參數(shù)資料
型號： DS21FT42
元件分類： 通信及網(wǎng)絡
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 55/145頁
文件大?。?/td> 466K
代理商： DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/1235
no
yes
BPVs (B8ZS code words not
counted)
BPV’s + 8 consecutive zeros
yes
yes
Path Code Violation Count Register
(PCVCR) When the receive side of a framer 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 automatically count errors in the Ft framing bit position. Via
the RCR2.1 bit, a framer can be programmed to also report errors in the Fs framing bit position. The PCVCR will
be disabled during receive loss of synchronization (RLOS=1) conditions. See Table 12-2 for a detailed
description of exactly what errors the PCVCR counts.
PCVCR1: PATH VIOLATION COUNT REGISTER 1
(Address = 25 Hex)
PCVCR2: PATH VIOLATION COUNT REGISTER 2
(Address = 26 Hex)
(MSB)
(note 1)
(LSB)
CRC/
FB8
CRC/
FB0
(note 1)
(note 1)
(note 1)
CRC/
FB11
CRC/
FB3
CRC/
FB10
CRC/
FB2
CRC/
FB9
CRC/
FB1
PCVCR1
CRC/
FB7
CRC/
FB6
CRC/
FB5
CRC/
FB4
PCVCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
CRC/FB11
PCVCR1.3
MSB of the 12–Bit CRC6 Error or Frame Bit Error Count
(note
#2)
LSB of the 12–Bit CRC6 Error or Frame Bit Error Count
(note
#2)
CRC/FB0
PCVCR2.0
NOTES:
1. The upper nibble of the counter at address 25 is used by the Multiframes Out of Sync Count Register
2. PCVCR counts either errors in CRC code words (in the ESF framing mode; CCR2.3=1) or errors in the
framing bit position (in the D4 framing mode; CCR2.3=0).
PATH CODE VIOLATION COUNTING ARRANGEMENTS
Table 12-2
FRAMING MODE
(CCR2.3)
D4
D4
ESF
COUNT Fs ERRORS
(RCR2.1)
no
yes
don’t care
WHAT IS COUNTED
IN THE PCVCRs
errors in the Ft pattern
errors in both the Ft & Fs patterns
errors in the CRC6 code words
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相關代理商/技術參數(shù)
參數(shù)描述
DS21FT42N 功能描述:網(wǎng)絡控制器與處理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44+ 功能描述:網(wǎng)絡控制器與處理器 IC 4X3 E1 Framer E1 Framer E1 Framer 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N 功能描述:網(wǎng)絡控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N+ 功能描述:網(wǎng)絡控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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