- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371179 > T7121 T7121 HDLC Interface for ISDN PDF資料下載
參數(shù)資料
| 型號： | T7121 |
| 英文描述： | T7121 HDLC Interface for ISDN |
| 中文描述： | T7121的HDLC接口用于ISDN |
| 文件頁數(shù)： | 25/68頁 |
| 文件大?。?/td> | 685K |
| 代理商： | T7121 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
Lucent Technologies Inc.
25
Data Sheet
April 1997
T7121 HDLC Interface for ISDN (HIFI-64)
Functional Description
(continued)
Programming Note:
The match bit (MATCH) affects both the transmitter and the receiver. Care should be taken to
correctly program both the transmit idle character and the receive match character before setting MATCH. If the
transmit idle character is programmed to FF hex, the MATCH bit appears to affect only the receiver.
The operation of the receiver in transparent mode is summarized in Table 5.
Diagnostic Modes
Loopbacks
The serial link interface can operate in two diagnostic loopback modes: (1) local loopback and (2) remote loopback.
The local loopback mode is selected when the LLOOP bit is set to 1 in the operation control register (R6—B1). The
remote loopback is selected when the RLOOP bit is set to 1 in the operation control register (R6—B0). For normal
traffic, i.e., to operate the transmitter and receiver independently, the LLOOP bit and the RLOOP bit should both be
cleared to 0. Loopbacks are available in both TDM highway and non-TDM highway modes. Do not simultaneously
attempt local and remote loopbacks.
Either DRA or DRB can be used for receive data, based on the value of the DRA/B bit in register 8 (R8—B7). DXA
or DXB or both can be selected for transmit data, depending on the values programmed for the DXAC and DXBC
bits in register 7 (R7—B6 and R7—B7).
Table 5. Receiver Operation in Transparent Mode
HWYEN
(R0—B7)
0
ALOCT
(AR11—B4)
X
MATCH
(AR11—B5)
0
Receiver Operation
Serial-to-parallel conversion begins with first CLKR after
ENR is set. Data loaded to receive FIFO immediately.
Match user-defined character (AR12) using sliding window.
Byte aligns once character is recognized. No data to
receive FIFO until match is detected.
Match user-defined character (AR12), but only on octet
boundary. Boundary based on first CLKR after ENR set. No
data to receive FIFO until match is detected.
Byte aligns to time slot. No match necessary. Data loaded
to receive FIFO immediately.
Match user-defined character (AR12) using sliding window.
Byte aligns once character is recognized. No data to
receive FIFO until match is detected.
Match user-defined character (AR12) to byte received in
time slot. No data to receive FIFO until match is detected.
0
0
1
0
1
1
1
X
0
1
0
1
1
1
1
相關PDF資料 |
PDF描述 |
|---|---|
| T7121-EL2 | T7121 HDLC Interface for ISDN |
| T7121-PL2 | T7121 HDLC Interface for ISDN |
| T7121 | HDLC Interface for ISDN (HIFI-64)(應用于ISDN的HDLC（高階數(shù)據(jù)鏈路）接口) |
| T7502 | T7502 Dual PCM Codec with Filters |
| T7503 | T7503 Dual PCM Codec with Filters |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| T7-121A1 | 制造商:OTTO 功能描述:Toggle Switches ON NONE OFF 1 Pole Standard Bat Handle 制造商:OTTO Engineering Inc 功能描述:Switch Toggle ON None OFF SPST Bat Toggle Screw 16A 115VAC 28VDC Panel Mount with Threads |
| T7-121A2D | 制造商:OTTO 功能描述:Toggle Switches ON NONE OFF 1 Pole Standard LeverLock 制造商:OTTO Engineering Inc 功能描述:1 POLE, SCREW, STD, |
| T7-121A2G | 功能描述:撥動開關 ON NONE OFF 1 Pole Standard LeverLock RoHS:否 制造商:OTTO 觸點形式: 開關功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風格: 端子密封: 觸點電鍍: 照明: |
| T7-121A5 | 制造商:OTTO 功能描述:Toggle Switches ON NONE OFF 1 Pole Standard Bat Handle 制造商:OTTO Engineering Inc 功能描述:Switch Toggle ON None OFF SPST Bat Toggle Screw 16A 115VAC 28VDC Panel Mount with Threads |
| T7-121B1 | 功能描述:撥動開關 ON NONE ON 1 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點形式: 開關功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風格: 端子密封: 觸點電鍍: 照明: |
發(fā)布緊急采購，3分鐘左右您將得到回復。