MIC3003 Datasheet, PDF (53/75 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3003
Power-On Hours (POHh and POHl)
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 of both bytes when the
MIC3003 is shipped from the factory
0000 0000b = 00h
Serial address
A6h
Bytes addresses
MS byte (POHh): 251 = FBh
LS byte (POHl): 252 = FCh
The lower seven bits of POHh contain the most significant bits of the 15-bit power-on hours measurement. The value in POHh
should be combined with the eight-bit power-on hours low byte, POHl, to yield the complete result.
The most significant bit of POHh, POHFLT, is an error flag. If POHFLT is set, the power-on hour meter data has been
corrupted and should be ignored.
It is recommended that a two-byte sequential (block) SMBus read operation be performed on POHh and POHl to insure
coherency between the two registers.
This register is non-volatile and will be maintained through power and reset cycles, including unanticipated power failures.
POHh Bit(s)
D[7]
D[6:0]
Function
Power-on hours fault flag, POHFLT
Power-on hours, most significant seven bits
Operation
1 = fault: the power-on hours value is corrupted and cannot
be relied upon
0 = no fault: the power-on hours value is correct
Data Ready Flags (DATARDY)
D[7]
TRDY
read/write
D[6]
VRDY
read/write
D[5]
IRDY
read/write
D[4]
TXRDY
read/write
D[3]
RXDY
read/write
D[2]
reserved
D[1]
reserved
D[0]
reserved
Default value
0000 0000b = 00h
Serial address
A6h
Byte address
253 = FDh
When the A/D conversion for a given parameter is completed and the results available to the host, the appropriate data ready
flag will be set. The flag will be cleared when the host reads the corresponding result register.
Bit(s)
D[7]
TRDY
D[6]
VRDY
D[5]
IRDY
D[4]
TXRDY
D[3]
RXRDY
D[2:0]
Function
Temperature data ready flag
Voltage data ready flag
Bias current data ready flag
Transmit power data ready flag
Receive power data ready flag
Reserved
Operation
0 = Result register contains old data; 1 = new data ready
0 = Result register contains old data; 1 = new data ready
0 = Result register contains old data; 1 = new data ready
0 = Result register contains old data; 1 = new data ready
0 = Result register contains old data; 1 = new data ready
Reserved
November 2009
53
M9999-111209-C
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