DS1876 datasheet(54/69 Pages) MAXIM

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54 _____________________________________________________________________________________

SFP Controller with Dual LDD Interface

Table 02h, Register A2h–A3h: VCC OFFSET

Table 02h, Register A4h–A7h: RESERVED

Table 02h, Register A8h–A9h: BMON2 OFFSET

Table 02h, Register AAh–ABh: PMON2 OFFSET

Table 02h, Register ACh–ADh: BMON1 OFFSET

Table 02h, Register AEh–AFh: PMON1 OFFSET

Table 02h, Register B0h–B3h: PW1

FACTORY DEFAULT

00h

READ ACCESS

PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)

WRITE ACCESS

PW2 or (PW1 and RWTBL2)

A2h AND B2h MEMORY

Common A2h and B2h memory location

MEMORY TYPE

Nonvolatile (SEE)

A2h, A4h,

A6h, A8h,

AAh, ACh,

AEh

215

214

213

212

211

210

A3h, A5h,

A7h, A9h,

ABh, ADh,

AFh

BIT 7

BIT 0

Allows for offset control of these voltage measurements if desired. This number is two’s complement.

FACTORY DEFAULT

FFFF FFFFh

READ ACCESS

N/A

WRITE ACCESS

PW2 or (PW1 and WPW1)

MEMORY TYPE

Nonvolatile (SEE)

B0h

231

230

229

228

227

226

225

224

B1h

223

222

221

220

219

218

217

216

B2h

215

214

213

212

211

210

B3h

BIT 7

BIT 0

The PWE value is compared against the value written to this location to enable PW1 access. At power-on, the

PWE value is set to all ones. Thus, writing these bytes to all ones grants PW1 access on power-on without writing

the password entry. All reads of this register are 00h.

DS1876 Datasheet(PDF) 54 Page - Maxim Integrated Products

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