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SPD6722QCCE Datasheet(PDF) 71 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) 71 Page - Intel Corporation

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ISA-to-PC-Card (PCMCIA) Controllers — PD6710/’22
Datasheet
71
Bit 3 — Pulse System IRQ
This bit selects Level or Pulse mode operation of the IRQ[XX] pins for interrupts from a PC Card
RDY/-IREQ pin ( Table 2).
Bit 4 — Speaker Enable
This bit determines whether the card -SPKR pin will drive SPKR_OUT* ( Table 1).
Bit 7 — Inpack Enable
This bit is used to determine when to drive data onto the ISA bus.
Figure 11. Pulse Mode Interrupts
-INTR or
High-Z
High-Z
IRQ[XX]
Driven low
Driven high
0
RDY/-IREQ generated interrupts are passed to the IRQ[XX] pin as level-sensitive.
1
When a RDY/-IREQ interrupt occurs, the IRQ[XX] pin is driven with the pulse train shown in
Figure 11 and allows for interrupt sharing.
0
SPKR_OUT* is high-impedance.
1
SPKR_OUT* is driven from the XOR of -SPKR from each enabled socket.
0
-INPACK pin (Table 2) ignored.
1
-INPACK pin used to control data bus drivers during I/O read from the socket.


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