Intel EP80579

Intel
®
EP80579 Integrated Processor Product Line May 2010
Order Number: 320068-005US 306
Schematics Checklist—Intel
®
EP80579 Integrated Processor Product Line
EX_CS[7:0]# I/O
• External Chip Selects for the
Expansion Bus Peripheral
Devices
• Pull-up to Platform 3.3V (VCC3)
supply through a 10 KΩ ±5%
resistor
Expansion Bus Target Chip Selects: Chip
selects to select Expansion Bus devices.
• Devices using EX_CS[3:0]# indicate
Data Ready with EX_IOWAIT#
during EP80579 Read accesses
• Devices using EX_CS[7:4]# indicate
Data Ready with EX_RDY[3:0]#
during EP80579 Read accesses
Note:
• Must be pulled high through a 10
KΩ resistor when the interface is not
used or connected to an interfacing
device.
EX_DATA[15:0],
EX_WR#
EX_RD#
I/O
• Bi-directional Expansion Bus
data/ Expansion Write
Command/ Expansion Bus Read
Command.
• Isolate DATA/ WR#/RD# to
Platform on-board devices from
inbound/outbound devices
using an external data buffer.
• Buses to all on-board devices
are isolated from each other
using 22Ω ±5% series resistors.
•See Section 22.3.4 for more details.
Note: EP80579 requires a 2nSec hold
time during read accesses.
Requires to delay EX_RD#
signal by 2ns(min) if the
interfacing device cannot meet
the Thold=2nSec time required
by EP80579.
Note:
• Can be left as no connect (NC)
when the interface is not connected
to an interfacing device or not used
EX_IOWAIT# I
• Data ready/acknowledge from
expansion bus devices
• Pull-up to Platform 3.3V (VCC3)
supply through a 10 KΩ ±5%
resistor
• An expansion bus access is halted
when an external device asserts
EX_IOWAIT# and resumes access
from the halted location once the
external device de-asserts
EX_IOWAIT#
• Expansion Bus Devices using
EX_CS[3:0]# indicate Data Ready
with EX_IOWAIT# during EP80579
Read Accesses.
Note:
• Must be pulled high through a 10
KΩ resistor when the interface is not
used or connected to an interfacing
device
EX_PARITY[1:0] I/O
• Byte wide parity protection on
inbound/outbound transfers.
Note:
• Can be left as no connect (NC)
when the interface is not connected
to an interfacing device or not used
Table 100. Schematic Checklist (Sheet 23 of 26)
Checklist Items
I/O Type
(Default)
Recommendations Comments