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SPD6722QCCE Datasheet(PDF) 30 Page - Intel Corporation

Part No. SPD6722QCCE
Description  ISA-to-PC-Card (PCMCIA) Controllers
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Maker  INTEL [Intel Corporation]
Homepage  http://www.intel.com
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SPD6722QCCE Datasheet(HTML) 30 Page - Intel Corporation

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PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers
30
Datasheet
4.1.3
PD67XX Functional Blocks
4.1.4
Interrupts
The PD67XX provides ten interrupt pins that are labeled with names suggesting their mapping in
the system, though there are no hard requirements specifying the exact mapping. Typically, all ten
interrupt pins should be connected to system interrupt signals to allow maximum flexibility in
programming interrupt routing from the PD67XX.
Classes of Interrupts
The PD67XX supports two classes of interrupts:
Socket or card interrupts initiated by the PC Card activating its RDY/-IREQ signal
Management interrupts triggered by changes in PC Card status, including:
— Card insertion or removal
— Battery warning indicator (BVD2) change on a memory-type card
— Battery dead indicator (BVD1) or I/O-type card status change (-STSCHG)
— Ready (RDY) status change on a memory-type card
Either class of interrupts can be routed to any of the ten interrupt pins on the PD67XX.
Figure 7. Functional Block Diagram
Operation
Registers
Mapper
and
Offset
Socket
Socket
Write
FIFO
Power Control
Interrupt
Control
Synthe-
Bus
Interface
Unit
sizer
Per Chip
Per Socket
Control
Data
Address
VCC Control
VPP Control
Control
Address
Data
Clock
INTR
IRQs
Bus Control
Timing Control
-WAIT
WP/-IOIS16
CD1, CD2
RDY/-IREQ
BVD, -STSCHG


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