MIC3000 Datasheet, PDF (38/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
Micrel
Warning Threshold Registers
D[7]
read/write
D[6]
read/write
Temperature High Warning Threshold MSB (THIGHh)
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 (0°C)
Serial Address
A2_h = 1010001_b
Byte Address
04 = 04_h
Each LSB represents one degree centigrade. This register is to be used in conjunction with THIGHl to yield a sixteen-
bit temperature value. The value in this register is uncalibrated. The value in THIGHh is compared against TEMPh.
Warning bit Wx is set if TEMPh > THIGHh.
Temperature High Warning Threshold LSB (THIGHl)
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 (0°C)
Serial Address
A2_h = 1010001_b
Byte Address
05 = 05_h
This register is to be used in conjunction with THIGHh to yield a sixteen-bit temperature value. The value in this
register is uncalibrated. The value in THIGHh is compared against TEMPh. Warning bit Wx is set if THIGHh > TEMPh.
Since TEMPl 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.
Temperature Low Warning Threshold MSB (TLOWh)
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 (0°C)
Serial Address
A2_h = 1010001_b
Byte Address
06 = 06_h
Each LSB represents one degree centigrade. This register is to be used in conjunction with TLOWl to yield a sixteen-
bit temperature value. The value in this register is uncalibrated. The value in TLOWh is compared against TEMPh.
Warning bit Wx is set if TEMPh < TLOWh.
Temperature Low Warning Threshold LSB (TLOWl)
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 (0°C)
Serial Address
A2_h = 1010001_b
Byte Address
07 = 07_h
This register is to be used in conjunction with TLOWh to yield a sixteen-bit temperature value. The value in this register
is uncalibrated. The value in TLOWh is compared against TEMPh. Warning bit Wx is set if TEMPh < TLOWh. Since
TEMPl 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
38
October 2004