參數(shù)資料
型號： DS21348G
英文描述： 3.3V E1/T1/J1 Line Interface
中文描述： 3.3 E1/T1/J1線路接口
文件頁數(shù)： 31/73頁
文件大小： 551K
代理商： DS21348G
DS21348/Q348
31 of 73
6.1 Device Power-Up and 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)
L2
L1
L0
(LSB)
TPD
EGL
JAS
JABDS
DJA
SYMBOL
POSITION
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.
Line Build Out Select Bit 1.
Sets the transmitter build out; see
Table 9-1 for E1 and Table 9-2 for T1.
Line Build Out Select Bit 0.
Sets the transmitter build out; see
Table 9-1 for E1 and Table 9-2 for T1.
Receive Equalizer Gain Limit.
This bit controls the sensitivity
of the receive equalizer. See Table 6-2.
Jitter Attenuator Select.
0 = place the jitter attenuator on the receive side
1 = place the jitter attenuator on the transmit side
Jitter Attenuator Buffer Depth Select.
0 = 128 bits
1 = 32 bits (use for delay sensitive applications)
Disable Jitter Attenuator.
0 = jitter attenuator enabled
1 = jitter attenuator disabled
Transmit Power-Down.
0 = normal transmitter operation
1 = powers down the transmitter and 3-states the TTIP and
TRING pins
L1
CCR4.6
L0
CCR4.5
EGL
CCR4.4
JAS
CCR4.3
JABDS
CCR4.2
DJA
CCR4.1
TPD
CCR4.0
RECEIVE SENSITIVITY SETTINGS
Table 6-2
EGL
(CCR4.4)
0
1
1
0
ETS
(CCR1.7)
0 (E1)
0 (E1)
1 (T1)
1 (T1)
RECEIVE SENSITIVITY
-12dB (short haul)
-43dB (long haul)
-30dB (limited long haul)
-36dB (long haul)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21348G+ 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
DS21348G+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
DS21348GB 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
DS21348GN 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
DS21348GN+ 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
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