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参数资料
| 型号： | DS21554LBN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 82/124页 |
| 文件大小： | 0K |
| 描述： | IC TXRX E1 5V 100-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 90 |
| 功能： | 单芯片收发器 |
| 接口： | E1，HDLC，J1，T1 |
| 电路数： | 1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 电流 - 电源： | 75mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-LQFP（14x14） |
| 包装： | 托盘 |
| 包括： | 远程和 AIS 警报检测器 / 发生器 |
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DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
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10.
PER-CHANNEL CODE GENERATION AND LOOPBACK
The DS21354/DS21554 can replace data on a channel-by-channel basis in both the transmit and receive
directions. The transmit direction is from the backplane to the E1 line and is covered in Section 10.1. The
receive direction is from the E1 line to the backplane and is covered in Section 10.2.
10.1.
Transmit-Side Code Generation
In the transmit direction there are two methods by which channel data from the backplane can be
overwritten with data generated by the framer. The first method covered in Section 10.1.1 was a feature
contained in the original DS2153, while the second method covered in 10.1.2 is a new feature of the
DS2154/DS21354/DS21554.
10.1.1.
Simple Idle Code Insertion and Per-Channel Loopback
The first method involves using the Transmit Idle Registers (TIR1/2/3/4) to determine which of the 32 E1
channels should be overwritten with the code placed in the Transmit Idle Definition Register (TIDR).
This method allows the same 8-bit code to be placed into any of the 32 E1 channels. If this method is
used, then the CCR3.5 control bit must be set to zero.
Each of the bit position in the Transmit Idle Registers (TIR1/TIR2/TIR3/TIR4) represent a DS0 channel
in the outgoing frame. When these bits are set to a one, the corresponding channel will transmit the Idle
Code contained in the Transmit Idle Definition Register (TIDR).
The Transmit Idle Registers (TIRs) have an alternate function that allow them to define a Per-Channel
Loopback (PCLB). If the TIRFS control bit (CCR3.5) is set to one, then the TIRs determine which
channels (if any) from the backplane should be replaced with the data from the receive side or in other
words, off of the E1 line. If this mode is enabled, then transmit and receive clocks and frame syncs must
be synchronized.
One method to accomplish this would be to tie RCLK to TCLK and RFSYNC to TSYNC. There are no
restrictions on which channels can be looped back or on how many channels can be looped back.
TIR1/TIR2/TIR3: TRANSMIT IDLE REGISTERS (Address = 26 to 29 Hex)
[Also used for Per-Channel Loopback]
(MSB)
(LSB)
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
TIR1 (26)
CH16
CH15
CH14
CH13
CH12
CH11
CH10
CH9
TIR2 (27)
CH24
CH23
CH22
CH21
CH20
CH19
CH18
CH17
TIR3 (28)
CH32
CH31
CH30
CH29
CH28
CH27
CH26
CH25
TIR4 (29)
SYMBOL
POSITION
NAME AND DESCRIPTION
CH1 to
CH32
TIR1.0 to
TIR4.7
Transmit Idle Code Insertion Control Bits.
0 = do not insert the Idle Code in the TIDR into this channel
1 = insert the Idle Code in the TIDR into this channel
Note: If CCR3.5 = 1, then a zero in the TIRs implies that channel data is to be sourced from TSER,
and a one implies that channel data is to be sourced from the output of the receive-side framer (i.e.,
Per-Channel Loopback; see Figure 2-1).
相关PDF资料 |
PDF描述 |
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| DS21552LN+ | IC TXRX T1 1-CHIP 5V 100-LQFP |
| DS2174Q+T&R | IC BERT ENHANCED 44-PLCC |
| DS2155G+T&R | IC TXRX T1/E1/J1 1 CHIP 100CSBGA |
| DS2155G+ | IC TXRX T1/E1/J1 1-CHIP 100CSBGA |
| DS2155G | IC TXRX T1/E1/J1 1-CHIP 100CSBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21554LBN+ | 功能描述:网络控制器与处理器 IC 3.3/5V 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 |
| DS21554LN | 功能描述:网络控制器与处理器 IC 3.3/5V 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 |
| DS21554LN+ | 功能描述:网络控制器与处理器 IC 3.3/5V 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 |
| DS2155DK | 功能描述:网络开发工具 RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V |
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