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參數(shù)資料
| 型號： | 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)： | 15/24頁 |
| 文件大?。?/td> | 81K |
| 代理商： | PCI-PIO |
Chapter 3
Programming Details
Page 9
Blue Chip Technology Ltd.
01270187.doc
Page 9
In Mode 2, data is transferred via one bi-directional 8 bit port (A) with
handshaking (port C). These handshaking signals may be used to drive interrupt
channels if required.
Refer to the i8255 or μPD71055 data sheet for full details of the settings and use
of Modes 1 and 2.
i8254 / μPD71054 Counter / Timer
The counter/timer circuit contains three independent 16-bit counters which may
be operated in a variety of modes. There are five basic modes of operation with
each mode providing a different output signal. Presented here is a brief
summary of some of the modes possible by programming the counter / timer’s
internal registers.
All three counter/timers may be operated independently, with separate clocks
and enable controls.
Counter 0, Counter 1 and Counter 2 may be connected in series. Counter 0
output to Counter 1 clock input and/or Counter 1 output to Counter 2 clock
input, to allow the facility of generating very long delay periods.
The outputs from any counter/timer may be configured to generate an interrupt
when going high or low, and may also be made accessible on the back panel
connector.
The clock and enable inputs of the counter/timers may also be made accessible
on the back panel connector.
Counter / Timer Modes
The following modes of operation exist by programming the control register
within the i8254 / μPD71054. N.B. The interrupts may be generated when the
Counter/timer outputs go low or high, selected by bits in the counter control
registers.
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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 |
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