参数资料
| 型号： | DS2154LNA2+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 71/124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 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | E1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 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 |
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DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
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7. ERROR COUNT REGISTERS
The DS21354/DS21554 have a set of four counters that record bipolar or code violations, errors in the
CRC4 SMF codewords, E bits as reported by the far end, and word errors in the FAS. Each of these four
counters is automatically updated on either one-second boundaries (CCR2.7 = 0) or every 62.5ms
(CCR2.7 = 1) as determined by the timer in Status Register 2 (SR2.4). Hence, these registers contain
performance data from either the previous second or the previous 62.5ms. The user can use the interrupt
from the one-second timer to determine when to read these registers. The user has a full second (or
62.5ms) to read the counters before the data is lost. All four counters will saturate at their respective
maximum counts and they will not rollover.
7.1.
BPV or Code Violation Counter
Violation Count Register 1 (VCR1) is the most significant word and VCR2 is the least significant word of
a 16-bit counter that records either BiPolar Violations (BPVs) or Code Violations (CVs). If CCR2.6 = 0,
then the VCR counts bipolar violations. Bipolar violations are defined as consecutive marks of the same
polarity. In this mode, if the HDB3 mode is set for the receive side via CCR1.2, then HDB3 codewords
are not counted as BPVs. If CCR2.6 = 1, then the VCR counts code violations as defined in ITU O.161.
Code violations are defined as consecutive bipolar violations of the same polarity.
In most applications, the framer should be programmed to count BPVs when receiving AMI code and to
count CVs when receiving HDB3 code. This counter increments at all times and is not disabled by loss of
sync conditions. The counter saturates at 65,535 and will not rollover. The bit error rate on an E1 line
would have to be greater than 10** - 2 before the VCR would saturate.
VCR1: UPPER BIPOLAR VIOLATION COUNT REGISTER 1 (Address = 00 Hex)
VCR2: LOWER BIPOLAR VIOLATION COUNT REGISTER 2 (Address = 01 Hex)
(MSB)
(LSB)
V15
V14
V13
V12
V11
V10
V9
V8
VCR1
V7
V6
V5
V4
V3
V2
V1
V0
VCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
V15
VCR1.7
MSB of the 16-bit code violation count.
V0
VCR2.0
LSB of the 16-bit code violation count.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2154L | IC TXRX E1 1CHIP 5V ENH 100-LQFP |
| DS2155LN | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2156LN+ | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2172T/T&R | IC TESTER BIT ERROR RATE 32-TQFP |
| DS2174QN+ | IC BERT ENHANCED 44-PLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2154LNA2+ | 功能描述:网络控制器与处理器 IC Enhanced 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 |
| DS2154LND2 | 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 |
| DS2154LND2+ | 制造商:Maxim Integrated Products 功能描述:ENHANCED E1 SCT LQFP REVD2 IND LF - Rail/Tube |
| DS2155 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface |
| DS2155_06 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:T1/E1/J1 Single-Chip Transceiver |
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