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參數(shù)資料
| 型號(hào)： | DS2180A |
| 英文描述： | T1 Transceiver |
| 中文描述： | T1收發(fā)器 |
| 文件頁數(shù)： | 7/35頁 |
| 文件大?。?/td> | 481K |
| 代理商： | DS2180A |
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DS2180A
7 of 35
ACB: ADDRESS COMMAND BYTE
Figure 4
(MSB)
(LSB)
LPBK
-
FRSR2
EYELMD
FM
SYELMD
B8ZS
B7
SYMBOL
-
FRSR2
POSITION
CCR.7
CCR.6
NAME AND DESCRIPTION
Reserved, must be 0 for proper operation.
Function of REC Status Register 2.
0 = Detected B8ZS code words reported at RSR.2.
1 = COFA (Change-of-Frame Alignment) reported at RSR.2 when
last resync resulted in change of frame or multiframe alignment.
193E Yellow Mode Select.
0 = Yellow alarm is a repeating pattern set of 00 hex and FF hex.
1 = Yellow alarm is a 0 in the bit 2 position of all channels.
Frame Mode Select.
0 = D4 (193S, 12 frames/superframe).
1 = Extended (193E, 24 frames/superframe).
193S Yellow Mode Select.
Determines yellow alarm type to be
transmitted and detected while in 193S framing. If set, yellow
alarms are a 1 in the S-bit position of frame 12; if cleared, yellow
alarm is a 0 in bit 2 of all channels. Does not affect 193E yellow
alarm operation.
Bipolar eight zero substitution.
0 = No B8ZS.
1 = B8ZS enabled.
(Note: This bit must be set to 0 when CCR.1=1)
Bit seven zero suppression.
If CCR.1=1, channels with an all zero
content will be transmitted with bit 7 forced to 1. If CCR.1=0, no
bit 7 stuffing occurs.
(Note: This bit must be set to 0 when CCR.2=1)
Loopback.
When set, the device internally loops output transmit
data into the incoming receive data buffers and TCLK is internally
substituted for RCLK.
EYELMD
CCR.5
FM
CCR.4
SYELMD
CCR.3
B8ZS
CCR.2
B7
CCR.1
LPBK
CCR.0
LOOPBACK
(Refer to Figure 4)
Enabling loopback will typically induce an out-of-frame (OOF) condition. If appropriate bits are set in
the receive control register, the receiver will resync to the looped transmit frame alignment. During the
looped condition, the transmit outputs (TPOS, TNEG) will transmit unframed all 1's. All operating modes
(B8ZS, alarm, signaling, etc.) except for blue alarm transmission are available in loopback.
BIT SEVEN STUFFING
Existing systems meet 1's density requirements by forcing bit 7 of all zero channels to 1. Bit 7 stuffing is
globally enabled by asserting bit CCR.1 and may be disabled on an individual channel basis by setting
appropriate bits in TTR1–TTR3. Bit 7 stuffing and B8ZS modes should not be enabled simultaneously.
Enabling both results in LOS.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2180A+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC T1 Transceiver 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 |
| DS2180AN | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC T1 Transceiver 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 |
| DS2180AQ | 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 |
| DS2180AQ/T&R | 制造商:Maxim Integrated Products 功能描述:T1 TRANSCEIVER-PLCC-TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TRANSCEIVER T1 44-PLCC 制造商:Maxim Integrated Products 功能描述:Network Controller & Processor ICs T1 Transceiver |
| DS2180AQ/T&R+ | 制造商:Maxim Integrated Products 功能描述:T1 TRANSCEIVER PLCC TRL LF - Tape and Reel |
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