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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： | 39/110页 |
| 文件大小： | 526K |
| 代理商： | DS21FF44N |
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DS21FT44/DS21FF44
34 of 110
SYNC/RESYNC CRITERIA Table 10–1
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
–
SYMBOL
POSITION
NAME AND DESCRIPTION
Sa8S
RCR2.7
Sa8 Bit Select. Set to one to have RLCLK pulse at the Sa8
bit position; set to zero to force RLCLK low during Sa8 bit
position. See Section 22 for timing details.
Sa7S
RCR2.6
Sa7 Bit Select. Set to one to have RLCLK pulse at the Sa7
bit position; set to zero to force RLCLK low during Sa7 bit
position. See Section 22 for timing details.
Sa6S
RCR2.5
Sa6 Bit Select. Set to one to have RLCLK pulse at the Sa6
bit position; set to zero to force RLCLK low during Sa6 bit
position. See Section 22 for timing details.
Sa5S
RCR2.4
Sa5 Bit Select. Set to one to have RLCLK pulse at the Sa5
bit position; set to zero to force RLCLK low during Sa5 bit
position. See Section 22 for timing details.
Sa4S
RCR2.3
Sa4 Bit Select. Set to one to have RLCLK pulse at the Sa4
bit position; set to zero to force RLCLK low during Sa4 bit
position. See Section 22 for timing details.
RBCS
RCR2.2
Receive Side Backplane Clock Select.
0 = if RSYSCLK is 1.544 MHz
1 = if RSYSCLK is 2.048 MHz
RESE
RCR2.1
Receive Side Elastic Store Enable.
0 = elastic store is bypassed
1 = elastic store is enabled
–
RCR2.0
Not Assigned. Should be set to zero when written.
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PDF描述 |
|---|---|
| DS21FT40N | DATACOM, FRAMER, PBGA300 |
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| 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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