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參數資料
| 型號： | a8237 |
| 廠商： | Altera Corporation |
| 英文描述： | programmable DMA Controller(可編程DMA控制器) |
| 中文描述： | 可編程DMA控制器（可編程DMA的控制器） |
| 文件頁數： | 1/22頁 |
| 文件大?。?/td> | 269K |
| 代理商： | A8237 |
Altera Corporation
5
a8237
Programmable
DMA Controller
April 1999, ver. 1.01
Data Sheet
A-DS-A8237-01.01
Features
I
a8237
MegaCore function implementing a programmable direct
memory access (DMA) controller
Optimized for FLEX
architecture
Provides four independent channels
Offers static read/write or handshaking modes
Includes direct bit set/reset capability
Uses approximately 1,201 FLEX logic elements (LEs)
Functionally based on the Intel 8237A and Harris 82C37A devices,
except as noted in
“Variations & Clarifications” on page 24
I
I
I
I
I
I
General
Description
The
a8237
MegaCore function implements a programmable DMA
controller, which controls memory-to-peripheral and memory-to-
memory data transfers and provides block memory initialization
capability. Four independently programmable channels are available in
the
a8237
, and DMA requests can be made via hardware or software.
Figure 1
shows the symbol for the
a8237
.
Figure 1. a8237 Symbol
clk
hlda
ncs
neopin
niorin
niowin
ready
reset
ain[3..0]
dbin[7..0]
dreq[3..0]
adstb
aen
dben
dmaenable
hrq
neopout
niorout
niowout
nmemr
nmemw
aout[7..0]
dack[3..0]
dbout[7..0]
A8237
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|---|---|
| A8237 | PROGRAMMABLE DMA CONTROLLER |
| a8251 | Programmable Communications Interface(可編程通信接口) |
| a8255 | Programmable Peripheral Interface Adapter(可編程外圍接口適配器) |
| A8255 | PROGRAMMABLE PERIPHERAL INTERFACE ADAPTER |
| a8259 | Programmable Interrupt Controller(可編程中斷控制器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| A82370-16 | 制造商:Rochester Electronics LLC 功能描述: |
| A82380-16 | 制造商:Intel 功能描述:PERIPHERAL (MULTIFUNCTION) CONTROLLER, 132 Pin, PGA |
| A82380-20 | 制造商:Rochester Electronics LLC 功能描述: |
| A82380-25 | 制造商:Rochester Electronics LLC 功能描述: |
| A82385-16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Cache Controller |
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