MIC3000 Datasheet, PDF (34/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
Micrel
Voltage High Alarm Threshold MSB(VMAXh)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h (0V)
Serial Address
A2_h = 1010001_b
Byte Address
08 = 08_h
Each LSB represents 25.6mV. This register is to be used in conjunction with VMAXl to yield a sixteen-bit value. The
value in TMINh is compared against VINh. Alarm bit Ax is set if VINh > VMAXh.
Voltage High Alarm Threshold LSB(VMAXl)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h (0V)
Serial Address
A2_h = 1010001_b
Byte Address
09 = 09_h
Each LSB represents 100µV. This register is to be used in conjunction with VINh to yield a sixteen-bit value. The value
in VMAXh is compared against VINh. Alarm bit Ax is set if VINh > VMAXh. Since VINl is always zero, it is recom-
mended that this register always be programmed to zero. This register is provided for compliance with SFF-8472. It is
not used by the MIC3000 when doing threshold comparisons and setting alarm or warning bits.
Voltage Low Alarm Threshold MSB (VMINh)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h (0V)
Serial Address
A2_h = 1010001_b
Byte Address
10 = 0A_h
Each LSB represents 25.6mV. This register is to be used in conjunction with VMINl to yield a sixteen-bit value. The
value in this register is uncalibrated. The value in VMINh is compared against VINh. Alarm bit Ax is set if VINh<VMINh.
Voltage Low Alarm Threshold LSB (VMINl)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h (0V)
Serial Address
A2_h = 1010001_b
Byte Address
11 = 0B_h
Each LSB represents 100µV. This register is to be used in conjunction with VINh to yield a sixteen-bit value. The value
in VMINh is compared against VINh. Alarm bit Ax is set if VINh < VMINh. Since VINl is always zero, it is recommended
that this register always be programmed to zero. This register is provided for compliance with SFF-8472. It is not used
by the MIC3000 when doing threshold comparisons and setting alarm or warning bits.
M9999-101204
34
October 2004