DELTA ELECTRONICS, INC.
9 2008/3/18
Rev. 0A
www.deltaww.com
Enhanced Digital Diagnostic Interface
The memory map in the following describes an extension to the memory map defined in SFP MSA. The enhanced
interface uses the two wire serial bus address 1010001X(A2h) to provide diagnostic information about the module’s
present operating conditions.
2 wire address 1010000 X (A0h)
2 wire address 1010001 X (A2h)
0 0
55
Alarm and Warning Thresholds
(56 bytes)
95
Serial ID Defined by SFP MSA
(96 bytes)
56
95
Cal Constants
(40 bytes)
96 96
119
Real Time Diagnostic Interface
(24 bytes)
127
Vender Specific
(32 bytes)
120
127
Vender Specific(Note)
128 128
247
User Writable EEPROM
(120 bytes)
255
Reserved in SFP MSA
(128 bytes)
248
255
Vender Specific
(8 bytes)
Digital Diagnostic Memory Map Specific Data Field Descriptions
Note:
1) Write the password (11h, 11h, 11h, 11h) on the bytes of 123-126 of address A2h then the address of
bytes 128-255 (User Writable) can be read and written.
