ST STM8L - Figure 8. Output Characteristics; Figure 9. Input Characteristics; Input Characteristics; Output Characteristics

DocID16139 Rev 5 15/42
AN3029 Reset control
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5.1.1 Output characteristics
• A valid pulse on the pin is guaranteed with a ≥ 20 ns pulse duration on the internal
output buffer.
• After a valid pulse is recognized, a pulse on the pin of at least 20 µs is guaranteed
starting from the falling edge of A.
Figure 8. Output characteristics
5.1.2 Input characteristics
• All pulses with a duration less than 50 ns are filtered
• All train/burst spikes with a ratio of 1/10 must be filtered. This means that a negative
spike of up to 50 ns is always filtered, when a 5 ns interval between spikes occurs (ratio
1/10).
• All pulses with duration more than 300 ns are recognized as valid pulses
Figure 9. Input characteristics
MS32525V1
≥ 20 n
20 μs pulse stretch min
A
Pad
Reset requested
MS32526V1
Pad
System rese
t
>5 ns >5 ns
<50 ns <50 ns <50 ns
300 ns
Valid Reset requestedNegative train of glitch filtered