EM6325
Timing Waveforms
tSEN
VDD
VHYS
VTH
Overdrive
0.8V
t
logic "1"
MR
tPMD
logic "0"
t
logic "1"
RESET
tPOR
tMD
tP
logic "0"
t
logic "1"
RESET
tPOR
logic "0"
t
Note 6: tSEN = Maximum Transient Duration. Please refer to figure on the next page.
Note 7: Overdrive = VTH -VDD. Please refer to figure on the next page.
Manual Reset Input
A logic low on MR asserts a reset. Reset remains asserted while MR is low, and for tPOR (200ms nominal for EM6325C) after
it returns high. MR has an internal 15kΩ pull-up resistor, so it can be left open if unused. This input can be driven with
CMOS logic levels or with open-drain outputs. Connect a normally open momentary switch from MR to VSS to create a
manual-reset function; debounce circuitry is integrated. If MR is driven from long cable or the device is used in a noisy
environment, connect a 0.1μF capacitor from MR to VSS to provide additional noise immunity (stronger external additional
pull-up resistor can also be added).
5
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