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参数资料
| 型号： | DS21448L+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/60页 |
| 文件大小： | 0K |
| 描述： | IC LIU QUAD E1/T1/J1 128-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 72 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 4/4 |
| 规程： | T1/E1/J1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-LQFP |
| 供应商设备封装： | 128-LQFP（14x20） |
| 包装： | 管件 |
| 产品目录页面： | 1430 (CN2011-ZH PDF) |
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DS21448 3.3V T1/E1/J1 Quad Line Interface
14 of 60
4. PORT OPERATION
4.1 Hardware Mode
The DS21448 supports a hardware configuration mode that allows the user to configure the device by setting levels
on the device’s pins. This mode allows the DS21448 configuration without the use of a microprocessor, simplifying
designs. Not all of the device features are supported in the hardware mode.
In hardware mode (BIS0 = 1, BIS1 = 1) several pins have been redefined so they can be used for initializing the
DS21448. Refer to Table 2-B and Table 2-E for pin assignment and definition. Because of limited pin count, several
functions have been combined and affect all four channels in the device and/or treat the receive and transmit paths
as one block. Restrictions when using the hardware mode include the following:
BPCLK pins only output a 16.384MHz signal.
The RCL/LOTC pins are designated to RCL.
The RHBE and THBE control bits are combined and controlled by HBE.
RSCLKE and TSCLKE bits are combined and controlled by SCLKE.
TCES and RCES are combined and controlled by CES.
The transmitter functions are combined and controlled by TX1 and TX0.
Loopback functions are controlled by LOOP1 and LOOP0.
JABDS defaults to 128-bit buffer depth.
All other control bits default to logic 0.
Table 4-A. Loopback Control in Hardware Mode
LOOPBACK
SYMBOL
LOOP1
LOOP0
Remote Loopback
RLB
1
Local Loopback
LLB
1
0
Analog Loopback
ALB
0
1
No Loopback
—
0
Table 4-B. Transmit Data Control in Hardware Mode
TRANSMIT DATA
SYMBOL
TX1
TX0
Unframed All Ones
TUA1
1
Alternating Ones and Zeros
TAOZ
1
0
PRBS
TPRBSE
0
1
TPOS and TNEG
—
0
Table 4-C. Receive Sensitivity Settings in Hardware Mode
EGL
ETS
RECEIVE SENSITIVITY (dB)
0
0 (E1)
-12 (short haul)
1
0 (E1)
-43 (long haul)
1
1 (T1)
-30 (limited long haul)
0
1 (T1)
-36 (long haul)
Table 4-D. Monitor Gain Settings in Hardware Mode
MM1
MM0
INTERNAL LINEAR GAIN BOOST (dB)
0
Normal operation (no boost)
0
1
20
1
0
26
1
32
Table 4-E. Internal Rx Termination Select in Hardware Mode
RT1
RT0
INTERNAL RECEIVE
TERMINATION CONFIGURATION
0
Internal receive-side termination disabled
0
1
Internal receive-side 120 enabled
1
0
Internal receive-side 100 enabled
1
Internal receive-side 75 enabled
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21448L+ | 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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 |
| DS21448L+W | 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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 |
| DS21448LDK | 功能描述:KIT DESIGN LIU DS21448L T1/J1/E1 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| DS21448LN | 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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 |
| DS21448LN+ | 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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 |
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