- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366309 > a8237 (Altera Corporation) programmable DMA Controller(可編程DMA控制器) PDF資料下載
參數(shù)資料
| 型號(hào)： | 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(shù)： | 4/22頁 |
| 文件大?。?/td> | 269K |
| 代理商： | A8237 |
8
Altera Corporation
a8237 Programmable DMA Controller Data Sheet
Functional
Description
Figure 2
shows a block diagram of the
a8237
MegaCore function.
Figure 2. a8237 Block Diagram
Programming
Several registers in the
can be executed. However, to avoid unpredictable behavior, disable the
DMA cycles during programming by setting bit 2 of the command
register.
a8237
must be programmed before DMA cycles
ncs
neopin
niorin
niowin
ready
reset
ain[3..0]
dbin[7..0]
hrq, aen, adstb
niorout, niowout
nmemr, nmemw
dben, dmaenable, neopout
aout[7..0]
aout[15..8]
to dbout[7..0]
DMA Address Registers
Channel 0
Base
Channel 1
Base
Channel 2
Base
Channel 3
Base
Temporary
Register
Channel 0
Current
Channel 1
Current
Channel 2
Current
Channel 3
Current
Other
Registers
to
Control
Logic
DMA Word Count Registers
Channel 0
Base
Channel 1
Base
Channel 2
Base
Channel 3
Base
Temporary
Register
Channel 0
Current
Channel 1
Current
Channel 2
Current
Channel 3
Current
aout[15..8]
dbout[7..0]
dreq[3..0]
dack[3..0]
Internal
Control
Signals
Control
Logic
(State Machine
and Decoder)
Status
Register
Request
Register
Mask
Register
Temporary
Register
Command
Register
Request
Priority
Encoder
Data
Output
Multiplexer
hlda
clk
Mode
Registers
Channel 0
Channel 1
Channel 2
Channel 3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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(guān)代理商/技術(shù)參數(shù) |
參數(shù)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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。