LPC540xx
NXP Semiconductors
32-bit ARM Cortex-M4 microcontroller
11.10 Watchdog oscillator
Table 37. Dynamic characteristics: Watchdog oscillator
amb = 40 C to +105 C; 1.71 VDD 3.6[1]
T
Symbol
Parameter
Conditions
Min
200
48
-
Typ[1]
Max
1500
52
Unit
kHz
%
[2]
fosc(int)
Dclkout
JPP-CC
tstart
internal watchdog oscillator frequency
clkout duty cycle
-
-
[3][4]
[4]
peak-peak period jitter
start-up time
1
4
20
ns
-
-
s
[1] Typical ratings are not guaranteed. The values listed are at nominal supply voltages.
[2] The typical frequency spread over processing and temperature (Tamb = 40 C to +105 C) is 40 %.
[3] Actual jitter dependent on amplitude and spectrum of substrate noise.
[4] Guaranteed by design. Not tested in production samples.
LPC540xx
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Product data sheet
Rev. 1.8 — 22 June 2018
117 of 168
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