NXP Semiconductors LPC810M021FN8129

Overview

LPC810M021FN8129 from NXP Semiconductors is a 32-bit ARM Cortex-M0+ microcontroller in an 8-pin DIP package, operating up to 30 MHz with 4 kB flash and 1 kB SRAM. It integrates one I²C-bus interface, two USARTs, one SPI controller, one analog comparator, six GPIO pins, and supports low-power Deep power-down mode with wake-up via PIO0_4. It targets cost-sensitive embedded control in lighting and consumer appliances.

For engineers reviewing the LPC810M021FN8129 datasheet, LPC810M021FN8129 pinout, LPC810M021FN8129 application, or LPC810M021FN8129 equivalent, key selection factors include its DIP8 footprint for prototyping, fixed-function pin mapping (RESET, SWDIO, SWCLK, XTALIN/XTALOUT not available), limited peripheral count versus other LPC81xM variants, and reliance on the switch matrix for peripheral routing - all critical for legacy board upgrades and educational use cases.

Technical Context

The LPC810M021FN8129 implements an ARM Cortex-M0+ core with single-cycle I/O access and a 2-stage pipeline, tightly coupled to a Nested Vectored Interrupt Controller (NVIC) supporting up to 8 GPIO-selectable interrupt sources. Its memory subsystem includes 4 kB of on-chip flash (64-byte page erase/write) and 1 kB SRAM, with boot code v13.1 stored in ROM.

Peripheral routing is managed by a hardware switch matrix enabling assignment of movable functions-including U0_TXD/U0_RXD, SPI0_SCK/MOSI/MISO, I2C0_SCL/SDA, and SCTimer inputs/outputs-to any non-power GPIO pin. Fixed functions (RESET, SWDIO, SWCLK, PIO0_4/WAKEUP, PIO0_0–PIO0_5) are physically bound to DIP8 pins 1–8 per Figure 2 and Table 4, with no XTAL or comparator pins exposed in this package.

Key Specifications

Pinout & Package

Package: Plastic dual in-line package (DIP8), 300 mil width, through-hole mounting. Pin pitch 0.1 inch (2.54 mm). RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC810M021FN8129, LPC811M001JDH16 offers expanded memory and I/O at the cost of package compatibility, while STM32F030F4P6 provides higher density in SO8 but lacks the switch matrix's routing agility and NXP's ROM-based driver ecosystem.

Availability

LPC810M021FN8129 is available at Aetrix Electronics and suitable for lighting control, consumer appliance interfaces, and industrial sensor nodes requiring stable component supply across prototyping, pilot production, and long-lifecycle manufacturing.

Supply support for LPC810M021FN8129 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 LPC81xM product line was designed for cost-optimized, low-power 32-bit control in space-constrained applications - delivering ARM Cortex-M0+ performance with flexible peripheral routing and robust power management in legacy-friendly packages.

FAQ

What is the maximum operating frequency of the LPC810M021FN8129?

The LPC810M021FN8129 operates at a maximum CPU frequency of 30 MHz. This is achieved using the internal 12 MHz RC oscillator with PLL multiplication or an external crystal up to 25 MHz. The ARM Cortex-M0+ core executes instructions with a two-stage pipeline, enabling deterministic real-time response critical for timing-sensitive control loops in the LPC810M021FN8129.

Does the LPC810M021FN8129 support external crystal oscillators?

No, the LPC810M021FN8129 in the DIP8 package does not expose XTALIN or XTALOUT pins. Per Figure 2 and Table 4, pins PIO0_8 and PIO0_9 - which serve as XTALIN/XTALOUT in larger packages - are omitted from the DIP8 variant. The LPC810M021FN8129 relies solely on its 12 MHz internal RC oscillator (±1.5 % accuracy) or external clock input via PIO0_1/CLKIN for system timing.

How many GPIO pins are available on the LPC810M021FN8129?

The LPC810M021FN8129 provides six general-purpose I/O pins: PIO0_0, PIO0_1, PIO0_2, PIO0_3, PIO0_4, and PIO0_5. All six are accessible on the DIP8 package (pins 8, 5, 4, 3, 2, and 1 respectively) and support configurable pull-up/pull-down resistors, input inversion, glitch filtering, and 20 mA source capability on four pins. This count is confirmed in Table 2 of the datasheet.

Can the LPC810M021FN8129 be programmed via UART (ISP)?

Yes, the LPC810M021FN8129 supports In-System Programming via UART. With boot code version 13.1 (as indicated by '1A' revision marking), ISP entry is triggered by holding PIO0_1 LOW during reset, using PIO0_0 as U0_RXD and PIO0_4 as U0_TXD. The 8 kB ROM contains the full ISP handler and UART driver API, eliminating the need for external programming hardware beyond a TTL-level UART adapter for the LPC810M021FN8129.

What debug interface does the LPC810M021FN8129 support?

The LPC810M021FN8129 supports Serial Wire Debug (SWD) using dedicated pins SWDIO (PIO0_2) and SWCLK (PIO0_3), both accessible on the DIP8 package. JTAG is not supported in standard operation; TMS and TCK functions appear only during boundary scan mode. SWD enables full debugging - including breakpoints, watchpoints, and memory inspection - with minimal two-wire connection overhead for the LPC810M021FN8129.