3 expansion bus, Expansion bus – Kontron MSM800BEV User Manual
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DEVSEL*
Device Select is driven by the target device when its address is decoded.
IDSEL
Initialization Device Select is used as a chip-select during configuration.
LOCK*
Lock indicates an operation that may require multiple transactions to complete.
PERR*
Parity Error is for reporting data parity errors.
SERR*
System Error is for reporting address parity errors.
REQ*
Request indicates to the arbitrator that this device desires use of the bus.
GNT*
Grant indicates to the requesting device that access has been granted.
CLK
Clock provides timing for all transactions opn the PCI bus.
RST*
Reset is used to bring PCI-specific registers to a known state.
INTA*
Interrupt A is used to request Interrupts.
INTB*
Interrupt B is used to request Interrupts only for multi-function devices.
INTC*
Interrupt C is used to request Interrupts only for multi-function devices.
INTD*
Interrupt D is used to request Interrupts only for multi-function devices.
7.1.3 Expansion Bus
The bus currents are as follows:
Output Signals
IOH
IOL
D0-D16
8 mA
8 mA
A0-A23
8 mA
8 mA
MR, MW, IOR, IOW, RES, ALE, AEN, C14
8 mA
8 mA
DACKx, DRQx, INTx, PSx, OPW
8 mA
8 mA
Input Signals
Logic Family
Voltage
ABT-Logic
ViH (min.) = 2.15 V
ABT-Logic
Vil (max.) = 0.85 V