Datasheet

37Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
Lower Memory, Register 71h: ALARM
2
Lower Memory, Register 72h: RESERVED
POWER-ON VALUE 00h
READ ACCESS All
WRITE ACCESS N/A
A2h AND B2h MEMORY Mixed A2h and B2h memory locations
MEMORY TYPE Volatile
71h RSSI HI RSSI LO RESERVED RESERVED RESERVED RESERVED RESERVED FLTINT
BIT 7 BIT 0
BIT 7
RSSI HI: High alarm status for RSSI measurement. A TXD event does not clear this alarm.
0 = (default) Last measurement was equal to or below the threshold setting.
1 = Last measurement was above the threshold setting.
BIT 6
RSSI LO: Low alarm status for RSSI measurement. A TXD event does not clear this alarm.
0 = (default) Last measurement was equal to or above the threshold setting.
1 = Last measurement was below the threshold setting.
BITS 5:1 RESERVED
BIT 0
FLTINT: FAULT interrupt. This bit is the wire-ORed logic of all alarms and warnings wire-ANDed with
their corresponding enable bits. The enable bits are found in Table 01h/05h, Registers F8h–FFh.
POWER-ON VALUE 00h
READ ACCESS N/A
WRITE ACCESS N/A
A2h AND B2h MEMORY N/A
MEMORY TYPE N/A
This register is reserved.