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参数资料
| 型号： | WJLXT386LEB2 |
| 厂商： | INTEL CORP |
| 元件分类： | 数字传输电路 |
| 英文描述： | DATACOM, PCM TRANSCEIVER, PQFP100 |
| 封装： | 14 X 14MM, ROHS COMPLIANT, LQFP-100 |
| 文件页数： | 3/86页 |
| 文件大小： | 1081K |
| 代理商： | WJLXT386LEB2 |
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QUAD T1/E1/J1 Transceiver — LXT386
Datasheet
11
Table 1.
Pin Assignments and Signal Descriptions (Sheet 1 of 11)
Ball #
PBGA
Pin #
LQFP
Symbol
I/O
1
Description
E1
78
MCLK
DI
Master Clock. MCLK is an independent, free-running reference clock. It’s
frequency should be 1.544 MHz for T1 operation and 2.048 MHz for E1
operation.
This reference clock is used to generate several internal reference
signals:
Timing reference for the integrated clock recovery unit
Timing reference for the integrated digital jitter attenuator
Generation of RCLK signal during a loss of signal condition
Reference clock during a blue alarm transmit all ones condition
Reference timing for the parallel processor wait state generation logic
If MCLK is High, the PLL clock recovery circuit is disabled. In this mode,
the LXT386 operates as simple data receiver.
If MCLK is Low, the complete receive path is powered down and the
output pins RCLK, RPOS and RNEG are switched to Tri-state mode.
MCLK is not required if LXT386 is used as a simple analog front-end
without clock recovery and jitter attenuation.
Note that wait state generation via RDY/ACK is not available if MCLK is
not provided.
E2
79
MODE
DI
Mode Select. This pin is used to select the operating mode of the
LXT386. In Hardware Mode, the parallel processor interface is disabled
and hardwired pins are used to control configuration and report status.
In Parallel Host Mode, the parallel port interface pins are used to control
configuration and report status.
In Serial Host Mode the serial interface pins: SDI, SDO, SCLK and CS are
used.
For Serial Host Mode, the pin should connected to a resistive divider
consisting of two 10 k
Ω resistors across VCC and Ground.
F4
89
A4
DI
Address Select. In host mode, this pin is Address 4 input pin. In hardware
mode this pin must be connected to Ground.
1. DI: Digital Input; DO: Digital Output; DI/O: Digital Bidirectional Port; AI: Analog Input; AO: Analog Output S: Power Supply;
N.C.: Not Connected.
2. N/C means “Not Connected”
MODE
Operating Mode
L
Hardware Mode
H
Parallel Host Mode
Vcc/2
Serial Host Mode
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参数描述 |
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