參數(shù)資料
型號(hào)： DS21FT40
元件分類： 通信及網(wǎng)絡(luò)
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)： 26/87頁
文件大?。?/td> 386K
代理商： DS21FT40
DS21FT40
26 of 87
SYMBOLS
POSITION
NAME AND DESCRIPTION
FRC
RCR1.2
Frame Resync Criteria.
0 = resync if FAS received in error 3 consecutive times
1 = resync if FAS or bit 2 of non–FAS is received in error 3
consecutive times
Sync Enable.
0 = auto resync enabled
1 = auto resync disabled
Resync. When toggled from low to high, a resync is initiated.
Must be cleared and set again for a subsequent resync.
SYNCE
RCR1.1
RESYNC
RCR1.0
SYNC/RESYNC CRITERIA
Table 5–1
FRAME OR
MULTIFRAME
LEVEL
FAS
FAS present in frame N and
N + 2, and FAS not present
in frame N + 1
SYNC CRITERIA
RESYNC CRITERIA
ITU SPEC.
Three consecutive incorrect
FAS received
Alternate (RCR1.2=1) the
above criteria is met or
three consecutive incorrect
bit 2 of non–FAS received
915 or more CRC4 code
words out of 1000 received
in error
Two consecutive MF
alignment words received
in error
G.706
4.1.1
4.1.2
CRC4
Two valid MF alignment
words found within 8 ms
G.706
4.2 and 4.3.2
CAS
Valid MF alignment word
found and previous timeslot
16 contains code other than
all zeros
G.732 5.2
RCR2: RECEIVE CONTROL REGISTER 2 (Address=11 Hex)
(MSB)
Sa8S
Sa7S
Sa6S
(LSB)
–
Sa5S
Sa4S
RBCS
RESE
SYMBOLS
POSITION
NAME AND DESCRIPTION
Sa8S
Sa7S
Sa6S
Sa5S
Sa4S
RCR2.7
RCR2.6
RCR2.5
RCR2.4
RCR2.3
Sa8 Bit Select. Not applicable for DS21FT40.
Sa7 Bit Select. Not applicable for DS21FT40.
Sa6 Bit Select. Not applicable for DS21FT40.
Sa5 Bit Select. Not applicable for DS21FT40.
Sa4 Bit Select. Not applicable for DS21FT40.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21FT40N 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
DS21FT42 功能描述:網(wǎng)絡(luò)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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT42N 功能描述:網(wǎng)絡(luò)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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44 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
DS21FT44+ 功能描述:網(wǎng)絡(luò)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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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