Datasheet

LPC540xx All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet Rev. 1.8 — 22 June 2018 117 of 168
NXP Semiconductors
LPC540xx
32-bit ARM Cortex-M4 microcontroller
11.10 Watchdog oscillator
[1] Typical ratings are not guaranteed. The values listed are at nominal supply voltages.
[2] The typical frequency spread over processing and temperature (T
amb
= 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.
Table 37. Dynamic characteristics: Watchdog oscillator
T
amb
=  40  C to +105  C; 1.71  V
DD
 3.6
[1]
Symbol Parameter Conditions Min Typ
[1]
Max Unit
f
osc(int)
internal watchdog oscillator frequency
[2]
200 - 1500 kHz
D
clkout
clkout duty cycle 48 - 52 %
J
PP-CC
peak-peak period jitter
[3][4]
-1 20ns
t
start
start-up time
[4]
-4 - s