MIC3000_07 Datasheet, PDF (59/68 Pages) Micrel Semiconductor – FOM Management IC

MIC3000
Micrel
OEM Readback Register (OEMRD)
D[7]
reserved
D[6]
reserved
D[5]
reserved
D[4]
INT
read only
D[3]
APCSAT
read only
D[2]
IBFLT
read only
D[1]
TXFLT
read only
D[0]
RSOUT
read only
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
22 = 16_h
This register reflects (reads back) the status of the bits corresponding to the parameters defined below. A valid OEM
password is required for access to this register. Otherwise, reads are undefined and writes are ignored.
Bit
D[7:5]
D[4]
INT
D[3]
APCSAT
D[2]
IBFLT
D[1]
TXFLT
D[0]
RSOUT
Function
Reserved
Mirrors state of /INT but active-high; not state of
physical pin!
APC saturation fault comparator output state
State of IBIAS over-current fault comparator
output
State of transmit power fault comparator output
State of the rate select output pin, RSOUT
Operation
Always write as zero; reads undefined.
1 = interrupt; 0 = no interrupt.
1 = fault; 0 = normal operation.
1 = fault; 0 = normal operation; read-only.
1 = fault; 0 = normal operation; read-only.
1 = high; 0 = low; Read-only.
Power-On Hour Meter Data (POHDATA)
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
Serial Address
A6_h = 1010011_b
Byte Address
32-39 = 20_h - 27_h
These registers are used for backing up the POH result during power cycles. At power-up, the POH meter selects the
larger of the two values as the initial count. Incremental results are stored in alternate register pairs. The power-on
hour meter may be reset or preset by writing to these registers. These registers are non-volatile and will be maintained
through power and reset cycles. A valid OEM password is required for access to these registers.
BYTE
3
2
1
0
POHA, high-byte
POHA, low-byte
POHB, high-byte
POHB, low-byte
Weight
OEM Scratchpad Registers (SCRATCHn)
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
SCRATCH0: 126 = 7E_h
SCRATCH1: 127 = 7F_h
SCRATCH2: 128 = 80_h
.......................................
SCRATCH127: 253 = FD_h
The scratchpad registers are general-purpose non-volatile memory locations. They can be freely read from and written
to any time the MIC3000 is in OEM mode.
October 2004
59
M9999-101204