NXP Semiconductors LPC1227FBD64/301,1

Overview

LPC1227FBD64/301 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller operating at up to 45 MHz, featuring 128 kB flash, 8 kB SRAM, a 10-bit 8-channel ADC, two analog comparators with programmable output feedback, and dual UARTs with RS-485 and IrDA support - deployed in industrial metering and factory automation systems.

For engineers reviewing the LPC1227FBD64/301 datasheet, LPC1227FBD64/301 pinout, LPC1227FBD64/301 application, or LPC1227FBD64/301 equivalent, key selection criteria include its LQFP64 package with 55 GPIOs, I²C Fast-mode Plus (1 Mbit/s), ROM-based integer division for deterministic arithmetic, and IEC-60335 Class B-certified Windowed Watchdog Timer.

Technical Context

The LPC1227FBD64/301 implements an ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), executing Thumb instructions at up to 45 MHz with one wait state from flash. Its clock system integrates a 1–25 MHz crystal oscillator, 12 MHz ±1 % internal RC oscillator, and PLL for flexible CPU clock derivation.

Digital peripherals include a 21-channel Micro DMA controller, CRC engine, four general-purpose timers (two 32-bit, two 16-bit), and SSP/SPI with FIFO. Analog resources comprise one 10-bit ADC with eight inputs and two comparators supporting timer-triggered outputs and 555-timer emulation via ROSC.

Key Specifications

Pinout & Package

LPC1227FBD64/301 is housed in a 64-pin LQFP package (SOT314-2, 10 × 10 × 1.4 mm) with 55 GPIOs, dedicated debug pins (SWDIO/SWCLK), reset, crystal (XTALIN/XTALOUT), RTC oscillator (RTCXIN/RTCXOUT), and dual supply rails (VDD(3V3), VDD(IO), VSS, VSSIO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1226FBD64/301, the LPC1227FBD64/301 adds 32 kB flash for larger protocol stacks or OTA update partitions; versus LPC11U37FBD64/301, it trades USB for WWDT certification and analog comparator flexibility - critical for metering and alarm systems requiring functional safety and analog event generation.

Availability

LPC1227FBD64/301 is available at Aetrix Electronics and suitable for eMetering, industrial networking, and alarm systems requiring stable component supply across long-life industrial product cycles.

Supply support for LPC1227FBD64/301 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The LPC122x product line was designed for cost-sensitive, safety-aware industrial control applications - emphasizing low-power operation, analog integration, and IEC-60335 compliance in factory and home automation systems.

FAQ

What is the maximum CPU frequency supported by the LPC1227FBD64/301?

The LPC1227FBD64/301 supports a maximum CPU frequency of 45 MHz when operating with one wait state from flash memory. This frequency is achievable using the integrated PLL driven by either the 1–25 MHz crystal oscillator or the 12 MHz internal RC oscillator. The device achieves a CoreMark score of over 45 (1.51/MHz), confirming deterministic real-time performance suitable for industrial control loops.

Does the LPC1227FBD64/301 include hardware-accelerated division?

Yes, the LPC1227FBD64/301 includes a ROM-based 32-bit integer division library optimized for the ARM Cortex-M0 core. This hardware-assisted routine delivers several times higher arithmetic performance than software-based implementations, with highly deterministic cycle timing and reduced flash code size - critical for time-sensitive metering calculations and control algorithms in the LPC1227FBD64/301.

How many GPIO pins does the LPC1227FBD64/301 provide in its LQFP64 package?

The LPC1227FBD64/301 provides 55 General Purpose I/O pins in its LQFP64 package. These are distributed across Port 0 (32 pins), Port 1 (7 pins), and Port 2 (16 pins), with all pins supporting programmable pull-up resistors, open-drain mode, digital input glitch filtering, and edge/level-sensitive interrupt generation - enabling direct interfacing with sensors, actuators, and industrial buses without external logic.

Is the LPC1227FBD64/301 certified for functional safety standards?

Yes, the Windowed Watchdog Timer (WWDT) in the LPC1227FBD64/301 is certified to IEC-60335 Class B, making it suitable for safety-critical applications such as white goods and alarm systems. This certification validates the WWDT's ability to detect and recover from software faults under defined failure conditions. The LPC1227FBD64/301 itself is not ASIL-rated, but its WWDT meets household appliance safety requirements per IEC-60335.

What analog peripherals are integrated into the LPC1227FBD64/301?

The LPC1227FBD64/301 integrates an 8-channel 10-bit ADC and two highly flexible analog comparators. Each comparator supports multiple inputs (ACMP0_I0–I3, ACMP1_I0–I3) and outputs (ACMP0_O, ACMP1_O) that can trigger timer match signals or emulate 555 timer behavior using the Relaxation Oscillator (ROSC) on PIO0_29. These peripherals enable standalone analog event detection and sensor conditioning without external components in the LPC1227FBD64/301.