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參數(shù)資料
| 型號： | CL-PD6722 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | ISA-TOOPC-CARD HOST ADAPTERS |
| 中文描述： | ISA的TOOPC卡主機適配器 |
| 文件頁數(shù)： | 25/128頁 |
| 文件大?。?/td> | 1591K |
| 代理商： | CL-PD6722 |
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CL-PD6710/’22
ISA–to–PC-Card Host Adapters
May 1997
25
PRELIMINARY DATA SHEET v3.1
INTRODUCTION
3.1.3
CL-PD67XX Functional Blocks
Figure 3-3. Functional Block Diagram
Operation
Registers
Mapper
and
Offset
Socket
Bus Control
Socket
Write
FIFO
Power Control
Interrupt
Control
Synthe-
sizer
Bus
Interface
Unit
Per Chip
Per Socket
Control
Data
Address
V
CC
Control
V
PP
Control
Control
Address
Data
Clock
INTR
IRQs
Timing Control
-WAIT
WP/-IOIS16
CD1, CD2
BVD, -STSCHG
RDY/-IREQ
3.1.4
Interrupts
The CL-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 inter-
rupt pins should be connected to system interrupt
signals to allow maximum flexibility in programming
interrupt routing from the CL-PD67XX.
Classes of Interrupts
The CL-PD67XX supports two classes of interrupts:
G
Socket or card interrupts initiated by the PC Card
activating its RDY/-IREQ signal
G
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 CL-PD67XX.
Connection of Interrupt Pins
IRQ interrupts in PC-compatible systems are not
generally shared by hardware. Therefore, each
device in the system using IRQ interrupts must have
a unique interrupt line. Additionally, many software
applications assume that certain I/O devices use
specific IRQ signals. To allow PC Cards with differ-
ing I/O functionalities to be connected to appropriate
nonconflicting IRQ locations, the CL-PD67XX can
steer the interrupt signal from a PC Card to any one
of the ten different hardware interrupt lines.
For some I/O-type cards, software is written so that
IRQ interrupts can be shared. The CL-PD67XX con-
tains unique logic that allows IRQ interrupts to be
shared under software control. This is accomplished
by programming the CL-PD67XX to alternately
pulse and then three-state the desired interrupt pin,
which has been programmed as an IRQ output. This
unique IRQ interrupt sharing technique can be con-
trolled through software so that systems incapable
of IRQ sharing have no loss of functionality.
相關PDF資料 |
PDF描述 |
|---|---|
| CL-PS6700 | Low-Power PC Card Controller for the CL-PS7111 |
| CL-PS6700-VC-A | Low-Power PC Card Controller for the CL-PS7111 |
| CL-PS7110-VC-A | Low-Power System-on-a-Chip |
| CL-PS7110-VI-A | Low-Power System-on-a-Chip |
| CL-PS7110 | Low-Power System-on-a-Chip |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CL-PD6722-VC-B | 制造商:Cirrus Logic 功能描述:ELECTRONIC COMPONENT |
| CL-PD6729-QC-C | 制造商:BASIS 功能描述: |
| CLPD6729QCE | 制造商:BASIS 功能描述: |
| CL-PD6729-QC-E | 制造商:CIRRUS LOGIC 功能描述: |
| CL-PD6730-QC-B79030-648AC | 制造商:CL 功能描述:CL-PD6730-QC-B79030- |
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