4 arbitration signals, Table 3.5 arbitration signals, Arbitration signals – Avago Technologies LSI53C1000R User Manual
Page 102
3-8
Signal Descriptions
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
3.3.4 Arbitration Signals
describes the Arbitration Signals group.
STOP/
AB16
S/T/S 8 mA PCI Stop indicates that the selected target is requesting the
master to stop the current transaction.
DEVSEL/
AC16
S/T/S 8 mA PCI Device Select indicates that the driving device has
decoded its address as the target of the current access. As
an input, it indicates to a master whether any device on the
bus has been selected.
IDSEL
AC13
I
N/A
Initialization Device Select is used as a chip select, in
place of the upper 24 address lines, during configuration
read and write transactions.
Table 3.4
Interface Control Signals (Cont.)
Name
Bump
Type
Strength
Description
Table 3.5
Arbitration Signals
Name
Bump
Type
Strength
Description
REQ/
AD10
O
8 mA PCI Request indicates to the system arbiter that this agent
requests use of the PCI bus. This is a point-to-point signal.
Every master has its own REQ/ signal.
GNT/
AE8
I
N/A
Grant indicates to a specific agent that access to the PCI bus
has been granted. This is a point-to-point signal. Every
master has its own GNT/ signal.