MIC3000 Datasheet, PDF (39/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
Micrel
Voltage High Warning Threshold MSB (VHIGHh)
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
12 = 0C_h
Each LSB represents 25.6mV. This register is to be used in conjunction with VHIGHl to yield a sixteen-bit value. The
value in this register is uncalibrated. The value in VHIGHh is compared against VINh. Warning bit Wx is set if VINh >
VHIGHh.
Votage High Warning Threshold LSB (VHIGHl)
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
13 = 0D_h
Each LSB represents 100µV. This register is to be used in conjunction with VHIGHh to yield a sixteen-bit value. The
value in VHIGHh is compared against VINh. Warning bit Wx is set if VINh > VHIGHh. 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.
Votage Low Warning Threshold MSB (VLOWh)
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
14 = 0E_h
Each LSB represents 25.6mV. This register is to be used in conjunction with VLOWl to yield a sixteen-bit value. The
value in this register is uncalibrated. The value in VLOWh is compared against VINh. Warning bit Wx is set if VINh <
VLOWhh.
Voltage Low Warning Threshold LSB (VLOWl)
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
15 = 0F_h
Each LSB represents 100µV. This register is to be used in conjunction with VLOWh to yield a sixteen-bit value. The
value in VLOWh is compared against VINh. Warning bit Wx is set if VINh < VLOWh. 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.
October 2004
39
M9999-101204