- 您现在的位置：买卖IC网 > PDF目录378049 > PEF2080 (SIEMENS AG) S/T Bus Interface Circuit(SBC) PDF资料下载
参数资料
| 型号： | PEF2080 |
| 厂商： | SIEMENS AG |
| 英文描述： | S/T Bus Interface Circuit(SBC) |
| 中文描述： | S / T的总线接口电路（SBC）的 |
| 文件页数： | 34/74页 |
| 文件大小： | 2620K |
| 代理商： | PEF2080 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页当前第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页
Semiconductor Group
35
Functional Description
2.5
Additional Functions
Test Functions
Test loops
Two kinds of test loops may be closed in the SBC, which depend on the selected mode of operation.
In both test loops, all three channels (B1, B2 and D) are looped back. In a “transparent loop” the
data are also sent forward (in addition to being looped back), whereas in a “non-transparent loop”
the forward data path is blocked (CCITT I.430). These test loops are shown in
figure 17
.
Figure 17
Test Loops of SBC
Test loop 3 is activated with the C/l channel command Activate Request Loop (ARL). An S interface
is not required since INFO3 is looped back to the receiver. When the receiver has synchronized
itself to this signal, the message “Test Indication’’ (or “Awake Test Indication”) is delivered in the C/l
channel. No signal is transmitted over the S interface.
Test loop 2 is likewise activated over the IOM interface with Activate Request Loop (ARL). No S line
is required. INFO4 is looped back to the receiver and also sent to the S interface. When the receiver
is synchronized, the message “AIU” is sent in the C/l channel. In the test loop mode the S-interface
awake detector is disabled, and echo bits are set to logical “0”.
相关PDF资料 |
PDF描述 |
|---|---|
| PEF22554 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| PEF22554E | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| PEF22554HT | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| PEF2256 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| PEF2256E | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PEF2080-N | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:S/T Bus Interface Circuit(SBC) |
| PEF2091 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:ICs for Communications(ISDN Echocancellation Circuit) |
| PEF2091F | 制造商:未知厂家 制造商全称:未知厂家 功能描述:?ISDN Echocancellation Circuit - 2B1Q Code? |
| PEF2091FV5.3 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:ICs for Communications(ISDN Echocancellation Circuit) |
| PEF2091HV5.3 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:ICs for Communications(ISDN Echocancellation Circuit) |
发布紧急采购，3分钟左右您将得到回复。