MIC3001 Datasheet, PDF (61/74 Pages) Micrel Semiconductor – SFP Management IC with Internal Calibration

MIC3001
Bit
D[7]
D[6]
ADSTP
D[5]
ADIDL
D[4]
1SHOT
D[3]
ADSPIN
D[2], D[1], SPIN[2:0]
D[0]
Micrel
Function
Operation
Reserved
Always write as zero; reads undefined.
Stop ADC Halts the analog to digital converter 0 = normal operation; 1 = stopped; Read/write.
ADC idle flag
0 = busy; 1 = idle; Read/write.
Triggers one-shot A/D conversion cycle
0 = normal operation; 1 = one-shot; Read/write.
Selects ADC spin-on-channel mode; do not
enable ADC and FC spin-on-channel modes
simultaneously
0 = normal operation; 1 = spin-on-channel;
Read/write.
ADC and fault comparator (FC) channel select for ADC: 000 = temperature; 001 = voltage; 010 = VILD;
spin-on-channel mode; do not enable ADC and 011 = VMPD; 100 = VRX; FC: 001 = VILD;
FC spin-on-channel modes simultaneously
001 = VMPD; 010 = VRX; Read/write.
Look-Up Table Index (LUTINDX)
Look-up table index as determined by temperature compensation logic
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
Serial Address
0000 0000_b = 00_h
A6h = 1010011b
Byte Address
18 = 12h
The look-up table index is derived from the current temperature measurement and LUTOFF as follows:
INDEX
=

T_AVG
2
(µ)
+ LUTOFF
where
T_AVG(n)
is
the
current
average
temperature.
This
register
allows
the
current
table
index to be read by the host. The table base address must be added to LUTINDX to form a complete table index in
physical memory. A valid OEM password is required for access to this register. Otherwise, reads are undefined.
OEM Configuration 3 (OEMCFG3)
D[7]
LUTSEL
read/write
D[6]
TXFPOL
read/write
D[5]
GPOD
read/write
D[4]
GPOM
read/write
D[3]
GPOC
read/write
D[2]
TXFIN
read/write
D[1]
LOSDIS
read/write
D[0]
INTCAL
read/write
Default Value
0000 1000_b = 08_h
Serial Address
A6_h = 1010011_b
Byte Address
19 = 13_h
This register is non-volatile and will be maintained through power and reset cycles. A valid OEM password is required
for access to this register. GPOD and GPOC are ignored when GPOM = 0. TXFPOL is ignored if TXFIN = 0.
Bit
D[7]
LUTSEL
D[6]
TXFPOL
D[5]
GPOD
D[4]
GPOM
D[3]
GPOC
D[2]
TXFIN
D[1]
LOSDIS
D[0]
INTCAL
Function
RX power look-up table input selection bit
TXFIN active polarity select; a fault is indicated
when TXFIN = TXFPOL
GPO output drive
GPO/RSOUT mode select
GPO output control
TXFIN mode select
RXLOS comparator disable
Calibration mode select
Operation
1 = RX power;
0 = temperature; read/write; ignored if INTCAL = 0.
0 = active-low;
1 = active-high; read/write; ignored if TXFIN = 0.
0 = open drain;
1 = push-pull; read/write; ignored if GPOM = 0.
0 = RSOUT; 1 = GPO; read/write.
0 = low; 1 = high; read/write; ignored if GPOM = 0.
0 = SHDN; 1 = TXFIN; read/write.
0 = enabled; 1 = disabled; read/write.
0 = external calibration;
1 = internal calibration; read/write.
August 2004
61
M9999-082404