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參數資料
型號: W6691
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Transceiver
中文描述: 綜合業務數字網的S / T接口收發器
文件頁數: 28/106頁
文件大小: 428K
代理商: W6691
Preliminary W6691
Publication Release Date: Sep 2001
28 Revision 1.1
Send Single Pulses
A 2 KHz , isolated pulse with alternating polarities is sent.
Layer 1 Reset
A layer 1 reset command forces the transmission of INFO 0 and disables the S line awake detector. Thus
activation from NT is not possible. There is no indication in reset state. The reset state can be left only with
ECK command.
TABLE 7.2 LAYER 1 COMMAND CODES
Command
Symbol Code
Description
Enable clock
ECK
0000
Enable internal clocks
Layer 1 reset
RST
0001
Layer 1 reset
Send continuous pulses
SCP
0100
Send continuous pulses at 96 kHz
Send single pulses
SSP
0010
Send isolated pulses at 2 kHz
Activate request at priority 8
AR8
1000
Activate layer 1 and set D channel priority level to 8
Activate request at priority 10 AR10
1001
Activate layer 1 and set D channel priority to 10
Enable analog loopback
EAL
1010
Enable analog loopback
Deactivate layer 1
DRC
1111
Deactivate layer 1 and disable internal clocks
TABLE 7.3 LAYER 1 INDICATION CODES
Indication
Symbol Code
Descriptions
Clock Enabled
CE
0111
Internal clocks are enabled
Deactivate
downstream
request
DRD
0000
Deactivation request by S interface, i.e INFO 0 received
Level detected
LD
0100
Signal received, receiver not synchronous
Activate request downstream ARD
1000
INFO 2 received
Test indication
TI
1010
Analog loopback activated or continuous zeros or single
zeros transmitted
Awake test indication
ATI
1011
Level detected during test function
Activate indication with priority
class 1
AI8
1100
INFO 4 received, D channel priority is 8 or 9
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