NXP Semiconductors LPC1110FD20,529

Overview

LPC1110FD20,529 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in SO20 package, delivering up to 50 MHz CPU operation, 4 kB flash, 1 kB SRAM, and integrated peripherals including UART, I²C-bus, SPI, 10-bit ADC (5-channel), and four general-purpose timers - designed for cost-sensitive embedded control in metering, lighting, and alarm systems.

For engineers reviewing the LPC1110FD20,529 datasheet, LPC1110FD20,529 pinout, LPC1110FD20,529 application, or LPC1110FD20,529 equivalent, key selection considerations include its SO20 footprint, 16 GPIO pins, single UART with RS-485 support, power profile capability, and compatibility with NXP's LPCXpresso development ecosystem.

Technical Context

The LPC1110FD20,529 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD) interface, enabling deterministic real-time execution and streamlined firmware debugging. It uses a 12 MHz internal RC oscillator trimmed to ±1 % accuracy as default system clock, optionally augmented by external crystal (1–25 MHz) or PLL for full-speed operation.

Its peripheral set is optimized for minimal-pin-count applications: one Fast-mode I²C-bus interface (not Fast-mode Plus), one UART with fractional baud rate generation and RS-485 support, one SPI controller, and a 10-bit ADC with multiplexed inputs across five pins - all mapped to its 20-lead SO20 package with no exposed thermal pad.

Key Specifications

Pinout & Package

Package: SO20 - plastic small outline package, 20 leads, 7.5 mm body width, standard gull-wing lead form factor compatible with wave and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LPC1110FD20,529, LPC1111FDH20/002 offers double flash/SRAM for incremental firmware growth, while LPC1112FD20/102 adds safety-critical windowed WDT and expanded power management - both retain full pin compatibility and require no PCB revision.

Availability

LPC1110FD20,529 is available at Aetrix Electronics and suitable for smart energy metering, LED lighting control, and security alarm systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for LPC1110FD20,529 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with headquarters in Eindhoven, Netherlands.

The LPC1100 series was designed specifically for cost-sensitive 8/16-bit MCU replacement in industrial control, consumer appliances, and metering - emphasizing low power, small footprint, and toolchain compatibility with ARM Keil and GCC ecosystems.

FAQ

What is the maximum operating frequency of the LPC1110FD20,529?

The LPC1110FD20,529 operates at a maximum CPU frequency of 50 MHz when driven by its internal PLL, which can be clocked from either the 12 MHz internal RC oscillator or an external crystal. This frequency enables real-time response in time-critical tasks such as UART-based RS-485 communication or ADC sampling at sub-millisecond intervals - all while maintaining deterministic interrupt latency typical of the ARM Cortex-M0 architecture.

Does the LPC1110FD20,529 support in-application programming (IAP)?

Yes, the LPC1110FD20,529 supports In-Application Programming via its on-chip bootloader, allowing firmware updates while the device remains operational. This capability is implemented through dedicated ROM-based IAP routines accessible via API calls, enabling secure field upgrades in deployed systems like smart meters or alarm panels without requiring physical access or external programmers - a key advantage over mask-ROM alternatives.

How many ADC channels does the LPC1110FD20,529 provide, and what is their resolution?

The LPC1110FD20,529 integrates a 10-bit successive approximation register (SAR) ADC with five input channels (AD0–AD4), mapped to pins PIO0_11, PIO1_0, PIO1_1, PIO1_2, and PIO1_3. Its 10-bit resolution delivers 1,024 discrete levels across the VDD reference range, sufficient for precision tasks such as temperature monitoring in white goods or light-level sensing in adaptive LED drivers - all without external ADC components.

Is the LPC1110FD20,529 pin-compatible with other LPC111x SO20 variants?

Yes, the LPC1110FD20,529 shares identical pinout and package dimensions with other SO20 variants in the LPC111x family, including LPC1111FDH20/002 and LPC1112FD20/102. This allows direct substitution during prototyping or production ramp - though firmware must be validated for differences in flash size, SRAM, and enabled features (e.g., power profiles or windowed WDT) present in higher-tier variants.

What debug interface does the LPC1110FD20,529 use, and how many pins are required?

The LPC1110FD20,529 uses Serial Wire Debug (SWD), a 2-pin ARM-standard debug interface requiring only SWCLK (PIO0_10) and SWDIO (PIO1_3) pins. This minimal pin count preserves GPIO resources while enabling full debug capabilities - including breakpoints, register inspection, and memory read/write - via widely supported tools like LPC-Link2, SEGGER J-Link, or CMSIS-DAP compliant debuggers.