
P8
ET
D-4