Datasheet
LPC4350_30_20_10 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4.2 — 18 August 2014 107 of 155
NXP Semiconductors
LPC4350/30/20/10
32-bit ARM Cortex-M4/M0 microcontroller
11.3 Crystal oscillator
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
[3] Indicates RMS period jitter.
[4] PLL-induced jitter is not included.
[5] Select HF = 0 in the XTAL_OSC_CTRL register.
[6] Select HF = 1 in the XTAL_OSC_CTRL register.
11.4 IRC oscillator
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
11.5 RTC oscillator
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
Table 15. Dynamic characteristic: oscillator
T
amb
=
40
C to +85
C; V
DD(IO)
over specified ranges; 2.2 V
V
DD(REG)(3V3)
3.6 V.
[1]
Symbol Parameter Conditions Min Typ
[2]
Max Unit
Low-frequency mode (1 MHz - 20 MHz)
[5]
t
jit(per)
period jitter time 5 MHz crystal
[3][4]
- 13.2 - ps
10 MHz crystal - 6.6 - ps
15 MHz crystal - 4.8 - ps
High-frequency mode (20 MHz - 25 MHz)
[6]
t
jit(per)
period jitter time 20 MHz crystal
[3][4]
-4.3- ps
25 MHz crystal - 3.7 - ps
Table 16. Dynamic characteristic: IRC oscillator
T
amb
=
40
C to +85
C; 2.2 V
V
DD(REG)(3V3)
3.6 V.
[1]
Symbol Parameter Conditions Min Typ
[2]
Max Unit
f
osc(RC)
internal RC oscillator
frequency
- 11.82 12.0 12.18 MHz
Table 17. Dynamic characteristic: RTC oscillator
T
amb
=
40
C to +85
C; 2.2 V
V
DD(REG)(3V3)
3.6 V or 2.2 V
V
BAT
3.6 V
[1]
; typical C
RTCX1/2
=
20 pF; also see Section 13.3.
Symbol Parameter Conditions Min Typ
[2]
Max Unit
f
i(RTC)
RTC input frequency - - 32.768 - kHz
I
DD(RTC)
RTC supply current 280 800 nA