- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367820 > PCI-PIO KARTE E/A 48 KANAL PCI BUS PDF資料下載
參數(shù)資料
| 型號(hào)： | PCI-PIO |
| 英文描述： | KARTE E/A 48 KANAL PCI BUS |
| 中文描述： | KARTE E / A值48卡納爾PCI總線 |
| 文件頁數(shù)： | 12/24頁 |
| 文件大?。?/td> | 81K |
| 代理商： | PCI-PIO |
Page 6
Programming Details
Chapter 3
Page 6
01270187.doc
Blue Chip Technology Ltd.
CHAPTER 3
PROGRAMMING DETAILS
This chapter provides details of the cards internal registers.
The board’s input/output facilities are provided by two Intel i8255, or NEC
μPD71055 PIO devices (compatible with the Intel part) and an Intel i8254, or
NEC μPD71054 Counter/timer (compatible with the Intel part).
Each PIO provides 24 programmable digital I/O channels. It is suitable for
sensing the presence of, or driving TTL connections only. These connections
should be kept as short as possible, less than 2 metres is recommended.
Each PIO appears to the PC as four I/O addressable registers. The first three
registers control the I/O ports which can be set as input or output by writing
suitable codes to the fourth Control Port.
Three modes of operation are available within the device:-
Mode 0 is for general purpose I/O and allows all three ports to be configured as
either inputs or outputs.
Mode 1 is for full duplex parallel communication and allows one port to be
configured for inputs, another for outputs and the third as transfer handshake
lines and interrupt sources.
Mode 2 is for half duplex parallel data communication, and allows one port to
be configured for data transfer I/O, a second as transfer handshake lines and an
interrupt source, and the third as a general purpose I/O port (similar to mode 0).
For mode 0, a summary of the codes required to change the operation of the
ports are given later. A typical sequence of events to use this feature would be :
Decide on the mix of input/outputs required and write the appropriate
code to the Control Register.
Read from the selected input port or write to the selected output port.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCI-WDT | UEBERWACHUNGSKARTE PLUG AND PLAY |
| PCI-WIN2000 | WINDOWS 2000 FOR PCI DATA ACQU |
| PCI01 | Periphelar Coupled Input NPN |
| PCI350-4801NT | 350 Watt CompactPCI Power Supply |
| PCI350-4801SL | 350 Watt CompactPCI Power Supply |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCI-PXI-EXP-KIT | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 PCIe TO PCI EXPANSION KIT RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| PCI-RTV24 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-CH PCI Express?? / PCI Real-time Video Capture Cards for Standard Cameras |
| PCIRX4-B5-1.25 | 制造商:Sliger Designs, Inc. 功能描述:PCI 32 BIT RIGHT ANGLE RISER FOR 1.5U CAE CHASSIS. - Bulk |
| PCIRX4-FLEX-B5-1.25 | 制造商:Sliger Designs, Inc. 功能描述:PCI 32 BIT RIGHT ANGLE RISER FOR 1.5U CAE CHASSIS. - Bulk |
| PCIRX4FLEXB52 | 制造商:Sliger Designs, Inc. 功能描述:RISER CARD - Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。