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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： | 40/106頁 |
| 文件大?。?/td> | 428K |
| 代理商： | W6691 |
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Preliminary W6691
Publication Release Date: Sep 2001
40 Revision 1.1
7.2.8Test Functions
The W6691 provides loop and test functions as follows:
- Digital loop via DLP bit in D_MODE register: In the layer 2 block, the transmitted 2B+D data are
internally looped (from HDLC transmitter to HDLC receiver), and in the PCM ports, the
transmitted B channels are internally looped (from PCM inputs to PCM outputs). The clock
timings are generated internally and are independent of the S bus timing. This loop function is
used for test of PCM and higher layer functions, excluding layer 1. After hardware reset, W6691
will power down if S bus is not connected or if there is no signal on the S bus. In this case, the
C/I command ECK must be issued to power up the chip.
- Analog loop via the C/I command EAL: The analog S interface transmitter is internally
connected to the S interface receiver. When the receiver has synchronized itself to the internal
INFO 3 signal, the message "Test Indication" or "Awake Test Indication" is delivered to the CIR
register. No signal is transmitted over the S interface.
In this mode, the S interface awake detector is enabled. Therefore if a level (INFO 2/ INFO 4) is
detected on the S interface, this will be reported by the "Awake Test Indication (ATI)" indication.
- Remote loopback via RLP bit in D_MODE register: The digital 2B data received from the S
interface receiver is loopbacked to the S interface transmitter. The D channel is not looped.
When RLP is enabled, layer 1 D channel is connected to HDLC port and DLP cannot be
enabled.
- Transmission of special test signals via layer 1 command:
* Send Single Pulses (SSP): To send isolated single pulses of alternating polarity, with pulse
width of one bit time, 250 us apart, with a repetition frequency of 2 kHz.
* Send Continuous Pulses (SCP): To send continuous pulses of alternating polarity, with pulse
width of bit time. The repetition frequency is 96 kHz.
相關PDF資料 |
PDF描述 |
|---|---|
| W6691CD | ISDN S/T Interface Transceiver |
| W6691CP | ISDN S/T Interface Transceiver |
| W6692 | PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器) |
| W6693A | USB Bus ISDN S/T Interface Controller(USB總線的ISDN S/T接口控制器) |
| W6694 | PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W66910 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| W66910CD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:TE Mode ISDN S/T-Controller with Microprocessor Interface |
| W6691CD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:ISDN S/T Interface Transceiver |
| W6691CP | 制造商:WINBOND 制造商全稱:Winbond 功能描述:ISDN S/T Interface Transceiver |
| W6692 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCI Bus ISDN S/T-Controller |
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