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MEC1322 Datasheet(PDF) 412 Page - Microchip Technology

Part # MEC1322
Description  Keyboard and Embedded Controller for Notebook PC
PDF  456 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1322 Datasheet(HTML) 412 Page - Microchip Technology

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MEC1322
DS00001719D-page 412
 2014 - 2015 Microchip Technology Inc.
38.12 Fan Tachometer Timing
Note:
tTACH is the clock used for the tachometer counter. It is 30.52 * prescaler, where the prescaler is pro-
grammed in the Fan Tachometer Timebase Prescaler register.
FIGURE 38-18:
FAN TACHOMETER INPUT TIMING
TABLE 38-17: FAN TACHOMETER INPUT TIMING PARAMETERS
Name
Description
MIN
TYP
MAX
Units
t1
Pulse Time
100
µsec
t2
Pulse High Time
20
t3
Pulse Low Time
20
t3
t1
t2
FAN_TACHx



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