Input/Output Signal Application - Intel EP80579 Manual

Local Expansion Bus (LEB) Interface—Intel
Table 91. Address, Data and Control Star Topology Routing Guidelines (Sheet 2 of 2)
Address\Data\Control to Other Signals
Spacing
Buffer Address\Data\Control Breakout
Length (LADC_Brk_out)
EP80579 Address\Data\Control
(LADC_Total)
EP80579 Address\Data\Control
Breakin Length (LADC_Brk_out)
Breakout\Breakin Spacing (e2e)
TL1
TL2
TL3
22.3.6

Input/Output Signal Application

The LEB controller has a total of 17 input/output interfacing signals, which might
required special pull-up resistors. This can occur when the interface is not connected to
a devices or simply not being used.
EX_ADDR[24:0]
EX_DATA[15:0]
EX_BE[1:0]#
EX_PARITY[1:0]
EX_RD#
EX_WR#
®
Intel EP80579 Integrated Processor Product Line
Order Number: 320068-005US
®
EP80579 Integrated Processor Product Line
Parameter
Input/Output
• Address Bus
• Can be left NC when the interface is not connected
to an interfacing device or not used.
• Data Bus
• Can be left NC when the interface is not connected
to an interfacing device or not used.
• Bus Byte Enable
• Can be left NC when the interface is not connected
to an interfacing device or not used.
• Bus Parity
• Can be left NC when the interface is not connected
to an interfacing device or not used.
• Bus Read
Note: The EP80579 requires a 2 nSec hold time
during read accesses. Requires to delay
EX_RD# signal if the interfacing device cannot
meet the Thold=2nSec time required by the
EP80579.
• Can be left NC when the interface is not connected
to an interfacing device or not used.
• Bus Write
• Can be left NC when the interface is not connected
to an interfacing device or not used.
Routing Constraints
10 mils (min)
1 inch (max)
max = 8 inch
1 inch (max)
4 mils (min)
5 inch(max)
4 inch(max)
1.5 inch(max)
12 mils (min)
1 inch (max)
max = 8 inch
1 inch (max)
4 mils (min)
5 inch(max)
4 inch(max)
1.5 inch(max)
May 2010
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