NXP Semiconductors LPC1112FHN33/202:5

Overview

LPC1112FHN33/202 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in HVQFN33 package, featuring 16 kB flash, 4 kB SRAM, 28 GPIO pins, 10-bit ADC with 8-channel input multiplexing, and single UART with RS-485 support-designed for cost-sensitive embedded control in lighting and alarm systems.

For engineers reviewing the LPC1112FHN33/202 datasheet, LPC1112FHN33/202 pinout, LPC1112FHN33/202 application, or LPC1112FHN33/202 equivalent, key selection criteria include its LPC1100L-series power profiles, windowed watchdog timer, Fast-mode Plus I²C interface, and compatibility with SWD debug infrastructure in space-constrained designs.

Technical Context

The LPC1112FHN33/202 implements an ARM Cortex-M0 core with NVIC and system tick timer, operating at up to 50 MHz via internal 12 MHz RC oscillator (±1 %) or external crystal (1–25 MHz). It integrates a programmable PLL for CPU clock scaling and supports fractional baud rate generation in its UART.

Its peripheral set includes one Fast-mode Plus I²C-bus interface (1 Mbit/s), one RS-485-capable UART with FIFO, two SPI controllers (SSP features), four general-purpose timers (up to 13 match outputs), and a 10-bit ADC with configurable channel selection across 8 pins-fully enabled in the HVQFN33 package variant.

Key Specifications

Pinout & Package

HVQFN33 package: plastic thermal enhanced very thin quad flat package, no leads, 33 terminals, body size 7 × 7 × 0.85 mm, exposed thermal pad for improved heat dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1112FHN33/202, the /102 variant reduces BOM cost but sacrifices runtime flexibility, while the /202 variant of LPC1113 offers headroom for complex control logic without increasing board area or redesign effort.

Availability

LPC1112FHN33/202 is available at Aetrix Electronics and suitable for smart lighting control, home alarm panels, and e-metering interfaces requiring stable component supply and long-term industrial availability.

Supply support for LPC1112FHN33/202 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The LPC111x series targets cost-sensitive 32-bit embedded applications, delivering ARM Cortex-M0 performance with optimized power efficiency and integrated peripherals for rapid development of sensor nodes and control modules.

FAQ

What is the maximum operating frequency of the LPC1112FHN33/202?

The LPC1112FHN33/202 operates at a maximum CPU frequency of 50 MHz. This speed is achieved using either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) or an external crystal (1–25 MHz) with integrated PLL multiplication. The device maintains full peripheral functionality-including UART, I²C, and ADC-at this clock rate.

Does the LPC1112FHN33/202 support in-system programming (ISP)?

Yes, the LPC1112FHN33/202 supports In-System Programming (ISP) via its built-in bootloader, accessible through UART0 using standard serial commands. This enables firmware updates without removing the device from the PCB, and is fully functional in the LPC1112FHN33/202's HVQFN33 package with no additional hardware required.

How many ADC channels are available on the LPC1112FHN33/202?

The LPC1112FHN33/202 provides a 10-bit ADC with input multiplexing across 8 pins (AD[7:0]), all accessible in the HVQFN33 package. Channel selection is software-configurable, and conversion can be triggered by timer match events or software commands-enabling synchronized sampling in lighting and sensor applications.

Is the LPC1112FHN33/202 pin-compatible with other LPC111x HVQFN33 variants?

Yes, the LPC1112FHN33/202 shares identical pinout and package dimensions with all LPC111x HVQFN33 variants (e.g., LPC1111FHN33/202, LPC1113FHN33/202). Pin functions-including GPIO, UART, I²C, and ADC-are consistent across the family, enabling drop-in replacement within the same series and temperature grade (−40 °C to +85 °C).

What debug interface does the LPC1112FHN33/202 support?

The LPC1112FHN33/202 supports Serial Wire Debug (SWD) via dedicated SWDIO and SWCLK pins (shared with PIO1_3 and PIO0_10), enabling full JTAG-equivalent debugging, flash programming, and real-time tracing using standard ARM-compliant tools like LPC-Link2 or CMSIS-DAP adapters.