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(yè)數(shù)： 37/87頁(yè)
文件大?。?/td> 386K
代理商： DS21FT40
DS21FT40
37 of 87
ALARM CRITERIA
Table 6-1
ALARM
SET CRITERIA
CLEAR CRITERIA
ITU
SPEC.
G.732
4.2
RSA1 (receive
signaling all ones)
over 16 consecutive frames
(one full MF) timeslot 16
contains less than three zeros
over 16 consecutive frames
(one full MF) timeslot 16
contains all zeros
bit 6 in timeslot 16 of frame 0
set to one for two consecutive
MF
less than three zeros in two
frames (512 bits)
bit 3 of non–align frame set
to one for three consecutive
occasions
255 (or 2048) consecutive
zeros received
over 16 consecutive frames
(one full MF) timeslot 16
contains three or more zeros
over 16 consecutive frames
(one full MF) timeslot 16
contains at least a single one
bit 6 in timeslot 16 of frame 0
set to zero for two
consecutive MF
more than two zeros in two
frames (512 bits)
bit 3 of non–align frame set
to zero for three consecutive
occasions
in 255 bit times, at least 32
ones are received
RSA0 (receive
signaling all zeros)
G.732
5.2
RDMA (receive
distant multiframe
alarm)
RUA1 (receive
unframed all ones)
RRA (receive remote
alarm)
O.162
2.1.5
O.162
1.6.1.2
O.162
2.1.4
RCL (receive carrier
loss)
G.775 / G.962
SR2: STATUS REGISTER 2 (Address=07 Hex)
(MSB)
RMF
RAF
TMF
(LSB)
TSLIP
SEC
TAF
LOTC
RCMF
SYMBOLS
POSITION
NAME AND DESCRIPTION
RMF
SR2.7
Receive CAS Multiframe. Set every 2 ms (regardless if CAS
signaling is enabled or not) on receive multiframe boundaries.
Used to alert the host that signaling data is available.
Receive Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that Si and Sa bits are
available in the RAF and RNAF registers.
Transmit Multiframe. Set every 2 ms (regardless if CRC4 is
enabled) on transmit multiframe boundaries. Used to alert the
host that signaling data needs to be updated.
One Second Timer. Set on increments of one second based on
RCLK. If CCR2.7=1, then this bit will be set every 62.5 ms
instead of once a second.
Transmit Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that the TAF and TNAF
registers need to be updated.
RAF
SR2.6
TMF
SR2.5
SEC
SR2.4
TAF
SR2.3
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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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