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参数资料
型号： DS21FT44N+
厂商： Maxim Integrated Products
文件页数： 66/117页
文件大小： 0K
描述： IC FRAMER 4X4 16CH 300-BGA
产品培训模块： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装： 40
控制器类型： E1 调帧器
接口： 并行/串行
电源电压： 2.97 V ~ 3.63 V
电流 - 电源： 225mA
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 300-BBGA
供应商设备封装： 300-PBGA（27x27）
包装： 管件
DS21FT44/DS21FF44
52 of 117
E-Bit Counter
E-bit Count Register 1 (EBCR1) is the most significant word and EBCR2 is the least significant word of
a 10-bit counter that records Far End Block Errors (FEBE) as reported in the first bit of frames 13 and 15
on E1 lines running with CRC4 multiframe. These count registers will increment once each time the
received E-bit is set to zero. Since the maximum E-bit count in a one second period is 1000, this counter
cannot saturate. The counter is disabled during loss of sync at either the FAS or CRC4 level; it continues
to count if loss of multiframe sync occurs at the CAS level.
EBCR1: E-BIT COUNT REGISTER 1 (Address = 04 Hex)
EBCR2: E-BIT COUNT REGISTER 2 (Address = 05 Hex)
(MSB)
(LSB)
****
**
EB9
EB8
EBCR1
EB7
EB6
EB5
EB4
EB3
EB2
EB1
EB0
EBCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
EB9
EBCR1.1
MSB of the 10-Bit E-Bit Error Count
EB0
EBCR2.0
LSB of the 10-Bit E-Bit Error Count
*The upper 6 bits of EBCR1 at address 04 are the least significant bits of the 12-bit FAS error counter.
FAS Error Counter
FAS Count Register 1 (FASCR1) is the most significant word and FASCR2 is the least significant word
of a 12-bit counter that records word errors in the Frame Alignment Signal in timeslot 0. This counter is
disabled when RLOS is high. FAS errors are not counted when the framer is searching for FAS alignment
and/or synchronization at either the CAS or CRC4 multiframe level. Since the maximum FAS word error
count in a one-second period is 4000, this counter cannot saturate.
FASCR1: FAS ERROR COUNT REGISTER 1 (Address = 02 Hex)
FASCR2: FAS ERROR COUNT REGISTER 2 (Address = 04 Hex)
(MSB)
(LSB)
FAS11
FAS10
FAS9
FAS8
FAS7
FAS6
(Note 2)
FASCR1
FAS5
FAS4
FAS3
FAS2
FAS1
FAS0
(Note 1)
FASCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
FAS11
FASCR1.7
MSB of the 12-Bit FAS Error Count
FAS0
FASCR2.2
LSB of the 12-Bit FAS Error Count
NOTES:
1) The lower 2 bits of FASCR1 at address 02 are the most significant bits of the 10-bit CRC4 error
counter.
2) The lower 2 bits of FASCR2 at address 04 are the most significant bits of the 10-bit E-bit counter.
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参数描述
DS21FT44N+ 功能描述:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl E1/E1 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
DS21Q348 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
DS21Q348B 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
DS21Q348DK 功能描述:网络开发工具 RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V
DS21Q348N 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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