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参数资料
| 型号： | ST5451D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 1 CHANNEL(S), SERIAL COMM CONTROLLER, PDSO28 |
| 封装： | SO-28 |
| 文件页数： | 11/34页 |
| 文件大小： | 269K |
| 代理商： | ST5451D |
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TYPICAL APPLICATIONS
ST5451 HDLC controller may be used in TE,
NT2, NT12 or LT.
Figures 6 to 8 illustrate three typical applications
in multifunctional TE.
The D channel containing only signalling is proc-
essed by the LAPD controller and routed via a
parallel
P interface to the terminal processor.
The support of the LAPD protocol which is imple-
mented by the HDLC controller device allows in
cost senstive applications the use of a low cost
microprocessor. See fig. 6.
Fig. 7 illustrates a configuration in which the D
channel containing signalling data (SAPI s) as
well as packet switched data (SAPI p) is proc-
essed by two controllers and two independent mi-
croprocessors.
Fig. 8 illustrates a configuration in which one mi-
croprocessor is connected to two controllers via a
DMA controller.
D channel with LAPD signalling data and B chan-
nel LAPB packet data are processed by the same
P. A DMA controller performs device to memory
transfers. It is a typical work station application.
Fig. 9 and 10 illustrate 2 typical applications in
NT2 or exchange.
An NT2 or LT in fig.9 with eight D channel control-
lers connected to the GCI interface handle sub-
scriber 0 to 7. Any GCI compatible transceiver (S
or U) may be used to do the subscriber line inter-
face; a GCI compatible exchange circuit may im-
plement the system interface. This is one decen-
tralized application.
Fig. 10 illustrates a centralized application. Using
a switching net work, it is possible to connect:
up to thirty two 64 Kbit/s channels on a 2 Mb/s
PCM highway to 32 B channel controllers
up to sixty four 64 Kbit/s channels on a 4 Mb/s
PCM highway to 64 B channel controllers
up to two hundred fifty six D channels on a 4 Mb/s
highway to 256 D channel controllers.
S
-
INT
Figure 6: Low cost GCI terminal application
ST5451
19/34
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST5451L | 制造商:Valor 功能描述: |
| ST5451N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:ISDN， Other/Special/Miscellaneous |
| ST5452L | 制造商:Pulse 功能描述:- Bulk |
| ST5453L | 制造商:Pulse 功能描述:- Bulk |
| ST5454L | 制造商:Pulse 功能描述:- Bulk |
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