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MEC1322 데이터시트(PDF) 303 Page - Microchip Technology

부품명 MEC1322
상세설명  Keyboard and Embedded Controller for Notebook PC
PDF  456 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1322 데이터시트(HTML) 303 Page - Microchip Technology

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 2014 - 2015 Microchip Technology Inc.
DS00001719D-page 303
MEC1322
26.9.7
FAN STEP REGISTER
The Fan Step Register, along with the Update Time, controls the ramp rate of the fan driver response calculated by the
RPM based Fan Control Algorithm for the Derivative Options field values of “00” and “01” in the Fan Configuration 2
Register (see Table 26-12, “Derivative Options,” on page 301).
The value of the register represents the maximum step size the fan driver will take for each update (see Section 26.9.3,
"Fan Configuration 1 Register," on page 298).
When the maximum step size limitation is applied, if the necessary fan driver delta is larger than the Fan Step, it will be
capped at the Fan Step setting and updated every Update Time ms.
The maximum step size is ignored for the Derivative Options field values of “10” and “11”.
1
0
32 - the Drive Fail detection circuitry will count for 32 update periods
1
1
64 - the Drive Fail detection circuitry will count for 64 update periods
TABLE 26-16: SPIN LEVEL
SPIN_LVL[2:0]
Spin Up Drive Level
21
0
0
0
0
30%
0
0
1
35%
0
1
0
40%
0
1
1
45%
1
0
0
50%
1
0
1
55%
1
1
0
60% (default)
1
1
1
65%
TABLE 26-17: SPIN TIME
SPINUP_TIME[1:0]
Total Spin Up Time
10
0
0
250 ms
0
1
500 ms (default)
10
1 sec
11
2 sec
Offset
07h
Bits
Description
Type
Default
Reset
Event
7:6 RESERVED
R/W
00h
-
5:0 FAN_STEP[5:0]
The Fan Step value represents the maximum step size the fan driver
will take between update times
R/W
10h
VCC1_R
ESET
TABLE 26-15: DRIVE_FAIL_CNT[1:0] BIT DECODE (CONTINUED)
DRIVE_FAIL_CNT[1:0]
Number of Update Periods
10



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