Datasheet
43Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
Table 01h, Register FDh–FFh: RESERVED
Table 02h Register Descriptions
Table 02h, Register 80h: MODE
POWER-ON VALUE 00h
READ ACCESS N/A
WRITE ACCESS N/A
A2h AND B2h MEMORY N/A
MEMORY TYPE N/A
These registers are reserved.
POWER-ON VALUE 7Fh
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
A2h AND B2h MEMORY Common A2h and B2h memory locations
MEMORY TYPE Volatile
80h SEEB DAC2EN RESERVED RESERVED AEN DAC1EN RESERVED RESERVED
BIT 7 BIT 0
BIT 7
SEEB:
0 = (default) Enables EEPROM writes to SEE bytes.
1 = Disables EEPROM writes to SEE bytes during configuration, so that the configuration of the part
is not delayed by the EE cycle time. Once the values are known, write this bit to a 0 and write the
SEE locations again for data to be written to the EEPROM.
BIT 6
DAC2EN:
0 = DAC2 VALUE is writable by the user and the LUT recalls are disabled. This allows users to
interactively test their modules by writing the values for DAC2. The output is updated with the new
value at the end of the write cycle. The I
2
C STOP condition is the end of the write cycle.
1 = (default) Enables automatic control of the LUT for DAC2 VALUE.
BITS 5, 4,
1, 0
RESERVED
BIT 3
AEN:
0 = The temperature-calculated index value TINDEX is writable by the user and the updates of cal-
culated indexes are disabled. This allows the user to interactively test the modules by controlling
the indexing for the LUTs. The recalled values from the LUTs appear in the DAC registers after the
next completion of a temperature conversion.
1 = (default) The temperature-calculated index value TINDEX is used to control the LUTs.
BIT 2
DAC1EN:
0 = DAC1 VALUE is writable by the user and the LUT recalls are disabled. This allows the user to
interactively test their modules by writing the values for DAC1. The output is updated with the new
value at the end of the write cycle. The I
2
C STOP condition is the end of the write cycle.
1 = (default) Enables automatic control of the LUT for DAC1 VALUE.