Datasheet

LPC84x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet Rev. 1.7 — 27 February 2018 20 of 97
NXP Semiconductors
LPC84x
32-bit Arm Cortex-M0+ microcontroller
8.9.1 Standard I/O pad configuration
Figure 9 shows the possible pin modes for standard I/O pins with analog input function:
• Digital output driver with configurable open-drain output.
• Digital input: Weak pull-up resistor (PMOS device) enabled/disabled.
• Digital input: Weak pull-down resistor (NMOS device) enabled/disabled.
• Digital input: Repeater mode enabled/disabled.
• Digital input: Programmable input digital filter selectable on all pins.
• Analog input: Selected through the switch matrix.
Fig 9. Standard I/O pad configuration
PIN
V
DD
V
DD
ESD
V
SS
ESD
strong
pull-up
strong
pull-down
V
DD
weak
pull-up
weak
pull-down
open-drain enable
output enable
repeater mode
enable
pull-up enable
pull-down enable
select data
inverter
data output
data input
analog input
SWM PINENABLE for
analog input
pin configured
as digital output
driver
pin configured
as digital input
pin configured
as analog input
PROGRAMMABLE
DIGITAL FILTER
aaa-014392