NRZ Applications

Abstract: This application note covers how to decouple a framer from the line interface unit (LIU) so that the user can connect the LIU/framer to a Bipolar or NRZ mode device.

This application note applies to following single-chip transceivers: (T1) DS21352, DS21552, DS21Q352, and DS21Q552; (E1) DS21354, DS21554, DS21Q354, and DS21Q554; and (combination) DS2155, DS2156, DS21Q55, and DS21Q56.

Overview
The line interface unit (LIU) can be completely decoupled from the framer/formatter to interface to optical, HDSL, or other devices with an NRZ interface. It can then be used to corrupt data, insert framing errors, or insert CRC errors, etc.

The framer/formatter can generate/detect either bipolar or NRZ data format (determined by the ODF bit). Table 1 shows the register settings for the output data format. Figures 1 and 2 show how to interface the framer/formatter to devices with bipolar or NRZ data modes.

When the LIU receive side is interfaced to a device with NRZ data format, an OR-gate must be added to convert the bipolar data format into NRZ. See Figures 3 and 4 for both data mode applications.

Table 1. Output data format (ODF) regsiter settings

DS21352/552/Q352/Q552
CCR1: Common Control Register 1 (Address = 37 Hex)

TESE	ODF	RSAO	TSCLKM	RSCLKM	RESE	PLB	FLB	FUNCTION
X	0	X	X	X	X	X	X	Bipolar data
X	1	X	X	X	X	X	X	NRZ data

DS21354/554/Q354/Q554
TCR1: Transmit Control Register 1 (Address = 12 Hex)

ODF	TFPT	T16S	TUA1	TSiS	TSA1	TSM	TSIO	FUNCTION
0	X	X	X	X	X	X	X	Bipolar data
1	X	X	X	X	X	X	X	NRZ data

DS2155/56/Q55/Q56
IOCR1: I/O Configuration Register 1 (Address = 01 Hex)

RSMS	RSMS2	RSMS1	RSIO	TSDW	TSM	TSIO	ODF	FUNCTION
X	X	X	X	X	X	X	0	Bipolar data
X	X	X	X	X	X	X	1	NRZ data

The DS2155/56 provides a software control bit to separate or connect the LIU/framer when the LIUC pin is hardwired high. If the LIUC pin is connected low, then the LIUC bit has no effect (Table 2).

DS2155/56/Q55/Q56
LBCR: Loopback Control Register (Address = 4A Hex)

--	--	--	LIUC	LLB	RLB	PLB	FLB	FUNCTION
X	X	X	0	X	X	X	0	LIUC control

Table 2. LIU mux control

LIUC PIN	LIUC BIT	FUNCTION
0	0	LIU and framer separated
0	1	LIU and framer separated
1	0	LIU and framer connected
1	1	LIU and framer separated

Figure 1. Framer connection to bipolar mode device.

Figure 2. Framer connection to NRZ mode device.

Figure 3. LIU connection to bipolar device.

Figure 4. LIU connection to NRZ mode device.

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標(biāo)準(zhǔn)和白光發(fā)光二極管LED的基礎(chǔ)知識(shí)與驅(qū)動(dòng),LED circuits and applications 關(guān)鍵字：LED,驅(qū)動(dòng)，元件選擇

2018-09-20 18:24:05

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關(guān)于NRZ與PAM4信號(hào)差異

/56/100/400GHz）、PAM5（IEEE P802.3ab）、PAM8（IEEE P802.3bm）。..等多種不同位階數(shù)的編碼方式。PAM信號(hào)是繼NRZ（NonReturn-to-Zero

2020-07-02 14:40:03

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HMC706LC3C：13 Gbps，NRZ至RZ轉(zhuǎn)換器+3.3V電源陳舊數(shù)據(jù)表

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2021-04-27 17:45:08

關(guān)于200G NRZ光模塊的相關(guān)基礎(chǔ)知識(shí)介紹

目前由協(xié)議定義的200G光模塊主要有2種，第一種是8*25G NRZ QSFP-DD（double density）封裝形式；第二種是QSFP56封裝的4*50G PAM4形式。在這篇文章中，我主要

2021-06-26 14:39:16

1080

50G SFP56 DWDM光模塊與100G QSFP28 DWDM光模塊方案

DWDM密集波分技術(shù)經(jīng)歷了越來(lái)越高的調(diào)制速率，包括1.25G NRZ，2.5G NRZ，10G NRZ以及25G NRZ，采用高階調(diào)制PAM4的有50G PAM4和100G PAM4兩種速率；以及當(dāng)前非常具有競(jìng)爭(zhēng)力的DWDM相干調(diào)制技術(shù)，主要面向200G和400G，以及未來(lái)的800G高帶寬業(yè)務(wù)。

2022-06-06 16:23:19

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410

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Multimedia Processor for Mobile Applications(EMMA Mobile1) DDR SDRAM Interface 用戶手冊(cè)(R19UH0028EJ0500_EMMAMOBIL)

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MAX17552AEVKIT: Evaluation Kit for the MAX17552A (TDFN) in 5V Output Voltage Applications Data Sheet MAX17552AEVKIT: Evaluation Kit for the

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355

易飛揚(yáng)發(fā)布COLOR ZR+系列四載波（4×25G NRZ）平行100G QSFP28 DWDM4光模塊

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2023-11-29 17:42:12

469

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2023-12-29 10:05:32

1020

三星將展示16Gb GDDR7技術(shù)，重點(diǎn)關(guān)注PAM3優(yōu)化TRX均衡和ZQ校準(zhǔn)

該款高性能的 DRAM 采用 PAM3 編碼技術(shù)，兼具 PAM4 和 NRZ 的優(yōu)點(diǎn)，相較于 NRZ，它能夠以更高的數(shù)據(jù)傳輸率運(yùn)行，且無(wú)需過(guò)高的內(nèi)存總線頻率，表現(xiàn)優(yōu)于 GDDR6，能耗及成本則低于 GDDR6X。

2024-01-29 10:13:44

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