Rainbow Electronics DS1874 - Manual (Page 44)

DS1874
SFP+ Controller with Digital LDD Interface
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Lower Memory, Register 72h: ALARM
1
POWER-ON VALUE 00h
READ ACCESS All
WRITE ACCESS N/A
MEMORY TYPE Volatile
72h RESERVED RESERVED RESERVED RESERVED HBAL RESERVED TXP HI TXP LO
BIT 7 BIT 0
BITS 7:4 RESERVED
BIT 3
HBAL: High-Bias Alarm Status; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
BIT 2 RESERVED
BIT 1
TXP HI: High-Alarm Status TXP; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
BIT 0
TXP LO: Low-Alarm Status TXP; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was above threshold setting.
1 = Last comparison was below threshold setting.
POWER-ON VALUE 00h
READ ACCESS All
WRITE ACCESS N/A
MEMORY TYPE Volatile
73h LOS HI LOS LO RESERVED RESERVED BIAS MAX RESERVED RESERVED RESERVED
BIT 7 BIT 0
BIT 7
LOS HI: High-Alarm Status for MON3; Fast Comparison. A TXD event does not clear this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
BIT 6
LOS LO: Low-Alarm Status for MON3; Fast Comparison. A TXD event does not clear this alarm.
0 = (Default) Last comparison was above threshold setting.
1 = Last comparison was below threshold setting.
BITS 5:4 RESERVED
BIT 3
BIAS MAX: Alarm status for maximum digital setting of BIAS. A TXD event clears this alarm.
0 = (Default) The value for BIAS is equal to or below the IBIASMAX register.
1 = Requested value for BIAS is greater than the IBIASMAX register.
BITS 2:0 RESERVED
Lower Memory, Register 73h: ALARM 0