Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
40Maxim Integrated
Register Descriptions
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,
Register C1h).
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
00
<1>
THRESHOLD
0
TEMP ALARM HI TEMP ALARM LO TEMP WARN HI TEMP WARN LO
08
<1>
THRESHOLD
1
V
CC
ALARM HI V
CC
ALARM LO V
CC
WARN HI V
CC
WARN LO
10
<1>
THRESHOLD
2
TXB ALARM HI TXB ALARM LO TXB WARN HI TXB WARN LO
18
<1>
THRESHOLD
3
TXP ALARM HI TXP ALARM LO TXP WARN HI TXP WARN LO
20
<1>
THRESHOLD
4
RSSI ALARM HI RSSI ALARM LO RSSI WARN HI RSSI WARN LO
28–37 EMPTY EMPTY EMPTY EMPTY EMPTY EMPTY EMPTY EMPTY EMPTY
38–5F
<1>
EEPROM EE EE EE EE EE EE EE EE
60
<2>
ADC VALUES
0
TEMP VALUE V
CC
VALUE TXB VALUE TXP VALUE
68
<0>
ADC VALUES
1
<2>
RSSI VALUE
<2>
RESERVED
<2>
RESERVED
<0>
STATUS
<3>
UPDATE
70
<5>
ALARM/WARN ALARM
3
ALARM
2
RESERVED RESERVED WARN
3
WARN
2
RESERVED RESERVED
78
<0>
TABLE SELECT
<5>
RESERVED
<5>
RESERVED
<5>
RESERVED
<6>
PWE MSW
<6>
PWE MSW
<6>
PWE LSW
<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 All All PW2 All N/A PW1 PW2 N/A PW2 All
Write
Access
PW2 N/A
All and
device
hardware
PW2 +
mode
bit
All All PW1 PW2 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 EE EE EE EE EE EE EE EE
C0–F7
<8>
EEPROM EE EE EE EE EE EE EE EE
F8
<8>
ALARM ENABLE ALARM EN
3
ALARM EN
2
RESERVED RESERVED WARN EN
3
WARN EN
2
RESERVED RESERVED