MEC1404 Datasheet, PDF (506/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 43-3: VBAT THRESHOLDS AND VBAT_POR
Parameters
VBAT Power On Reset Threshold
VBAT Rise Time (Off to VBAT
=V_Threshold)
Symbol
V_TH
V_Rise
MIN
TYP
MAX
1.125
1.25
1.375
100
Units
V
s
Notes
Note 43-1
Note 43-1 VBAT is monitored on two events: coin cell insertion and VTRGD assertion. If VBAT is below VTH
when VTRGD is asserted a VBAT_POR is generated.
43.1.4 VCC_PWRGD TIMING
VCC_PWRGD
t_VPGPW
FIGURE 43-1:
VCC_PWRGD TIMING DIAGRAM
TABLE 43-4: VCC_PWRGD INPUT TIMING
PARAMETERS
VCC_PWRGD Pulse Width
SYMBOL
t_VPGPW
MIN TYP MAX
31
–
–
UNITS
ns
43.2 Clocking AC Timing Characteristics
FIGURE 43-2:
CLOCK TIMING DIAGRAM
High
Time
Fall Time
Low
Time
Rise Time
NOTES
t_SU
DS00001956D-page 506
t_ADJ
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