- 您现在的位置：买卖IC网 > PDF目录378591 > DS26503 (Maxim Integrated Products, Inc.) T1/E1/J1/64KCC BITS Element PDF资料下载
参数资料
| 型号： | DS26503 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | T1/E1/J1/64KCC BITS Element |
| 中文描述： | T1/E1/J1 BITS单元 |
| 文件页数： | 64/123页 |
| 文件大小： | 995K |
| 代理商： | DS26503 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页当前第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页
DS26503 T1/E1/J1 BITS Element
64 of 123
12. E1 SYNCHRONIZATION STATUS MESSAGE
The DS26503 provides access to both the transmit and receive Sa/Si bits. In E1, the Sa bits are used to
transmit and receive the SSM. The primary method to access the Sa (and Si) bits is based on CRC4
multiframe access. An alternate method is based on double-frame access.
Table 12-1. E1 SSM Messages
QUALITY
LEVEL
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DESCRIPTION
Sa BIT
MESSAGE
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
01111
Quality unknown (existing sync network)
Reserved
Rec. G.811 (Traceable to PRS)
Reserved
SSU-A (Traceable to SSU type A, see G.812)
Reserved
Reserved
Reserved
SSU-B (Traceable to SSU type B, see G.812)
Reserved
Reserved
Synchronous Equipment Timing Source
Reserved
Reserved
Reserved
Do not use for synchronization
In E1 operation, SSMs are transmitted using one of the Sa bits—Sa4, Sa5, Sa6, Sa7, or Sa8. The SSM is
transmitted MSB first in the first frame of the multiframe. Each multiframe will contain two SSMs, one in
each sub-multiframe. An SSM is declared valid when the message in three sub-multiframes are alike.
12.1 Sa/Si Bit Access Based on CRC4 Multiframe
On the receive side, there is a set of eight registers (RSiAF, RSiNAF, RRA, RSa4 to RSa8) that report the
Si and Sa bits as they are received. These registers are updated on CRC4 multiframes. A bit in status
register 4 (SR4.1) indicates the multiframe boundary. The host can use the SR4.1 bit to know when to
read these registers. The user has 2ms to retrieve the data before it is lost. The MSB of each register is the
first received. See the following register descriptions for more details.
On the transmit side, there is also a set of eight registers (TSiAF, TSiNAF, TRA, TSa4 to TSa8) that, via
the transmit Sa bit control register (TSaCR), can be programmed to insert both Si and Sa data. Data is
sampled from these registers with the setting of the transmit multiframe bit in status register 2 (SR4.4).
The host can use the SR4.4 bit to know when to update these registers. It has 2ms to update the data or
else the old data will be retransmitted. The MSB of each register is the first bit transmitted. See the
following register descriptions for details.
相关PDF资料 |
PDF描述 |
|---|---|
| DS26LV3 | 16 AMP LOW PROFILE POWER RELAY |
| DS2703 | SHA-1 Battery Pack Authentication IC |
| DS2703U | SHA-1 Battery Pack Authentication IC |
| DS2703UR | SHA-1 Battery Pack Authentication IC |
| DS2703UT | SHA-1 Battery Pack Authentication IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS26503_07 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:T1/E1/J1 BITS Element |
| DS26503DK | 功能描述:时钟和定时器开发工具 DS26503 Dev Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V |
| DS26503L | 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| DS26503L+ | 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| DS26503LN | 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。