LPC83X datasheet(67/78 Pages) NXP

67 / 78 page

LPC83x

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Product data sheet

Rev. 1.2 — 4 April 2018

67 of 78

NXP Semiconductors

LPC83x

32-bit ARM Cortex-M0+ microcontroller

14.3 Connecting power, clocks, and debug functions

Figure 41 shows the basic board connections used to power the LPC83x, connect the

external crystal, and provide debug capabilities via the serial wire port.

(1) See Section 14.1 “XTAL input” for the values of C1 and C2.

(2) Position the decoupling capacitors of 0.1 μF and 0.01 μF as close as possible to the VDD pin. Add one set of decoupling

capacitors to each VDD pin.

(3) Position the decoupling capacitors of 0.1 μF as close as possible to the VREFN and VDD pins. The 10 μF bypass capacitor

filters the power line. Tie VREFP to VDD if the ADC is not used. Tie VREFN to VSS 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. 2.

Fig 41. Power, clock, and debug connections

SWDIO/PIO0_2

SWCLK/PIO0_3

RESET/PIO0_5

VSS

PIO0_12

ADC_0

PIO0_8/XTALIN

PIO0_9/XTALOUT

VDD (2 to 5 pins)

VREFP

PIO0_6/ADC_1

VREFN

LPC83x

3.3 V

DGND

Note 4

Note 5

Note 5 (ADC_1)

Note 1

DGND

Note 2

Note 3

0.01 μF

0.1 μF

3.3 V

AGND

10 μF

0.1 μF

ISP select pin

n.c.

SWD connector

3.3 V

~10 kΩ - 100 kΩ

aaa-024109

VSSA

AGND

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