參數(shù)資料
型號： T7121
廠商： Lineage Power
英文描述： HDLC Interface for ISDN (HIFI-64)(應(yīng)用于ISDN的HDLC（高階數(shù)據(jù)鏈路）接口)
中文描述： 為ISDN接口的HDLC（高保真- 64）（應(yīng)用于綜合業(yè)務(wù)數(shù)字網(wǎng)的的HDLC（高階數(shù)據(jù)鏈路）接口）
文件頁數(shù)： 2/68頁
文件大?。?/td> 685K
代理商： T7121
Table of Contents
Contents
Page
2
Lucent Technologies Inc.
Data Sheet
April 1997
T7121 HDLC Interface for ISDN (HIFI-64)
Features ................................................................................................................................................................... 1
Description................................................................................................................................................................ 1
Pin Information ......................................................................................................................................................... 4
Functional Description.............................................................................................................................................. 8
Microprocessor Bus Interface ................................................................................................................................ 8
Addressing .......................................................................................................................................................... 8
Interrupts............................................................................................................................................................. 8
Resets................................................................................................................................................................. 9
FIFO Memory Buffers ............................................................................................................................................ 9
Transmit FIFO..................................................................................................................................................... 9
Receive FIFO.................................................................................................................................................... 10
Block Move........................................................................................................................................................ 10
Serial Link Interface .......................................................................................................................................... 10
Enabling the Transmitter and Receiver............................................................................................................. 10
Time-Slot Feature ............................................................................................................................................. 13
Transmission During Unassigned Time Slots ................................................................................................... 14
Bit Order During Transmission.......................................................................................................................... 14
Bit Masking........................................................................................................................................................ 16
SLD and IOM2 Examples.................................................................................................................................. 19
HDLC Operation .................................................................................................................................................. 19
Zero-Bit Insertion/Deletion (Bit Stuffing/Destuffing) .......................................................................................... 19
Transmitter FIFO............................................................................................................................................... 21
Sending 1-Byte Frames .................................................................................................................................... 21
Transmitter Underrun........................................................................................................................................ 21
Using the Transmitter Status and Fill Level ...................................................................................................... 21
Receiver FIFO................................................................................................................................................... 21
Receiver Overrun.............................................................................................................................................. 23
Operational Note (T7121-EL, T7121-PL, T7121-EL2, and T7121-PL2)............................................................ 23
Transparent Mode................................................................................................................................................ 24
Diagnostic Modes ................................................................................................................................................ 25
Loopbacks......................................................................................................................................................... 25
3-State Mode..................................................................................................................................................... 28
Other ................................................................................................................................................................. 28
Powerdown Mode ................................................................................................................................................ 28
Registers.............................................................................................................................................................. 28
Absolute Maximum Ratings.................................................................................................................................... 45
Electrical Characteristics........................................................................................................................................ 45
Clock Characteristics.............................................................................................................................................. 46
Timing Characteristics............................................................................................................................................ 46
TDM Frame Timing Diagrams.............................................................................................................................. 46
Multiplexed Address and Data............................................................................................................................. 51
Separate Address and Data................................................................................................................................. 53
Concentration Highway........................................................................................................................................ 55
Handling Precautions ............................................................................................................................................. 59
Outline Diagrams.................................................................................................................................................... 60
28-Pin, Plastic DIP............................................................................................................................................... 60
28-Pin, Plastic SOJ, Surface Mounting................................................................................................................ 61
Ordering Information............................................................................................................................................... 62
Appendix................................................................................................................................................................. 63
Transparent Mode................................................................................................................................................ 63
HDLC Mode ......................................................................................................................................................... 63
General Features................................................................................................................................................. 64
Power and Ground............................................................................................................................................... 66
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