參數(shù)資料
型號(hào)： DS21354LN
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PQFP100
封裝： 14 X 14 MM, LQFP-100
文件頁數(shù)： 73/126頁
文件大?。?/td> 1082K
代理商： DS21354LN
DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
50 of 124
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.
相關(guān)PDF資料
PDF描述
DS21372TN SPECIALTY TELECOM CIRCUIT, PQFP32
DS21372T SPECIALTY TELECOM CIRCUIT, PQFP32
DS21372 SPECIALTY TELECOM CIRCUIT, PQFP32
DS2141AN DATACOM, FRAMER, PDIP40
DS2141AQN DATACOM, FRAMER, PQCC44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21354LN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 Single Chip Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21372 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3.3V Bit Error Rate Tester BERT
DS21372T 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V Bit Error Rate Tester (BERT) RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21372T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V Bit Error Rate Tester (BERT) RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21372TN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V Bit Error Rate Tester (BERT) RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*