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參數(shù)資料
| 型號(hào)： | DS2151Q |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | T1 Single-Chip Transceiver(T1單片收發(fā)器) |
| 中文描述： | DATACOM, FRAMER, PQCC44 |
| 封裝： | 0.652 INCH, PLASTIC, LCC-44 |
| 文件頁數(shù)： | 19/46頁 |
| 文件大?。?/td> | 307K |
| 代理商： | DS2151Q |
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DS2151Q
022698 19/46
5.0 ERROR COUNT REGISTERS
There are a set of three counters in the DS2151Q that
record bipolar violations, excessive zeros, errors in the
CRC6 code words, framing bit errors, and number of
multiframes that the device is out of receive synchro-
nization. Each of these three counters are automatically
updated on one second boundaries as determined by
the one second timer in Status Register 2 (SR2.5).
Hence, these registers contain performance data from
the previous second. The user can use the interrupt
from the one second timer to determine when to read
these registers. The user has a full second to read the
counters before the data is lost. All three counters will
saturate at their respective maximum counts and they
will not rollover (note: only the Line Code Violation
Count Register has the potential to overflow).
5.1 Line Code Violation Count Register
(LCVCR)
Line Code Violation Count Register 1 (LCVCR1) is the
most significant word and LCVCR2 is the least signifi-
cant word of a 16–bit counter that records code viola-
tions (CVs). CVs are defined as Bipolar Violations
(BPVs) or excessive zeros. See Table 5–1 for details of
exactly what the LCVCRs count. If the B8ZS mode is
set for the receive side via CCR2.2, then B8ZS code
words are not counted. This counter is always enabled;
it is not disabled during receive loss of synchronization
(RLOS=1) conditions.
LCVCR1: LINE CODE VIOLATION COUNT REGISTER 1
(Address=23 Hex)
LCVCR2: LINE CODE VIOLATION COUNT REGISTER 2
(Address=24 Hex)
(MSB)
(LSB)
LCV15
LCV14
LCV13
LCV12
LCV11
LCV10
LCV9
LCV8
LCV7
LCV6
LCV5
LCV4
LCV3
LCV2
LCV1
LCV0
SYMBOL
POSITION
NAME AND DESCRIPTION
LCV15
LCVCR1.7
MSB of the 16–Bit code violation count
LCV0
LCVCR2.0
LSB of the 16–Bit code violation count
LINE CODE VIOLATION COUNTING ARRANGEMENTS
Table 5–1
COUNT EXCESSIVE
ZEROS
(RCR1.7)
B8ZS ENABLED
(CCR2.2)
WHAT IS COUNTED IN THE LCVCRs
no
no
BPVs
yes
no
BPVs + 16 consecutive zeros
no
yes
BPVs (B8ZS code words not counted)
yes
yes
BPVs + 8 consecutive zeros
5.2 Path Code Violation Count Register
(PCVCR)
When the receive side of the DS2151Q is set to operate
in the ESF framing mode (CCR2.3=1), PCVCR will
automatically be set as a 12–bit counter that will record
errors in the CRC6 code words. When set to operate in
the D4 framing mode (CCR2.3=0), PCVCR will auto-
matically count errors in the Ft framing bit position. Via
the RCR2.1 bit, the DS2151Q can be programmed to
also report errors in the Fs framing bit position. The
PCVCR will be disabled during receive loss of synchro-
nization (RLOS=1) conditions. See Table 5–2 for a
detailed description of exactly what errors the PCVCR
counts.
LCVCR1
LCVCR2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2151Q/T&R | 制造商:Maxim Integrated Products 功能描述:IC TXRX T1 1-CHIP 5V LP 44-PLCC |
| DS2151Q/T&R | 功能描述:IC TXRX T1 1-CHIP 5V LP 44-PLCC RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
| DS2151QB | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 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 |
| DS2151QB/T&R | 制造商:Maxim Integrated Products 功能描述:T1 SINGLE CHIP XCVR REV B T&R - Tape and Reel |
| DS2151QB/T&R+ | 制造商:Maxim Integrated Products 功能描述:FRAMER DS1/E1/ISDN-PRI/T1 5V 44PLCC - Tape and Reel |
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