LPC1114FHI33 Datasheet, PDF (102/543 Pages) NXP Semiconductors – LPC111x/LPC11Cxx User manual

UM10398
Chapter 8: LPC1100XL series: I/O configuration (IOCONFIG)
Rev. 12.1 — 7 August 2013
User manual
8.1 How to read this chapter
Remark: This chapter applies to parts in the following series (see Table 1):
• LPC1100XL
The implementation of the I/O configuration registers varies for different LPC1100XL parts
and packages. Table 105 shows which IOCON registers are used on the different
packages.
8.2 Features
The I/O configuration registers control the electrical characteristics of the pads. The
following features are programmable:
• Pin function.
• Internal pull-up/pull-down resistor or bus keeper function.
• Hysteresis.
• Analog input or digital mode for pads hosting the ADC inputs.
• I²C mode for pads hosting the I²C-bus function.
• Pseudo open-drain mode for non-I2C pins.
8.3 General description
The IOCON registers control the function (GPIO or peripheral function), the input mode,
and the hysteresis of all PIOn_m pins. In addition, the I²C-bus pins can be configured for
different I²C-bus modes. An analog input mode can be selected for the input pins to the
ADC.
UM10398
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 12.1 — 7 August 2013
© NXP B.V. 2013. All rights reserved.
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