LPC1857_53 NXP Semiconductors, LPC1857_53 Datasheet - Page 96
LPC1857_53
Manufacturer Part Number
LPC1857_53
Description
The LPC1857/53 are ARM Cortex-M3 based microcontrollers for embedded applications
Manufacturer
NXP Semiconductors
Datasheet
1.LPC1853FBD208.pdf
(131 pages)
- Current page: 96 of 131
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NXP Semiconductors
LPC1857_53
Objective data sheet
11.3 Crystal oscillator
11.4 IRC and RTC oscillators
Table 11.
T
[1]
[2]
[3]
[4]
[5]
[6]
Table 12.
T
[1]
[2]
Symbol
f
f
Symbol
Low-frequency mode (1-20 MHz)
t
High-frequency mode (20 - 25 MHz)
t
osc(RC)
i(RTC)
amb
amb
jit(per)
jit(per)
Parameters are valid over operating temperature range unless otherwise specified.
Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
Indicates RMS period jitter.
PLL-induced jitter is not included.
Select HF = 0 in the XTAL_OSC_CTRL register.
Select HF = 1 in the XTAL_OSC_CTRL register.
Parameters are valid over operating temperature range unless otherwise specified.
Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
=
=
40
40
Parameter
internal RC oscillator
frequency
RTC input frequency
Dynamic characteristic: oscillator
Dynamic characteristic: IRC and RTC oscillators
C to +85
C to +85
Parameter
period jitter time
period jitter time
All information provided in this document is subject to legal disclaimers.
C; V
C; <tbd>
Rev. 1 — 14 December 2011
DD(IO)
over specified ranges.
V
Conditions
5 MHz crystal
10 MHz crystal
15 MHz crystal
20 MHz crystal
25 MHz crystal
DD(IO)
[5]
[6]
Conditions
-
-
<tbd>.
[1]
32-bit ARM Cortex-M3 microcontroller
[3][4]
[3][4]
[1]
Min
-
-
-
-
-
Min
11.88
-
Typ
13.2
4.3
6.6
4.8
3.7
LPC1857/53
Typ
12.00
32.768
[2]
[2]
© NXP B.V. 2011. All rights reserved.
Max
-
-
-
-
-
Max
12.12
-
96 of 131
Unit
ps
ps
ps
ps
ps
Unit
MHz
kHz
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