MIC3001GML Micrel Inc, MIC3001GML Datasheet - Page 29

• Manufacturer Part Number: MIC3001GML
• Description: IC FOM MANAGEMENT W/CALIBR 24MLF
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of MIC3001GML

• Protocol: SDHj Sonet
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-MLF®, QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -
• Other names: 576-1753-5; MIC3001GML

Micrel, Inc.
The LUTOFF register determines the range of measured
temperatures that are actually spanned by the tables. The
temperature span of the tables versus the value of
LUTOFF is given in Table 18.
The internal state machine calculates a new table index
each time a new average temperature value becomes
available. This table index is derived from the average
temperature value and LUTOFF. The table index is then
converted into a table address for each of the four look-up
tables. These operations can be expressed as:
August 2004
LUTOFF
00h
01h
02h
•
•
•
0Fh
Table 18. Range of Temperature Compensation
Table vs. LUTOFF
Temperature Span
t
0°C to 127°C
–2°C to 125°C
–4°C to +123°C
•
•
•
–30°C to 97°C
COMP
(min) – t
COMP
Figure 12. Examples of LUTOFF Operation
(max)
where TAVG(n) is the current average temperature; and
where BASE_ADDRESS is the physical base address of
each table, i.e., 00
I2CADR+4 page of memory).
At any given time, the current table index can be read in the
LUTINDX register.
Figures 12 and 13 illustrate the operation of the temperature
compensation tables.
Figure 12 is a graphical illustration of the use of the
LUTOFF register to control the temperature range spanned
by the temperature compensation tables. Note that, if the
LUTINDX becomes greater than 63 or less than zero, the
maximum or minimum table value is used, respectively. The
tables do not “roll over.”
Figure 13 llustrates that the table values are used as offsets
to the nominal value of the parameter in question. APCSET
is used as an example, but all four tables function
identically. Note that the shape and magnitude of the
compensation curve do not change as the nominal value
changes.
29
TABLE_ADDRESS=INDEX+BASE_ADDRES
h
, 40
[e-mail]
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, 80
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, or C0
h
(all tables reside in the
or [phone]
(12)
M9999-082404-A
MIC3001