LPC540xx
NXP Semiconductors
32-bit ARM Cortex-M4 microcontroller
10. Static characteristics
10.1 General operating conditions
Table 12. General operating conditions
Tamb = 40 C to +105 C, unless otherwise specified.
Symbol
Parameter
Conditions
Min
-
Typ[1]
Max
180
180
Unit
MHz
MHz
fclk
CPU clock frequency
CPU clock frequency
-
-
For USB high-speed device and
host operations
60
CPU clock frequency
For USB full-speed device and host
operations
12
-
180
MHz
VDD
supply voltage (core
and external rail)
1.71
2.7
-
-
-
-
-
-
3.6
3.6
V
V
V
V
V
V
[2]
For OTP programming only
For USB operation only
3.0
3.6
VDDA
VBAT
Vrefp
analog supply voltage
battery supply voltage
1.71
1.71
2.0
3.6
3.6
ADC positive reference VDDA 2 V
VDDA
voltage
VDDA < 2 V
VDDA
-
VDDA
V
RTC oscillator pins
Vi(rtcx) 32.768 kHz oscillator
on pin RTCXIN
-0.5
-0.5
-
-
+3.6
+3.6
V
V
input voltage
Vo(rtcx)
32.768 kHz oscillator
output voltage
on pin RTCXOUT
Vi(xtal)
crystal input voltage
crystal output voltage
on pin XTALIN
0.5
0.5
-
-
1.95
1.95
V
V
Vo(xtal)
on pin XTALOUT
[1] Typical ratings are not guaranteed. The values listed are for room temperature (25 C), nominal supply voltages.
[2] Attempting to program below 2.7 V will result in unpredictable results and the part might enter an unrecoverable state.
10.2 CoreMark data
Table 13. CoreMark score
Tamb = 25C, VDD = 3.3V
Parameter
ARM Cortex-M4 in active mode
CoreMark score CoreMark code executed from SRAMX;
Conditions
Typical
Unit
[1][3][4][5]
[1][3][4][5]
[2][3][4][5]
CCLK = 12 MHz
CCLK = 96 MHz
CCLK = 180 MHz
3.38
3.38
3.38
(Iterations/s) / MHz
(Iterations/s) / MHz
(Iterations/s) / MHz
[1] Clock source FRO. PLL disabled.
[2] Clock source 12 MHz FRO. PLL enabled.
[3] Characterized through bench measurements using typical samples.
[4] Compiler settings: IAR C/C++ Compiler for Arm ver 8.22.2, optimization level 3, optimized for time on.
[5] SRAM1, SRAM2, SRAM3, and USB SRAM powered down. SRAM0 and SRAMX powered.
LPC540xx
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© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 1.8 — 22 June 2018
88 of 168
NXP [ NXP ]
