参数资料
型号: DS21FT40
厂商: DALLAS SEMICONDUCTOR
元件分类: Digital Transmission Controller
英文描述: DATACOM, FRAMER, PBGA300
封装: BGA-300
文件页数: 19/87页
文件大小: 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
SYNCE
RCR1.1
Sync Enable.
0 = auto resync enabled
1 = auto resync disabled
RESYNC
RCR1.0
Resync. When toggled from low to high, a resync is initiated.
Must be cleared and set again for a subsequent resync.
SYNC/RESYNC CRITERIA Table 5–1
FRAME OR
MULTIFRAME
LEVEL
SYNC CRITERIA
RESYNC CRITERIA
ITU SPEC.
FAS
FAS present in frame N and
N + 2, and FAS not present
in frame N + 1
Three consecutive incorrect
FAS received
Alternate (RCR1.2=1) the
above criteria is met or
three consecutive incorrect
bit 2 of non–FAS received
G.706
4.1.1
4.1.2
CRC4
Two valid MF alignment
words found within 8 ms
915 or more CRC4 code
words out of 1000 received
in error
G.706
4.2 and 4.3.2
CAS
Valid MF alignment word
found and previous timeslot
16 contains code other than
all zeros
Two consecutive MF
alignment words received
in error
G.732 5.2
RCR2: RECEIVE CONTROL REGISTER 2 (Address=11 Hex)
(MSB)
(LSB)
Sa8S
Sa7S
Sa6S
Sa5S
Sa4S
RBCS
RESE
SYMBOLS
POSITION
NAME AND DESCRIPTION
Sa8S
RCR2.7
Sa8 Bit Select. Not applicable for DS21FT40.
Sa7S
RCR2.6
Sa7 Bit Select. Not applicable for DS21FT40.
Sa6S
RCR2.5
Sa6 Bit Select. Not applicable for DS21FT40.
Sa5S
RCR2.4
Sa5 Bit Select. Not applicable for DS21FT40.
Sa4S
RCR2.3
Sa4 Bit Select. Not applicable for DS21FT40.
相关PDF资料
PDF描述
DS21FT42 DATACOM, FRAMER, PBGA300
DS21FT42N DATACOM, FRAMER, PBGA300
DS21FF42 DATACOM, FRAMER, PBGA300
DS21FF42N DATACOM, FRAMER, PBGA300
DS21FT44N DATACOM, FRAMER, PBGA300
相关代理商/技术参数
参数描述
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: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
DS21FT44+ 功能描述:网络控制器与处理器 IC 4X3 E1 Framer E1 Framer 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