參數(shù)資料
型號(hào)： DS21348TN
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PQFP44
封裝： TQFP-44
文件頁(yè)數(shù)： 19/67頁(yè)
文件大?。?/td> 339K
代理商： DS21348TN
DS21348/Q348
26 of 67
6.1
DEVICE POWER-UP & RESET
The DS21348 will reset itself upon power-up setting all writeable registers to 00h and clear the status and
information registers. CCR3.7 (TUA1) = 0 results in the LIU transmitting unframed all ones. After the
power supplies have settled following power-up, initialize all control registers to the desired settings, then
toggle the LIRST bit (CCR3.2). At anytime, the DS21348 can be reset to the default settings by bringing
HRST* (pin 29) low (level triggered) or by powering down and powering up again.
CCR4 (03H): COMMON CONTROL REGISTER 4
(MSB)
(LSB)
L2
L1
L0
EGL
JAS
JABDS
DJA
TPD
SYMBOL
POSITION
NAME AND DESCRIPTION
L2
CCR4.7
Line Build Out Select Bit 2. Sets the transmitter build out; see
Table 9-1 for E1 and Table 9-2 for T1.
L1
CCR4.6
Line Build Out Select Bit 1. Sets the transmitter build out; see
Table 9-1 for E1 and Table 9-2 for T1.
L0
CCR4.5
Line Build Out Select Bit 0. Sets the transmitter build out; see
Table 9-1 for E1 and Table 9-2 for T1.
EGL
CCR4.4
Receive Equalizer Gain Limit. This bit controls the
sensitivity of the receive equalizer. See Table 6-2.
JAS
CCR4.3
Jitter Attenuator Select.
0 = place the jitter attenuator on the receive side
1 = place the jitter attenuator on the transmit side
JABDS
CCR4.2
Jitter Attenuator Buffer Depth Select.
0 = 128 bits
1 = 32 bits (use for delay sensitive applications)
DJA
CCR4.1
Disable Jitter Attenuator.
0 = jitter attenuator enabled
1 = jitter attenuator disabled
TPD
CCR4.0
Transmit Power Down.
0 = normal transmitter operation
1 = powers down the transmitter and tri-states the TTIP and
TRING pins
Table 6-2 RECEIVE SENSITIVITY SETTINGS
EGL
(CCR4.4)
ETS
(CCR1.7)
RECEIVE SENSITIVITY
0
0 (E1)
-12 dB (short haul)
1
0 (E1)
-43 dB (long haul)
1
1 (T1)
-30 dB (limited long haul)
0
1 (T1)
-36 dB (long haul)
相關(guān)PDF資料
PDF描述
DS21348G DATACOM, PCM TRANSCEIVER, BGA49
DS21Q348N DATACOM, PCM TRANSCEIVER, PBGA144
DS21Q348 DATACOM, PCM TRANSCEIVER, PBGA144
DS21352L DATACOM, PCM TRANSCEIVER, PQFP100
DS21352LN DATACOM, PCM TRANSCEIVER, PQFP100
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21348TN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V E1/T1/J1 Line Interface 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
DS21348TNB 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
DS21348T-W 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
DS21349 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:3.3V T1/J1 Line Interface Unit
DS21349DK 功能描述:網(wǎng)絡(luò)開(kāi)發(fā)工具 DS21349 Design Kit RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類(lèi)型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類(lèi)型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
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