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参数资料
| 型号： | IS82C37A |
| 厂商： | HARRIS SEMICONDUCTOR |
| 元件分类： | DMA控制器 |
| 英文描述： | RES CHP 2.2K 1/8W 5% |
| 中文描述： | 4 CHANNEL(S), 8 MHz, DMA CONTROLLER, PQCC44 |
| 文件页数： | 13/23页 |
| 文件大小： | 204K |
| 代理商： | IS82C37A |
4-204
82C37A
Figure 7 shows an application for a DMA system using the
82C37A DMA controller and the 80C286 Microprocessor.
In this application, the system clock comes from the 82C284
clock generator PCLK signal which is inverted to provide
proper READY setup and hold times to the DMA controller in
an 80C286 system. The Read and Write signals from the
DMA controller may be wired directly to the Read/Write con-
trol signals from the 82C288 Bus Controller. The octal latch
for A8-A15 from the DMA controller’s data bus is on the local
80C286 address bus so that memory chip selects may still
be generated during DMA transfers. The transceiver on A0-
A7 is controlled by AEN and is not necessary, but may be
used to drive a heavily loaded system address bus during
transfers. The data bus transceivers simply isolate the DMA
controller from the local microprocessor bus and allow pro-
gramming on the upper or lower half of the data bus.
FIGURE 7. 80C286 DMA APPLICATION
MEMW
MEMR
MEMCS
MEMORY
A0 - A23
IOW
DACK
I/O
IOR
SYSTEM
BUS
A
TRANSCEIVER
OE
T/R
DEVICE
DREQ
CS
D0 - D15
TRANS-
CEIVER
TRANS-
CEIVER
LATCH
STB
OE
AEN
D0-D7
V
CC
A0-A7
IOR
IOW
MEMR
MEMW
DACK 0-3
D0-D7
DREQ 0-3
EOP
AEN
ADSTB
HRQ
HLDA
CLK
READY
82C37A
IOR
IOW
MEMR
MEMW
TO CORRESPONDING
82C288 SIGNALS AND
MEMORY/PERIPHERALS
D
TRANSCEIVER
LATCH
D
A
DECODE
CHIP SELECT
TO MEMORY/
PERIPHERALS
80C286
A0-A23
D0-D15
READY
HLD
HLDA
CLK
IORC
IOWC
MRDC
MWTC
IOR
IOW
MEMR
MEMW
CLK
82C288
82C284
CLK
PCLK
READY
相关PDF资料 |
PDF描述 |
|---|---|
| IS82C37A-5 | CMOS High Performance Programmable DMA Controller |
| IS82C55A | 30 AMP MINIATURE POWER RELAY |
| IS82C55A-5 | CMOS Programmable Peripheral Interface |
| IS82C55A | CMOS Programmable Peripheral Interface |
| IS82C55A-5 | CMOS Programmable Peripheral Interface |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IS82C37A-12 | 制造商:HARRIS 制造商全称:HARRIS 功能描述:CMOS High Performance Programmable DMA Controller |
| IS82C37A-5 | 功能描述:外围驱动器与原件 - PCI DMA CONTROLLER IC -4 0+85C 5.0V 5.0MHZ DM RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| IS82C50A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:UART |
| IS82C50A-5 | 功能描述:UART 接口集成电路 PERIPH UART/BRG 5V 10MHZ 44PLCC IND RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| IS82C50A-5Z | 功能描述:UART 接口集成电路 W/ANNEAL PERIPH UART /BRG 5V 10MHZ RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
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