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參數(shù)資料
| 型號(hào)： | PEF2015 |
| 廠商： | SIEMENS A G |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Mini IOM-2 Controller MICO |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO28 |
| 文件頁(yè)數(shù)： | 26/84頁(yè) |
| 文件大?。?/td> | 1568K |
| 代理商： | PEF2015 |
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PEF 2015
Operational Description
Semiconductor Group
26
12.97
The
"pre-processed channel"
option must always be applied to two consecutive time
slots. The first of these time slots must have an even time slot number. If two time-slots
are declared as "pre-processed channels", the first one can be accessed by the monitor/
feature control handler, which gives access to the frame via a 16-byte FIFO. Although
this function is mainly intended for IOM- or SLD-applications, it could also be used to
transmit or receive a "burst" of data to or from a 64-kbit/s channel. The second pre-
processed time slot, the odd one, is also accessed by the
μ
P. In downstream direction a
4-, 6- or 8-bit static value can be transmitted. In upstream direction the received 8-bit
value can be read. Additionally, a change detection mechanism will generate an interrupt
upon a change in any of the selected 4, 6 or 8 bits.
Pre-processed channels are usually programmed after Control Memory (CM) reset
during device initialization. Resetting the CM sets all CFI time slots to unassigned
channels (CM code '0000'). Of course, pre-processed channels can also be initialized or
re-initialized in the operational phase of the device.
To program a pair of pre-processed channels the correct code for the selected handling
scheme must be written to the CM.
Figure 9
gives an overview of the available pre-
processing codes and their application. For further detail, please refer to
chapter 5.5
of
the EPIC User’s Manual 02.97.
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