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參數(shù)資料
| 型號(hào)： | PC87415VCG |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 存儲(chǔ)控制器/管理單元 |
| 英文描述： | PCI-IDE DMA Master Mode Interface Controller |
| 中文描述： | 16.7 Mbps, IDE COMPATIBLE, FIXED DISK CONTROLLER, PQFP100 |
| 封裝： | 20 X 14 MM, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 1/42頁 |
| 文件大?。?/td> | 374K |
| 代理商： | PC87415VCG |
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TL/F/12497
P
PRELIMINARY
March 1996
PC87415
PCI-IDE DMA Master Mode Interface Controller
1.0 General Description
The Enhanced PCI-IDE Interface is a single-chip controller
packaged in a 100-pin PQFP. It provides 2 IDE channels for
interfacing up to 4 IDE drives, or 2 IDE drives and CD-ROM
directly on the PCI Local bus. An enhanced DMA controller
on-chip increases system performance by providing full
scatter/gather data transfers between IDE devices and sys-
tem memory without CPU intervention. Four levels of both
write posting and read prefetching per channel allow the
host CPU to run concurrently with IDE cycles. Programma-
ble timing functions provide maximum flexibility of timing pa-
rameters per drive for optimizing the data transfer rate per
drive. Both PC compatible addressing and PCI compliant
addressing are supported by re-mapping the base address-
es. A power control feature allows turning off power to the
IDE cables.
The Enhanced PCI-IDE Interface connection to the PCI bus
is virtually ‘‘glue-less’’, with only one additional TTL data
buffer (optional). This high-integration solution reduces
component count, eases board design, reduces cost and
increases reliability.
The Enhanced PCI-IDE supports faster ATA devices using
PIO modes 1, 2, 3, and 4 as well as DMA modes 0, 1, and 2.
It comes with a full suite of software drivers for DOS 5.0–
6.x, Windows
é
3.x, Windows
é
95, Windows NT
TM
, OS/2
2.x, Novell
é
NetWare
TM
3.1x–4.x, and SCO UNIX
é
3.x.
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
WATCHDOG
TM
is a trademark of National Semiconductor Corporation.
Novell
é
is a registered trademark of Novell, Inc.
NetWare
TM
is a trademark of Novell, Inc.
Unix
é
is a registered trademark of AT&T Bell Laboratories.
Windows
é
and Windows
é
95 are registered trademarks of Microsoft Corporation.
Windows NT
TM
is a trademark of Microsoft Corporation.
2.0 Features
Y
PCI bus interface for up to 4 IDE devices
Y
33 MHz, 32-bit PCI bus data path with full parity error
reporting
Y
16.7 MByte/sec maximum IDE transfer rate
Y
Support for 2 IDE channels (
@
2 IDE devices per chan-
nel)
Y
Primary or secondary IDE addressing (1F0x/170x) in
PC compatible mode
Y
Re-mappable base registers for full PCI compliance
Y
Concurrent channel operation (PIO & DMA modes)
Y
4 Double Word write FIFO per channel
Y
4 Double Word read prefetch FIFO per channel
Y
Enhanced DMA mode with scatter/gather capability
Y
ANSI ATA Modes 0 through 4 PIO support (internal
DMA not selected)
Y
IORDY handshaking for PIO
Y
ANSI ATA Modes 0 through 2 Multiword DMA support
(internal DMA selected)
Y
Individually programmable command and recovery tim-
ing for reads and writes per channel/drive for com-
mand, control and data
Y
Individually programmable data sector size for read pre-
fetches per channel
Y
PC compatible interrupt routing of IRQ14 and IRQ15
Y
Hardware and software chip enable/disable
Y
Optional Power Control for IDE Drives
Y
Fully static logic design
Y
100-pin PQFP package
TL/F/12497–1
FIGURE 1. The PC87415 in a PCI Based System
C
1996 National Semiconductor Corporation
RRD-B30M46/Printed in U. S. A.
http://www.national.com
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