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BT8375EPF 参数 Datasheet PDF下载

BT8375EPF图片预览
型号: BT8375EPF
PDF下载: 下载PDF文件 查看货源
内容描述: 单芯片收发器T1 / E1和综合业务数字网( ISDN )基本速率接口 [single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces]
分类和应用: 电信集成电路综合业务数字网
文件页数/大小: 323 页 / 1950 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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Bt8370/8375/8376  
Fully Integrated T1/E1 Framer and Line Interface  
3.15 Bit-Oriented Protocol Registers  
TBOP_MODE[1:0] Transmit BOP modeEnables the BOP transmitter and establishes priority of TBOP [addr  
0A1] output in relation to TDL1 [addr 0AD] output. When TBOP messages are given output  
priority, any write to TBOP aborts TDL1 output within the next 8 FDL bit times and suspends  
TDL1 data output until TBOP has completed transmission. The processor can check TMSG1  
status [addr 0AE] before writing TBOP to determine if TDL1 output is idle. The TDL1 buffer  
can be written while TBOP is granted priority.  
When TDL1 messages are given output priority, TBOP output is suspended when the TDL1  
buffer becomes non-empty. In case of multiple pending messages, PRM messages have highest  
priority, then BOP, and then TDL1. Furthermore, TBOP is forced to wait until the TDL1 buffer  
is empty and the TDL1 output is in the idle state before TBOP output is granted priority. If  
TBOP_LEN is continuous, and TDL1/PRM message output is pending, then TBOP is  
suspended at the next 16-bit pattern boundary. TDL1 priority is used to transmit PRM, DS1  
Idle (ISID), or optional path maintenance (PID, TSID) messages, which are separated by ESF  
Yellow Alarm codewords, as defined in Annex D of ANSI T1.403.  
TBOP_MODE  
Mode Description  
Disabled: TBOP writes are ignored  
TBOP output priority  
0X  
10  
11  
TDL1 output priority  
0A1Transmit BOP Codeword (TBOP)  
Writing a codeword into TBOP transmits a BOP message. The LSB is transmitted first.  
7
6
5
4
3
2
1
0
TBOP[5]  
TBOP[4]  
TBOP[3]  
TBOP[2]  
TBOP[1]  
TBOP[0]  
TBOP[5]  
Sixth bit transmitted  
Fifth bit transmitted  
Fourth bit transmitted  
Third bit transmitted  
Second bit transmitted  
TBOP[4]  
TBOP[3]  
TBOP[2]  
TBOP[1]  
TBOP[0]  
Transmit BOP codeword; first bit transmitted  
N8370DSE  
Conexant  
3-89