Instruction Manual
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DS1876
SFP Controller with Dual LDD Interface
Lower Memory Register Map
Table 01h Register Map
<C> or <_/C> = Common, <D> or <_/D> = Different, <M> or <_/M> = Mixture of common and different.
<C> or <_/C> = Common, <D> or <_/D> = Different, <M> or <_/M> = Mixture of common and different.
Note: The ALARM ENABLE bytes (Registers F8h–FFh) can be configured to exist in Table 05h instead of here at Table 01h with
the MASK bit (Table 02h, Register 88h). If the row is configured to exist in Table 05h, these location are empty in Table 01h.
The access codes represent the factory default values of PW_ENA and PW_ENB (Table 02h, Registers C0h–C1h).
These registers also allow for custom permissions.
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/C>
THRESHOLD
0
TEMP ALARM HI TEMP ALARM LO TEMP WARN HI TEMP WARN LO
08
<1/C >
THRESHOLD
1
V
CC
ALARM HI V
CC
ALARM LO V
CC
WARN HI V
CC
WARN LO
10
<1/D>
THRESHOLD
2
BMON ALARM HI BMON ALARM LO BMON WARN HI BMON WARN LO
18
<1/D>
THRESHOLD
3
PMON ALARM HI PMON ALARM LO PMON WARN HI PMON WARN LO
20–40
<1/C >
EEPROM EE EE EE EE
48–50
<1/D >
EEPROM EE EE EE EE
58
<1/C >
EEPROM EE EE EE EE EE EE EE EE
60
<2/M>
ADC VALUES
0
<C>
TEMP VALUE
<C>
V
CC
VALUE
<D>
BMON VALUE
<D>
PMON VALUE
68
<0/M>
ADC VALUES
1
RESERVED RESERVED RESERVED
<0/M>
STATUS
<3/D>
UPDATE
70
<5/D>
ALARM/WARN ALARM
3
ALARM
2
ALARM
1
RESERVED WARN
3
RESERVED RESERVED RESERVED
78
<0/M>
TABLE SELECT RESERVED RESERVED RESERVED
<6/C>
PWE MSW
<6/C>
PWE LSW
<5/D>
TBL SEL
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–F7
<1/C>
EEPROM EE EE EE EE EE EE EE EE
F8
<7/M>
ALARM ENABLE
<M>
ALARM EN
3
RESERVED
<D>
ALARM EN
1
RESERVED
<M>
WARN EN
3
RESERVED RESERVED RESERVED
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
DS1876
Hardware
PW2 +
mode
bit
All All PW1 PW2 PW2 N/A PW1