lpc1778 NXP Semiconductors, lpc1778 Datasheet - Page 86

• Manufacturer Part Number: lpc1778
• Description: 32-bit Arm Cortex-m3 Microcontroller; Up To 512 Kb Flash And 96 Kb Sram; Usb Device/host/otg; Ethernet; Lcd; Emc
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC178x_7x
Objective data sheet
11.4 Internal oscillators
Table 16.
T
[1]
[2]
Symbol
f
f
osc(RC)
i(RTC)
amb
Fig 19. External clock timing (with an amplitude of at least V
Fig 20. Internal RC oscillator frequency versus temperature
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.
=
−
(X)
40
X
Conditions: Frequency values are typical values. 12 MHz ± 1 % accuracy is guaranteed for
2.7 V ≤ V
to fall outside the 12 MHz ± 1 % accuracy specification for voltages below 2.7 V.
X
X
X
X
X
X
°
Dynamic characteristic: internal oscillators
C to +85
X
Parameter
internal RC oscillator
frequency
RTC input frequency
All information provided in this document is subject to legal disclaimers.
DD(3V3)
°
C; 2.7 V
≤ 3.6 V and T
Rev. 00.04 — 8 July 2010
X
≤
V
DD(3V3)
t
CHCL
amb
<tbd>
= −40 °C to +85 °C. Variations between parts may cause the IRC
≤
3.6 V.
Conditions
-
-
t
CLCX
X
[1]
32-bit ARM Cortex-M3 microcontroller
T
cy(clk)
Min
11.88
-
t
CLCH
t
CHCX
i(RMS)
X
LPC178x/7x
= 200 mV)
X (X)
12
Typ
32.768 -
002aaa907
001aac984
© NXP B.V. 2010. All rights reserved.
[2]
Max
12.12
X
86 of 112
Unit
MHz
kHz