DS1884 datasheet(54/92 Pages) MAXIM

54 / 92 page

DS1884

SFP and PON ONU Controller

with Digital LDD Interface

Maxim Integrated

A2h Lower Memory, Register 7Bh–7Eh: PASSWORD ENTRY (PWE)

A2h Lower Memory, Register 7Fh: TBL SEL

POWER-ON VALUE

FFFF FFFFh

READ ACCESS

N/A

WRITE ACCESS

ALL

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 DS1884. Each password is 4 bytes long. The lower level password (PW1) will have all the

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

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

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

POWER-ON VALUE

TBLSELPON (A2h Table 02h, Register C7h).

READ ACCESS

All

WRITE ACCESS

All

MEMORY TYPE

Volatile

7Fh

BIT 7

BIT 0

The upper memory tables of the DS1884 are accessible by writing the desired table value in this register. The power-on

value of this register is defined by the value written to TBLSELPON (A2h Table 02, Register C7h).

DS1884 Datasheet(PDF) 54 Page - Maxim Integrated Products

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