Datasheet

LPC15XX All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 19 February 2014 70 of 99
NXP Semiconductors
LPC15xx
32-bit ARM Cortex-M3 microcontroller
[2] Typical ratings are not guaranteed. The values listed are for room temperature (25 C), nominal supply
voltages.
12.3 Internal oscillators
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Typical ratings are not guaranteed. The values listed are for room temperature (25 C), nominal supply
voltages.
Fig 33. External clock timing (with an amplitude of at least V
i(RMS)
= 200 mV)
W
&+&/
W
&/&;
W
&+&;
7
F\FON
W
&/&+
W
&+&/
W
&/&;
W
&+&;
7
F\FON
W
&/&+
W
&+&/
W
&/&;
W
&+&;
7
F\FON
W
&/&+
W
&+&/
W
&/&;
W
&+&;
7
F\FON
W
&/&+
DDD
Table 16. Dynamic characteristics: IRC
T
amb
=  40  C to +105  C; 2.7 V  V
DD
 3.6 V
[1]
.
Symbol Parameter Conditions Min Typ
[2]
Max Unit
f
osc(RC)
internal RC
oscillator frequency
25 C  T
amb
 +85 C 12 - 1% 12 12 + 1 % MHz
40 C  T
amb
< 25 C 12 - 2% 12 12 + 1 % MHz
85 C < T
amb
 105 C 12 - 1.5 % 12 12 + 1.5 % MHz
Conditions: Frequency values are typical values. 12 MHz  1 % accuracy is guaranteed for
2.7 V  V
DD
 3.6 V and T
amb
= 25 C to +85 C. Variations between parts may cause the IRC to
fall outside the 12 MHz  1 % accuracy specification for voltages below 2.7 V.
Fig 34. Typical Internal RC oscillator frequency versus temperature
aaa-011233
-40 -10 20 50 80 110
11.85
11.9
11.95
12
12.05
12.1
12.15
temperature (°C)
f
osc(RC)osc(RC)
f
osc(RC)
(MHz)(MHz)(MHz)
3.6 V
3.3 V
3.0 V
2.7 V