DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 40

• Manufacturer Part Number: DS1864
• Description: SFP Laser Controller and Diagnostic IC
• Manufacturer: Maxim Integrated Products

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SFP Laser Controller and
Diagnostic IC
40
Lower Memory Register 77h: Conversion Updates
POWER-ON VALUE:
MEMORY TYPE:
Each of the status bits becomes a 1 after an update has occurred for the corresponding measurement. The user can write any of
the status bits to a 0 and monitor for a transition to a 1 to verify that a measurement has occurred.
Lower Memory Register 78h to 7Ah: Reserved Memory
78h to 7Ah
____________________________________________________________________
77h
TAU
bit7
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
TAU: Temperature measurement update status bit.
0 = Temperature measurement has not yet been updated.
1 = Temperature measurement has been updated.
V
0 = V
1 = V
MON1U: MON1 measurement update status bit
0 = MON1 measurement has not yet been updated.
1 = MON1 measurement has been updated.
MON2U: MON2 measurement update status bit.
0 = MON2 measurement has not yet been updated.
1 = MON2 measurement has been updated.
MON3U: MON3 measurement update status bit.
0 = MON3 measurement has not yet been updated.
1 = MON3 measurement has been updated.
This status bit is set to 0.
This bit is reserved and reads as 0.
RSSIS: Indicates which range is being reported for MON3 internal calibration.
0 = Fine range is being reported.
1 = Coarse range is being reported.
CC
V
U: V
CC
00h
Volatile (SRAM)
CC
CC
U
CC
measurement has not yet been updated.
measurement has been updated.
measurement update status bit.
MON1U
MON2U
RESERVED
MON3U
0
0
RSSIS
bit0