LPC5411x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet Rev. 2.1 — 9 May 2018 88 of 105
NXP Semiconductors
LPC5411x
32-bit ARM Cortex-M4/M0+ microcontroller
13.3 Connecting power, clocks, and debug functions
(1) See Section 13.5 “RTC oscillator” for the values of C3 and C4.
(2) Position the decoupling capacitors of 0.1 μF and 0.01 μF as close as possible to the V
DD
pin. Add one set of decoupling
capacitors to each V
DD
pin.
(3) Position the decoupling capacitors of 0.1 μF as close as possible to the VREFN and V
DDA
pins. The 10 μF bypass capacitor
filters the power line. Tie V
DDA
and VREFP to V
DD
if the ADC is not used. Tie VREFN to V
SS
if ADC is not used.
(4) Uses the ARM 10-pin interface for SWD.
(5) When measuring signals of low frequency, use a low-pass filter to remove noise and to improve ADC performance. Also see
Ref. 1
.
(6) External pull-up resistors on SWDIO and SWCLK pins are optional because these pins have an internal pull-up enabled by
default.
Fig 32. Power, clock, and debug connections
SWDIO/PIO0_17
SWCLK/PIO0_16
RESETN
V
SS
V
SSA
PIO0_31
ADCx
RTCXIN
RTCXOUT
V
DD
(2 to 4 pins)
V
DDA
VREFP
VREFN
LPC5411x
3.3 V
3.3 V
DGND
DGND
AGND
1
3
5
7
9
2
4
6
8
10
(4)
(5)
DGND
DGND
DGND
C3
C4
(1)
(2)
(3)
(3)
0.01 μF
0.1 μF
3.3 V
DGND
10 μF
0.1 μF
3.3 V
AGND
AGND
AGND
10 μF
0.1 μF
0.1 μF
ISP select pins
n.c.
n.c.
n.c.
SWD connector
aaa-022103
PIO0_4
PIO1_6
3.3 V
~10 kΩ - 100 kΩ
3.3 V
~10 kΩ - 100 kΩ
(6)
(6)
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