DS1884 datasheet(39/92 Pages) MAXIM

39 / 92 page

DS1884

SFP and PON ONU Controller

with Digital LDD Interface

Maxim Integrated

The register maps show each byte/word (2 bytes) in terms of its row in the memory. The first byte in the row is located in

memory at the row address (hexadecimal) in the leftmost column. Each subsequent byte on the row is one/two memory

locations beyond the previous byte/word’s address. A total of 8 bytes are present on each row. For more information

about each of these bytes, see the corresponding register description.

A2h Lower Memory Register Map

A2h Table 01h Register Map

The access codes represent the factory default values of PW_ENA (A2h Table 02h, Register C0h) and PW_ENB (A2h Table 02h,

Note: The ALARM ENABLE bytes (Registers F8h–FFh) can be configured to exist in A2h Table 05h instead of here at A2h Table

01h with the MASK bit (A2h Table 02h, Register 89h). If the row is configured to exist in A2h Table 05, then these locations are EE

in A2h Table 01h.

LOWER MEMORY

ROW

(HEX)

ROW NAME

WORD 0

WORD 1

WORD 2

WORD 3

BYTE 0/8

BYTE 1/9

BYTE 2/A

BYTE 3/B

BYTE 4/C

BYTE 5/D

BYTE 6/E

BYTE 7/F

<1>THRESHOLD0

TEMP ALARM HI

TEMP ALARM LO

TEMP WARN HI

TEMP WARN LO

<1>THRESHOLD1

VCC ALARM HI

VCC ALARM LO

VCC WARN HI

VCC WARN LO

<1>THRESHOLD2

TXB ALARM HI

TXB ALARM LO

TXB WARN HI

TXB WARN LO

<1>THRESHOLD3

TXP ALARM HI

TXP ALARM LO

TXP WARN HI

TXP WARN LO

<1>THRESHOLD4

RSSI ALARM HI

RSSI ALARM LO

RSSI WARN HI

RSSI WARN LO

28–37

EMPTY

38–5F

<1>EEPROM

<2>ADC VALUES0

TEMP VALUE

VCC VALUE

TXB VALUE

TXP VALUE

<0>ADC VALUES1

<2>RSSI VALUE

<2>RESERVED

<0>STATUS

<3>UPDATE

<5>ALARM/WARN

ALARM3

ALARM2

RESERVED

WARN3

WARN2

RESERVED

<0> TABLE SELECT

<5>RESERVED

<6>PWE MSW

<6>PWE LSW

<5>TBL SEL

ACCESS

CODE

<0>

<1>

<2>

<3>

<4>

<5>

<6>

<7>

<8>

<9>

<10>

<11>

Read

Access

See each

bit/byte

separately

All

PW2

All

N/A

PW1

PW2

N/A

PW2

All

Write

Access

PW2

N/A

All and

device

hardware

PW2 +

mode

bit

All

PW1

PW2

N/A

PW1

A2h TABLE 01h

ROW

(HEX)

ROW NAME

WORD 0

WORD 1

WORD 2

WORD 3

BYTE 0/8

BYTE 1/9

BYTE 2/A

BYTE 3/B

BYTE 4/C

BYTE 5/D

BYTE 6/E

BYTE 7/F

80–BF

<7>EEPROM

C0–F7

<8>EEPROM

<8>ALARM ENABLE

ALARM EN3

ALARM EN2

RESERVED

WARN EN3

WARN EN2

RESERVED

DS1884 Datasheet(PDF) 39 Page - Maxim Integrated Products

DS1884 Datasheet(HTML) 39 Page - Maxim Integrated Products

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