NXP Semiconductors LPC812M101JD20J

Overview

LPC812M101JD20J from NXP Semiconductors is a 32-bit ARM Cortex-M0+ microcontroller operating at up to 30 MHz, featuring 16 kB flash, 4 kB SRAM, and 18 GPIO pins. It integrates a State Configurable Timer/PWM (SCTimer), multi-rate timer (MRT), self wake-up timer (WKT), CRC engine, and a comparator-designed for compact embedded control in lighting, motor, and climate systems.

For engineers reviewing the LPC812M101JD20J datasheet, LPC812M101JD20J pinout, LPC812M101JD20J application, or LPC812M101JD20J equivalent, key selection criteria include its SO20 package with 20-pin fixed pinout, switch-matrix–configured peripheral routing (USART/I2C/SPI/SCT), 5 V-tolerant GPIO with programmable pull-ups/pull-downs, and Deep power-down wake-up capability via PIO0_4.

Technical Context

The LPC812M101JD20J implements an ARM Cortex-M0+ core with single-cycle I/O, NVIC, and Micro Trace Buffer (MTB) for real-time debug visibility. Its clock system combines a 12 MHz ±1.5 % internal RC oscillator, crystal oscillator (1–25 MHz), PLL, and multiple low-power oscillators-including a 10 kHz WKT source-enabling flexible trade-offs between performance and ultra-low-power operation.

Peripheral routing is managed entirely by the Switch Matrix (SWM), allowing movable functions (e.g., U0_TXD, SPI0_MOSI, CTOUT_0) to be assigned to any of 18 GPIO pins except VDD/VSS. Fixed functions-including RESET, SWDIO, XTALIN/XTALOUT, and true open-drain I2C pins PIO0_10/PIO0_11-are mapped to specific SO20 package pins and retain hardware-level priority over SWM assignments.

Key Specifications

Pinout & Package

Package: SO20 - plastic small outline package, 20 leads, 7.5 mm body width, standard JEDEC MS-013AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC812M101JD20J, the JDH20 offers identical functionality in a smaller footprint but reduced thermal mass, while the LPC824M201JDH20 extends memory and peripheral capacity at the cost of higher BOM cost and larger code footprint-making LPC812M101JD20J optimal for cost-sensitive, thermally stable, fixed-feature embedded controllers.

Availability

LPC812M101JD20J is available at Aetrix Electronics and suitable for lighting control, motor drive interface, and climate sensor hub applications requiring stable component supply, long-term industrial temperature support (−40 °C to +105 °C), and verified SWM-based peripheral flexibility.

Supply support for LPC812M101JD20J 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 markets, with deep expertise in ARM-based microcontrollers and edge processing.

The LPC81xM product line delivers ultra-low-cost, low-power 32-bit control for resource-constrained embedded systems-designed to replace 8/16-bit MCUs while maintaining simple toolchains and minimal memory overhead.

FAQ

What is the maximum operating frequency and core type of the LPC812M101JD20J?

The LPC812M101JD20J features an ARM Cortex-M0+ core rated for up to 30 MHz operation. It uses a two-stage pipeline with single-cycle multiplier and fast single-cycle I/O port access. This frequency is achievable using the internal 12 MHz RC oscillator with PLL multiplication, external crystal (1–25 MHz), or CLKIN signal-verified across the full −40 °C to +105 °C temperature range.

Does the LPC812M101JD20J support in-application programming (IAP) of flash memory?

Yes, the LPC812M101JD20J supports Flash In-Application Programming (IAP) via its on-chip 8 kB ROM API. The ROM includes validated IAP routines that enable firmware updates without external programmer hardware. These routines are accessible through defined vector calls and require no additional bootloader code-confirmed in the LPC81xM User Manual Rev. 4.7.

How many GPIO pins does the LPC812M101JD20J have, and what are their key electrical characteristics?

The LPC812M101JD20J provides 18 general-purpose I/O pins (PIO0_0 to PIO0_17). All are 5 V tolerant in digital mode, support configurable pull-up/pull-down resistors, programmable input glitch filtering, and input inversion. Four pins deliver 20 mA high-current source output; two pins (PIO0_10/PIO0_11) are true open-drain with 20 mA sink capability-required for I2C Fast-mode Plus compliance.

Can the LPC812M101JD20J wake from Deep power-down mode using an external signal?

Yes, the LPC812M101JD20J can wake from Deep power-down mode via a LOW-going pulse ≥50 ns on PIO0_4. This pin must be externally pulled HIGH before entering Deep power-down. Alternatively, wake-up can be triggered by the self wake-up timer (WKT) using its 10 kHz internal oscillator-providing deterministic low-power timing without external components.

What serial communication interfaces are integrated into the LPC812M101JD20J, and how are they assigned to pins?

The LPC812M101JD20J integrates 2 USARTs, 1 I2C-bus interface, and 1 SPI controller. All are movable functions assigned via the Switch Matrix (SWM) to any of the 18 GPIO pins-except I2C0_SCL and I2C0_SDA, which must be assigned to PIO0_10 and PIO0_11 respectively for full I2C Fast-mode Plus compliance per the LPC81xM datasheet Rev. 4.7.