ABCU-5741AGZ datasheet(11/25 Pages) AVAGO

Part #	ABCU-5741AGZ

Description	Low Voltage (3.3 V) Electrical Transceiver over Category 5 Cable

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Manufacturer	AVAGO [AVAGO TECHNOLOGIES LIMITED]

Direct Link	http://www.avagotech.com

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11

Table 4. Summary of Internal IC Registers

Register

Description

0

Control

1

Status

2-3

N/A for SFP Module

4

Auto-Negotiation Advertisement

5

Auto-Negotiation Link Partner Ability

6

Auto-Negotiation Expansion

7

Auto-Negotiation Next Page Transmit

8

Auto-Negotiation Link Partner Received Next Page

9

MASTER-SLAVE Control Register

10

MASTER-SLAVE Status Register

11-15

N/A for SFP Module

16

Extended Control 1

17

Extended Status 1

18-19

N/A for SFP Module

20

Extended Control 2

21

Receive Error Counter

22

Cable Diagnostic 1

23-25

N/A for SFP Module

26

Extended Control 3

27

Extended Status 2

28

Cable Diagnostic 2

29-31

N/A for SFP Module

Internal ASIC Registers

The ASIC (or “PHY”, for Physical Layer IC) in the trans-

ceiver module contains 32 registers. Each register

contains 16 bits. The registers are summarized in

table 11 and detailed in table 12 through 28. Each bit

is either Read Only (RO) or Read/Write (R/W). Some

bits are also described as Latch High (LH) or Latch

Low (LL) and/or Self Clearing (SC).

The registers are accessible through the 2-wire se-

rial CMOS EEPROM protocol of the ATMEL AT24C01A

or equivalent. The address of the PHY is 1010110x,

where x is the R/W bit. Each register’s address is

000yyyyy, where yyyyy is the binary equivalent of the

register number. Write and read operations must send

or receive 16 bits of data, so the “multi-page” access

protocol must be used.

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