NXP Semiconductors LPC1102UK,118

Overview

LPC1102UK,118 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in WLCSP16 package, operating up to 50 MHz with 32 kB flash, 8 kB SRAM, one RS-485 UART, one SPI with SSP features, four counter/timers, and a 10-bit 5-channel ADC. It targets cost-sensitive embedded control in portable and consumer devices requiring low power and compact footprint.

For engineers reviewing the LPC1102UK,118 datasheet, LPC1102UK,118 pinout, LPC1102UK,118 application, or LPC1102UK,118 equivalent, key selection considerations include its 11 GPIO pins with interrupt capability, 5 V-tolerant I/O configuration, fractional baud rate UART for RS-485, and Deep-sleep wake-up via six dedicated start logic pins - all critical for battery-powered sensor nodes and compact peripheral controllers.

Technical Context

The LPC1102UK,118 implements an ARM Cortex-M0 core with integrated NVIC supporting 19 vectored interrupts and four programmable priority levels. Its clock system combines a 12 MHz ±1 % internal RC oscillator (IRC), a programmable watchdog oscillator (9.4 kHz–2.3 MHz), and a PLL enabling CPU operation up to 50 MHz without external crystal dependency.

Peripheral integration includes accelerated AHB-based GPIO (full-port write in one instruction), a 10-bit ADC with burst mode and pin-triggered conversion, and SPI with 8-frame FIFOs and 4–16-bit frame support - all mapped through the IOCONFIG block for flexible pin multiplexing across 11 digital I/O terminals.

Key Specifications

Pinout & Package

Package: WLCSP16 (wafer-level chip-scale package), 2.17 × 2.32 × 0.6 mm, 16-bump array with 0.4 mm pitch - designed for ultra-compact PCB layouts in space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1114FHN33/102 and STM32F030F4P6, the LPC1102UK,118 uniquely combines WLCSP16 packaging, RS-485 UART, 5-channel ADC, and Deep-sleep wake-up on six GPIOs - making it the only option meeting strict size, interface, and power constraints for miniaturized industrial and consumer edge nodes.

Availability

LPC1102UK,118 is available at Aetrix Electronics and suitable for smart lighting control, industrial sensor nodes, USB-to-RS-485 adapters, and consumer remote control hubs requiring stable component supply across high-mix, low-volume production runs.

Supply support for LPC1102UK,118 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in ARM-based microcontrollers and mixed-signal integration.

The LPC1100 series, including LPC1102UK,118, was designed specifically for cost-sensitive, space-constrained embedded systems needing ARM Cortex-M0 performance, low-power operation, and essential peripherals - targeting portable electronics and industrial edge devices.

FAQ

What is the maximum operating frequency of the LPC1102UK,118?

The LPC1102UK,118 operates at a maximum CPU frequency of 50 MHz. This is achieved using the on-chip PLL driven by either the 12 MHz internal RC oscillator or an external clock source. The PLL output is divided to ensure stable operation below 100 MHz, and the system clock must be configured via software after reset to enable full-speed execution. The LPC1102UK,118 maintains this frequency across its specified voltage (1.8–3.6 V) and temperature range.

Does the LPC1102UK,118 support In-System Programming (ISP) without a debugger?

Yes, the LPC1102UK,118 supports UART-based In-System Programming (ISP) using its built-in bootloader. Unprogrammed parts automatically enter ISP mode on power-up, and user code can invoke ISP functionality via UART commands. No JTAG or SWD debugger is required for field firmware updates. The LPC1102UK,118 uses PIO0_0 as the primary reset pin and does not require a dedicated ISP entry pin - simplifying production programming and field maintenance workflows.

How many analog inputs does the LPC1102UK,118 ADC support, and what is its resolution?

The LPC1102UK,118 integrates a single 10-bit successive approximation ADC with input multiplexing across five pins (AD0–AD4). It achieves a minimum conversion time of 2.44 µs (≥400 kSamples/s) and supports burst mode, pin-triggered conversion, and individual result registers per channel. The ADC reference is tied to VDD (3.3 V), providing a 0–3.3 V measurement range. The LPC1102UK,118 does not include DAC or comparator functions.

Can the LPC1102UK,118 wake up from Deep-sleep mode using GPIO interrupts?

Yes, the LPC1102UK,118 supports wake-up from Deep-sleep mode via six dedicated start logic GPIO pins: PIO0_0, PIO0_1, PIO0_6, PIO0_8, PIO0_9, and PIO1_3. These pins connect directly to the NVIC and generate interrupts that resume CPU execution without requiring external circuitry. The LPC1102UK,118 must be configured to use the IRC oscillator before entering Deep-sleep, and wake-up latency is under 10 µs - enabling responsive event-driven operation in battery-powered applications.

Is the LPC1102UK,118 pin-compatible with the LPC1104UK variant?

No, the LPC1102UK,118 is not pin-compatible with the LPC1104UK. While both share the WLCSP16 package and most pin assignments, the LPC1104UK adds CLKOUT and CT32B0_MAT2 functionality on PIO0_1, and moves SCK0 to A1 (vs. A2 on LPC1102UK). The LPC1102UK,118 lacks these functions entirely, and its pinout reflects the original revision - meaning PCBs designed for LPC1104UK cannot accommodate LPC1102UK,118 without layout modification.