Jumpers
PHYTEC Messtechnik GmbH 2005 L-602e_3
17
3.3
J4 PLD Control
An address decoder (PLD) populates the phyCORE-P8xC51Mx2 at
U4. At time of delivery, Jumper J4 is closed at position 1+2 which
enables the PLD. The address decoder can be disabled. This requires
changing the jumper setting to 2+3.
The following configurations are possible:
PLD Mode
J4
PLD enabled
1 + 2*
PLD disabled
2 + 3
*= Default setting
Table 5:
J4 PLD Control
3.4
J5, J6 RAM Selection
Both standard RAM types or high-speed devices can populate the
phyCORE-P8xC51Mx2 at U5 and U6. If high-speed RAMs are used,
Jumpers J5 and J6 disable the delay of the /CS signal that controls the
memory device. With Jumpers J5 and J6 closed no battery buffer for
RAM is possible.
The following configurations are possible:
PLD Mode
J5, J6
standard RAM
open*
High-speed RAM
closed
*= Default setting
Table 6:
J5, J6 RAM Selection and Mode
Содержание phyCORE-P8xC51Mx2
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Страница 22: ...phyCORE P8xC51Mx2 14 PHYTEC MMesstechnikGmbH 2005 L 602e_3 Figure 7 Location of the Jumpers Bottom View...
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Страница 82: ...Published by PHYTEC Messtechnik GmbH 2005 Ordering No L 602e_3 Printed in Germany...