- 您现在的位置：买卖IC网 > PDF目录378591 > DS21Q58 E1 Quad Transceiver PDF资料下载
参数资料
| 型号： | DS21Q58 |
| 英文描述： | E1 Quad Transceiver |
| 中文描述： | E1四收发器 |
| 文件页数： | 42/74页 |
| 文件大小： | 647K |
| 代理商： | DS21Q58 |
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页当前第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
DS21Q58 E1 Quad Transceiver
42 of 74
17.
The DS21Q58 has per-channel loopback capability that can operate in one of two modes: remote per-channel
loopback or local per-channel loopback. PCLB1/2/3/4 are used for both modes to determine which channels are
looped back. In remote per-channel loopback mode, PCLB1/2/3/4 determine which channels (if any) in the transmit
direction should be replaced with the data from the receiver or, in other words, off the E1 line. In local per-channel
loopback mode, PCLB1/2/3/4 determine which channels (if any) in the receive direction should be replaced with the
data from the transmit. If either mode is enabled, transmit and receive clocks and frame syncs must be
synchronized. There are no restrictions on which channels can be looped back or on how many channels can be
looped back.
Register Name:
PCLB1, PCLB2, PCLB3, PCLB4
Register Description:
Per-Channel Loopback Registers
Register Address:
2B Hex, 2C Hex, 2D Hex, 2E Hex
Bit #
7
6
5
4
CH8
CH7
CH6
CH5
CH4
CH16
CH15
CH14
CH13
CH12
CH24
CH23
CH22
CH21
CH20
CH32
CH31
CH30
CH29
CH28
NAME
BIT
Per-Channel Loopback Control Bits
0 = do not loopback this channel
1 = loopback this channel
PER-CHANNEL LOOPBACK
3
2
1
0
CH3
CH11
CH19
CH27
CH2
CH10
CH18
CH26
CH1
CH9
CH17
CH25
Name
FUNCTION
CH1 to CH32
PCLB1.0 to 4.7
18.
The DS21Q58 contains a two-frame (512 bits) elastic store for the receive direction. The elastic store absorbs the
differences in frequency and phase between the E1 data stream and an asynchronous (i.e., not frequency locked)
backplane clock that can be 2.048MHz for normal operation or 4.096MHz, 8.192MHz, or 16.384MHz when using
the IBO function. The elastic store contains full controlled slip capability.
If the receive elastic store is enabled (RCR.4 = 1), the user must provide a 2.048MHz clock to the SYSCLK pin. If
the IBO function is enabled, a 4.096MHz, 8.192MHz, or 16.384MHz clock must be provided at the SYSCLK pin.
The user has the option of either providing a frame/multiframe sync at the RSYNC pin (RCR.5 = 1) or having the
RSYNC pin provide a pulse on frame/multiframe boundaries (RCR.5 = 0). If the user wishes to obtain pulses at the
frame boundary, RCR1.6 must be set to 0; if the user wishes to have pulses occur at the multiframe boundary,
RCR1.6 must be set to 1. If the elastic store is enabled, either CAS (RCR.7 = 0) or CRC4 (RCR.7 = 1) multiframe
boundaries are indicated through the RSYNC output. See Section
24
for timing details. If the 512-bit elastic buffer
either fills or empties, a controlled slip occurs. If the buffer empties, a full frame of data (256 bits) is repeated at
RSER, and the SR1.4 and RIR.3 bits are set to 1. If the buffer fills, a full frame of data is deleted, and the SR1.4
and RIR.4 bits are set to 1.
ELASTIC STORE OPERATION
相关PDF资料 |
PDF描述 |
|---|---|
| DS21Q58L | E1 Quad Transceiver |
| DS21Q58LN | E1 Quad Transceiver |
| DS21Q58 | Dallas Semiconductor |
| DS2227-70 | Flexible NV SRAM Stik |
| DS2227-100 | Flexible NV SRAM Stik |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21Q58L | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58L+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q59 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:RELIABILITY REPORT FOR DS21Q59, REV A2 |
发布紧急采购，3分钟左右您将得到回复。