SPNS176
–
SEPTEMBER 2011
4.8
Glitch Filters
A glitch filter is present on the following signals.
Table 4-20. Glitch Filter Timing Specifications
Pin
nPORRST
tf(nPORRST)
Parameter
Filter time nPORRST pin;
pulses less than MIN will be filtered out, pulses greater than
MAX will generate a reset
(1)
nRST
tf(nRST)
Filter time nRST pin;
pulses less than MIN will be filtered out, pulses greater than
MAX will generate a reset
TEST
tf(TEST)
Filter time TEST pin;
pulses less than MIN will be filtered out, pulses greater than
MAX will pass through
500
2000
ns
500
2000
ns
MIN
500
MAX
2000
Unit
ns
(1)
The glitch filter design on the nPORRST signal is designed such that no size pulse will reset any part of the microcontroller (flash pump,
I/O pins, etc.) without also generating a valid reset signal to the CPU.
PRODUCT PREVIEW
64
System Information and Electrical Specifications
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