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参数资料
型号： DS21FF44N
厂商： DALLAS SEMICONDUCTOR
元件分类： Digital Transmission Controller
英文描述： DATACOM, FRAMER, PBGA300
封装： 27 X 27 MM, BGA-300
文件页数： 51/110页
文件大小： 526K
代理商： DS21FF44N
DS21FT44/DS21FF44
45 of 110
ALARM CRITERIA Table 11-1
ALARM
SET CRITERIA
CLEAR CRITERIA
ITU
SPEC.
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 three or more
zeros
G.732
4.2
RSA0 (receive signaling
all zeros)
over 16 consecutive frames
(one full MF) timeslot 16
contains all zeros
over 16 consecutive frames
(one full MF) timeslot 16
contains at least a single
one
G.732
5.2
RDMA (receive distant
multiframe alarm)
bit 6 in timeslot 16 of
frame 0 set to one for two
consecutive MF
bit 6 in timeslot 16 of
frame 0 set to zero for two
consecutive MF
O.162
2.1.5
RUA1 (receive
unframed all ones)
less than three zeros in two
frames (512 bits)
more than two zeros in two
frames (512 bits)
O.162
1.6.1.2
RRA (receive remote
alarm)
bit 3 of non–align frame set
to one for three consecutive
occasions
bit 3 of non–align frame set
to zero for three
consecutive occasions
O.162
2.1.4
RCL (receive carrier
loss)
255 (or 2048) consecutive
zeros received
in 255 bit times, at least 32
ones are received
G.775 / G.962
SR2: STATUS REGISTER 2 (Address=07 Hex)
(MSB)
(LSB)
RMF
RAF
TMF
SEC
TAF
LOTC
RCMF
TSLIP
SYMBOL
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.
RAF
SR2.6
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.
TMF
SR2.5
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.
SEC
SR2.4
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.
TAF
SR2.3
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.
LOTC
SR2.2
Loss of Transmit Clock. Set when the TCLK pin has not
transitioned for one channel time (or 3.9
s). Will force the
LOTC pin high if enabled via TCR2.0.
相关PDF资料
PDF描述
DS21FT40N DATACOM, FRAMER, PBGA300
DS21FT40 DATACOM, FRAMER, PBGA300
DS21FT42 DATACOM, FRAMER, PBGA300
DS21FT42N DATACOM, FRAMER, PBGA300
DS21FF42 DATACOM, FRAMER, PBGA300
相关代理商/技术参数
参数描述
DS21FT40 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Four x Three 12 Channel E1 Framer
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:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FT42N 功能描述:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FT44 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
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