Datasheet > 78P2342JAT-IEL/A07R/F

78P2342JAT-IEL/A07R/F

更新时间： 2023-01-03 07:37:38

品牌	Logo	应用领域
东电化 - TDK		/
页数	文件大小	规格书
37页	458K
描述
Digital Transmission Interface, E-3, PQFP100

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78P2342JAT-IEL/A07R/F 数据手册

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78P2342JAT

2-port E3/DS3/STS-1 LIU

with Jitter Attenuator

LOCAL LOOPBACK AND REDUNDANCY MUX

Transmitter

Each receiver has a 4-input MUX as shown in the

adjacent figure. In multiport applications where

redundant channels are required, the receiver MUX

can be configured to provide the necessary

multiplexing functions. This allows the user to use

one port as a redundant monitor for the other port.

The tables below show the register settings for

selecting the desired receiver input source.

LOUTP1, LOUTN1

LINP1, LINN1

Receiver

LLBKA,B(1)

Transmitter

LOUTP2, LOUTN2

LINP2, LINN2

LLBKA

LLBKB

Receiver #1 Input

Source

(Port 1)

Receiver

LINP1/LINN1

LOUTP1/LOUTN1

LINP2/LINN2

LLBKA,B(2)

LOUTP2/LOUTN2

When serial interface control is not available, the

respective LPBKx pin for each of the channels can

also be used to activate local loopback mode as

shown below. Note that redundant channel modes

can only be activated using the serial interface.

LLBKA

LLBKB

Receiver #2 Input

Source

(Port 2)

LINP2/LINN2

LOUTP2/LOUTN2

LINP1/LINN1

LPBKx

Loopback Mode

LOUTP1/LOUTN1

Normal Operation

Note: The LLBKA and LLBKB bits are located in the

Same as LLBKA,B = ‘00’

Mode Control Register (MDCR).

The Register

Remote (Digital) Loopback

Control bit, REGEN, should be enabled when using

the register settings to avoid conflict with external

loopback setting pins.

Same as RLBK = ‘1’

Local (Analog) Loopback

Same as LLBKA,B = ‘01’

- 3 -

1 234 5 6 7...37

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