Rainbow Electronics DS1874 - Manual (Page 30)

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 locat-
ed 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.
Lower Memory Register Map
DS1874
SFP+ Controller with Digital LDD Interface
30 ______________________________________________________________________________________
LOWER MEMORY
WORD 0 WORD 1 WORD 2 WORD 3 ROW
(hex)
ROW NAME
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 MON1 ALARM HI MON1 ALARM LO MON1 WARN HI MON1 WARN LO
18 <1> THRESHOLD 3 MON2 ALARM HI MON2 ALARM LO MON2 WARN HI MON2 WARN LO
20 <1> THRESHOLD 4 MON3 ALARM HI MON3 ALARM LO MON3 WARN HI MON3 WARN LO
28 <1> THRESHOLD 5 MON4 ALARM HI MON4 ALARM LO MON4 WARN HI MON4 WARN LO
30–5F <1> EEPROM EE EE EE EE EE EE EE EE
60
<2> ADC
VALUES 0
TEMP VALUE V CC VALUE MON1 VALUE MON2 VALUE
68
<0> ADC
VALUES 1
<2> MON3 VALUE <2> MON4 VALUE <2> RESERVED <0> STATUS <5> UPDATE
70
<2> ALARM/
WARN
ALARM 3 ALARM 2 ALARM 1 ALARM 0 WARN 3 WARN 2 RESERVED
78
<0> TABLE
SELECT
<5> RESERVED
<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
All All All PW2 All N/A PW1 PW2 N/A PW2 All
Write
Access
See each
bit/byte
separately
PW2 N/A
All and
DS1874
hardware
PW2 +
mode
bit
All All PW1 PW2 PW2 N/A PW1