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參數(shù)資料
| 型號： | UPD6708 |
| 廠商： | NEC Corp. |
| 英文描述： | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| 中文描述： | IEBusa設(shè)備布薩間協(xié)議控制大規(guī)模集成電路 |
| 文件頁數(shù)： | 7/72頁 |
| 文件大?。?/td> | 292K |
| 代理商： | UPD6708 |
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7
μ
PD6708
2.2 IEBus Communication Protocol
An overview of the IEBus is as follows.
Communication system: Half-duplex asynchronous communication
Multi-master system
All the units connected to the IEBus can transfer data to the other units.
Broadcast communication function (communication between one unit and multiple units)
Group broadcast communication:
Broadcast communication with group units
General broadcast communication: Broadcast communication with all units.
Three modes with different transfer speeds selectable.
f
X
= 12 MHz
f
X
= 12.58 MHz
Maximum Number of Transfer Bytes
(bytes/frame)
Mode 0
Approx. 3.9 Kbps
Approx. 4.1 Kbps
16
Mode 1
Approx. 17 Kbps
Approx. 18 Kbps
32
Mode 2
Approx. 26 Kbps
Approx. 27 Kbps
128
Access control: CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
The priority order for bus occupancy is as follows.
<1>
Broadcast communication takes precedence over ordinary communication (i. e., communication between one
unit and another).
<2>
The lowest master address has the highest priority.
Communication scale
Number of units:
Cable length:
Load capacity:
MAX. 50
MAX. 150 m (with twisted-pair cable <Resistance: 0.1
/m or less>)
MAX. 8000 pF <between BUS– and BUS+>, f
X
= 12 MHz
MAX. 7100 pF <between BUS– and BUS+>, f
X
= 12.58 MHz
Terminating resistor: 120
#
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| UPD6708CX | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS | IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD6708CX | 制造商:NEC 制造商全稱:NEC 功能描述:IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS | 制造商:NEC 制造商全稱:NEC 功能描述:IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI |
| UPD6708GS(A) | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD67100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
| UPD67101 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
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