LPC540xx
NXP Semiconductors
32-bit ARM Cortex-M4 microcontroller
Table 4.
Symbol
Pin description …continued
Description
USB1_AVDDC3V3 E1 G3 24
USB1_AVDDTX3V3 E2 H1 25
10
11
13
12
14
USB1 analog 3.3 V supply.
USB1 analog 3.3 V supply for line drivers.
I/O USB1 bidirectional D+ line.
I/O USB1 bidirectional D- line.
USB1 analog ground for line drivers.
I/O USB0 bidirectional D+ line.
I/O USB0 bidirectional D- line.
[6]
[6]
USB1_DP
USB1_DM
F2 H3 27
E3 H2 26
USB1_AVSSTX3V3 G1 J1
28
[6]
[6]
[5]
USB0_DP
USB0_DM
RESETN
B3 E5 204 97
B2 D5 205 98
J8
N13 101 48
External reset input: A LOW on this pin resets the device,
causing I/O ports and peripherals to take on their default
states, and the boot code to execute. Wakes up the part
from deep power-down mode.
VDD
D5; E6; 1;
1;
-
-
Single 1.71 V to 3.6 V power supply powers internal digital
functions and I/Os.
D7; E8; 48; 21;
E4; F5; 65; 33;
E6; G5; 104; 50;
F5; J12; 108; 54;
F7; L6; 156; 75;
G4; L11 157; 76;
G6
206 99
VSS
D4; B3; 2;
2;
-
-
Ground.
D6; D7; 49; 22;
E5; D8; 66; 34;
E7; E11; 103; 49;
F4; H5; 107; 53;
F6; J5; 148; 71;
G5; K7 162; 79;
G7
J4
-
201 96
VDDA
N6 64
N4 59
32
-
-
-
-
-
Analog supply voltage.
VREFN
ADC negative reference voltage. On TFBGA100 and
LQFP100 packages, the ADC negative reference voltage is
internally tied to the VSSA pin.
VREFP
VSSA
K4 P6 63
H4 L5 60
31
30
-
-
-
-
ADC positive reference voltage.
Analog ground. On TFBGA100 and LQFP100 packages,
the ADC negative reference voltage is internally tied to the
VSSA pin.
[7]
[7]
XTALIN
XTALOUT
VBAT
H2 K4 41
G3 J4 40
K9 N11 94
20
19
45
-
-
-
-
-
-
Main oscillator input.
Main oscillator output.
Battery supply voltage. If no battery is used, tie VBAT to
VDD or to ground.
RTCXIN
J9
L12 105 51
-
-
-
-
RTC oscillator input.
RTC oscillator output.
RTCXOUT
H9 K11 106 52
LPC540xx
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© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 1.8 — 22 June 2018
53 of 168
NXP [ NXP ]
