QL5232 - QuickPCITM
QL5032 External Device Pins
QL5232 External Device Pins
Pin/Bus Name
AD[31:0]
CBEN[3:0]
PAR
FRAMEN
DEVSELN
CLK
RSTN
REQN
GNTN
PERRN
SERRN
IDSEL
IRDYN
TRDYN
STOPN
INTAN
Type
T/S
T/S
T/S
S/T/S
S/T/S
IN
IN
T/S
IN
S/T/S
O/D
IN
S/T/S
S/T/S
S/T/S
O/D
Function
PCI Address and Data: 32 bit multiplexed address/data bus.
PCI Bus Command and Byte Enables: Multiplexed bus which
contains byte enables for AD[31:0] or the Bus Command
during the address phase of a PCI transaction.
PCI Parity: Even Parity across AD[31:0] and C/BEN[3:0]
busses. Driven one clock after address or data phases. Mas-
ter drives PAR on address cycles and PCI writes. The Target
drives PAR on PCI reads.
PCI Cycle Frame: Driven active by current PCI Master dur-
ing a PCI transaction. Driven low to indicate the address
cycle, driven high at the end of the transaction.
PCI Device Select. Driven by a Target that has decoded a
valid base address.
PCI System Clock Input.
PCI System Reset Input
PCI Request. Indicates to the Arbiter that this PCI Agent (Ini-
tiator) wishes to use the bus. A point to point signal between
the PCI Device and the System Arbiter.
PCI Grant. Indicates to a PCI Agent (Initiator) that it has
been granted access to the PCI bus by the Arbiter. A point to
point signal between the PCI device and the System
Arbiter.
PCI Data Parity Error. Driven active by the initiator or target
two clock cycles after a data parity error is detected on the
AD and C/BE# busses.
PCI System Error: Driven active when an address cycle par-
ity error, data parity error during a special cycle, or other
catastrophic error is detected.
PCI Initialization Device Select. Use to select a specific PCI
Agent during System Initialization.
PCI Initiator Ready. Indicates the Initiator’s ability to com-
plete a read or write transaction. Data transfer occurs only
on clock cycles where both IRDYN and TRDYN are active.
PCI Target Ready. Indicates the Target’s ability to complete
a read or write transaction. Data transfer occurs only on
clock cycles where both IRDYN and TRDYN are active.
PCI Stop. Used by a PCI Target to end a burst transaction.
Interrupt A. Asynchronous Active-Low Interrupt Request.
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PreliRmev iBnary