MEC1322 Datasheet, PDF (401/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

38.4 LPC LCLK Timing
FIGURE 38-6:
LPC CLOCK TIMING
LCLK
t1
t4
t5
t3
t2
MEC1322
TABLE 38-6: LPC CLOCK TIMING PARAMETERS
Name
Description
MIN TYP
MAX
Units
t1 Period
30
57
nsec
(Note 38-
7)
t2 High Time
11
t3 Low Time
t4 Rise Time
3
t5 Fall Time
Note 38-7 The standard clock frequency supported is 33MHz (max 33.3ns period). Setting the Handshake bit
in the Host Interface allows the LPC interface to support a PCI clock rate from 19.2MHz to 33MHz.
38.5 LPC RESET# Timing
FIGURE 38-7:
RESET TIMING
LR ES ET #
t1
TABLE 38-7: RESET TIMING PARAMETERS
Name
Description
t1
LRESET# width
MIN TYP MAX
1
Units
ms
38.5.1 LPC BUS TIMING
FIGURE 38-8:
OUTPUT TIMING MEASUREMENT CONDITIONS, LPC SIGNALS
LCLK
Output Delay
Tri-State Output
t1
t2
t3
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DS00001719D-page 401