MEC1404 Datasheet, PDF (508/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
Note 43-6
Note 43-7
Firmware can use the INT_32K_RDY status bit listed in the Section 10.0, "Jump Table Vectored
Interrupt Controller (JTVIC)" to indicate when the internal 32k Hz clock has reach operating
frequency.
This timing assumes the oscillator was powered and reach oscillator-lock prior to entering a sleep
state. See also Table 3-12, “System Sleep Control Bit Encoding,” on page 87.
43.3 Generic Strap Option Sampling Timing
TABLE 43-6: GENERIC STRAP OPTION SAMPLING TIMING
PARAMETERS
EC_PROC_RESET#
deasserted to Strap Sampled
SYMBOL
t_SAMPLE
MIN TYP MAX
– 500 600
UNITS
µs
NOTES
43.4 Pin Reset Timing
43.4.1 RESET_IN# TIMING
Note: The GPIO pins will float after the RESET_IN# pin is asserted low in less than 9 usec (max)
FIGURE 43-3:
RESET_IN# TIMING
t_F
t_RESET
t_R
0.8V
VSS
TABLE 43-7: RESETI# TIMING PARAMETERS
LIMITS
SYMBOL
PARAMETER
MIN
MAX
t_F
t_R
t_RESET
RESET_IN# Fall time
RESET_IN# Rise time
Minimum Reset Time
0
10
0
10
1
Note 43-8 The RESET_IN# input can tolerate glitches of no more than 50ns.
43.4.2 RESET_OUT# TIMING
The minimum reset output time is determined by the RESET_IN# pin.
UNITS
s
s
s
COMMENTS
Note 43-8
DS00001956D-page 508
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