參數(shù)資料
型號(hào): PSB21911
廠商: SIEMENS A G
元件分類: 數(shù)字傳輸電路
英文描述: ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE
中文描述: DATACOM, ISDN ECHO CANCELLER
文件頁(yè)數(shù): 59/164頁(yè)
文件大小: 1401K
代理商: PSB21911
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PSB 21911
PSF 21911
U-Transceiver
Semiconductor Group
59
11.97
2.5.5
Local Functions (MON-8)
Local functions are controlled via MON-8-commands. The following tables give an
overview of structure and features of commands belonging to this category.
Format of MON-8-Messages
r:
Register address – 0 = local function register
– 1 = internal register
D0…7 Local command – 00 … FF
H
= local function code
– 00 … FF
H
= internal register address
The following local commands are defined. If a response is expected, it will comprise 4
bytes (2 messages a 2 bytes) if the value of an internal coefficient is returned, and 2
bytes in all other cases.
In a two-byte response the first byte will indicate that a MON-8 answer is transmitted, the
second byte contains the requested information. This procedure is repeated for a four-
byte transfer (MON-8, Info 1, MON-8, Info 2).
1. Byte
2. Byte
1 0 0 0
MON-8
r | 0 0 0
D7 D6 D5 D4 D3 D2 D1 D0
Local Command (Message/Data)
Register | Addr.
Table 13
Mon-8 Local Function Commands
r
Code
D7-D0 (Bin)
1011 1110
Direction
D
Function
Local Commands
Partial Activation Control External
. With the
PACE-command issued, the U-transceiver will
ignore the actual status of the received UOA-bit
and behave as if the UOA-bit was set to (1).
After issuing PACE the UOA/SAI-bits can be
controlled by MON-2-commands.
Partial Activation Control Automatic
. PACA
enables the device to interpret the UOA-bit and
control the SAI-bit automatically. Partial
activation and deactivation is therefore possible.
The U-transceiver is automatically reset into this
mode in the states “Test”, “Receive Reset” and
“Tear Down”.
U
PACE
0
0
1011 1111
PACA
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