DS1876 datasheet(39/69 Pages) MAXIM

Nome de Peças	DS1876

Descrição Electrónicos	SFP Controller with Dual LDD Interface

PDF	69 Pages

Scroll/Zoom	100%

Fabricante Electrônico	MAXIM [Maxim Integrated Products]

Página de início	https://www.maximintegrated.com/en.html

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39 / 69 page

______________________________________________________________________________________ 39

SFP Controller with Dual LDD Interface

Lower Memory, Registers 75h–7Ah: RESERVED MEMORY

Lower Memory, Registers 7Bh–7Eh: PASSWORD ENTRY (PWE)

POWER-ON VALUE

READ ACCESS

N/A

WRITE ACCESS

N/A

A2h AND B2h MEMORY

N/A

MEMORY TYPE

N/A

These registers are reserved. The value when read is 00h.

POWER-ON VALUE

FFFF FFFFh

READ ACCESS

N/A

WRITE ACCESS

All

A2h AND B2h MEMORY

Common A2h and B2h memory location

MEMORY TYPE

Volatile

7Bh

231

230

229

228

227

226

225

224

7Ch

223

222

221

220

219

218

217

216

7Dh

215

214

213

212

211

210

7Eh

BIT 7

BIT 0

There are two passwords for the DS1876. Each password is 4 bytes long. The lower level password (PW1) has

all the access of a normal user plus those made available with PW1. The higher level password (PW2) has all the

access of PW1 plus those made available with PW2. The values of the passwords reside in EEPROM inside PW2

memory. At power-up, all PWE bits are set to 1. All reads at this location are 0.

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