EA-XPR-003 Embedded Artists, EA-XPR-003 Datasheet - Page 70

• Manufacturer Part Number: EA-XPR-003
• Description: BOARD LPCXPRESSO LPC1768
• Manufacturer: Embedded Artists
• Series: LPCXpressor
• Type: MCUr

Specifications of EA-XPR-003

• Contents: Board, Software
• For Use With/related Products: EA-XPR-021, ARM Cortex-M3
• For Use With: EA-XPR-021 - BOARD BASE LPCXPRESSO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
LPC1769_68_67_66_65_64_63
Product data sheet
14.4 Standard I/O pin configuration
order to keep the noise coupled in via the PCB as small as possible. Also parasitics
should stay as small as possible. Values of C
accordingly to the increase in parasitics of the PCB layout.
Figure 35
The default configuration for standard I/O pins is input with pull-up enabled. The weak
MOS devices provide a drive capability equivalent to pull-up and pull-down resistors.
Fig 35. Standard I/O pin configuration with analog input
•
•
•
•
•
as digital output
as analog input
as digital input
pin configured
pin configured
pin configured
Digital output driver: Open-drain mode enabled/disabled
Digital input: Pull-up enabled/disabled
Digital input: Pull-down enabled/disabled
Digital input: Repeater mode enabled/disabled
Analog input
driver
shows the possible pin modes for standard I/O pins with analog input function:
All information provided in this document is subject to legal disclaimers.
open-drain enable
repeater mode
output enable
analog input
Rev. 6.01 — 11 March 2011
data output
data input
enable
LPC1769/68/67/66/65/64/63
pull-down enable
pull-up enable
select analog input
x1
and C
32-bit ARM Cortex-M3 microcontroller
x2
should be chosen smaller
V
V
DD
DD
strong
pull-up
strong
pull-down
weak
pull-up
weak
pull-down
© NXP B.V. 2011. All rights reserved.
V
ESD
DD
ESD
V
SS
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PIN