NXP Semiconductors PCF51QU128VHS

Overview

PCF51QU128VHS from NXP Semiconductors (formerly Freescale) is a ColdFire V1-based 32-bit microcontroller with 128 KB flash, operating at up to 50 MHz, supporting industrial control and low-power embedded applications across –40°C to 105°C. It integrates 12-bit ADC/DAC, FlexNVM, Mini-FlexBus, and 10 low-power modes.

For engineers reviewing the PCF51QU128VHS datasheet, PCF51QU128VHS pinout, PCF51QU128VHS application, or PCF51QU128VHS equivalent, key selection criteria include its 1.71–3.6 V supply range, 44-pin Laminate QFN package, integrated hardware CRC, unique 128-bit ID, and support for Smart Card UART and TSI touch sensing.

Technical Context

The PCF51QU128VHS implements a ColdFire V1 core with Dhrystone 2.1 performance of 0.99 DMIPS/MHz from flash and 1.10 DMIPS/MHz from RAM. Its MCG clock system supports three oscillator ranges (1 kHz–32 MHz) and enables dynamic mode switching between RUN, VLPR, STOP, and VLLS power states.

System-level integration includes a four-channel DMA controller, ColdFire DEBUG_Rev_B+ interface with single-wire BDM, and security features such as hardware CRC and chip-unique 128-bit ID. Analog subsystem comprises 12-bit SAR ADC, 12-bit DAC, comparator with 6-bit DAC, and voltage reference - all specified across full temperature and voltage range.

Key Specifications

Pinout & Package

PCF51QU128VHS uses a 44-pin Laminate QFN (5 mm × 5 mm) package with exposed thermal pad. Pin functions are multiplexed across EGPIO, RGPIO, analog, clock, and debug signals - requiring careful configuration via SIM_SOPT registers and pin control registers (PORTx_PCRn).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCF51QU128VHS, KL27Z128VLH4 offers modern ARM toolchain support but omits Smart Card and external bus interfaces, while S32K118LHT0MLF delivers higher performance and automotive certification at the cost of package incompatibility and increased BOM complexity.

Availability

PCF51QU128VHS is available at Aetrix Electronics and suitable for industrial motor control, smart utility metering, automotive body electronics, and IoT edge sensor node applications requiring stable component supply and long-term lifecycle assurance.

Supply support for PCF51QU128VHS 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 roots in Freescale's embedded processor heritage.

The PCF51QU128VHS belongs to the ColdFire Qorivva family, designed specifically for cost-sensitive, low-power, real-time embedded systems requiring mixed-signal integration and extended temperature operation without external support chips.

FAQ

What is the maximum operating frequency of the PCF51QU128VHS core?

The PCF51QU128VHS ColdFire V1 core operates at up to 50 MHz in normal run mode. In Very Low-Power Run (VLPR) mode, the maximum core clock is 2 MHz - a deliberate trade-off to reduce dynamic power while retaining code execution capability. This dual-frequency capability is managed by the Multipurpose Clock Generator (MCG) and is fully documented in Section 5.3 of the PCF51QU128VHS datasheet Rev. 5.

Does the PCF51QU128VHS support in-circuit debugging via standard interfaces?

Yes, the PCF51QU128VHS integrates a ColdFire DEBUG_Rev_B+ interface with single-wire Background Debug Mode (BDM) connection. This allows full JTAG-equivalent debugging - including breakpoint setting, register inspection, and flash programming - using standard Freescale/NXP debug probes like the Multilink Universal. No external debug adapter beyond the BDM header is required for development or production programming of the PCF51QU128VHS.

What analog peripherals are integrated into the PCF51QU128VHS?

The PCF51QU128VHS integrates a 12-bit SAR ADC (16 channels), a 12-bit DAC, an analog comparator (CMP) with integrated 6-bit DAC and programmable reference input, and a precision voltage reference (VREF) module. All analog blocks are specified across the full –40°C to +105°C temperature range and 1.71–3.6 V supply, enabling robust sensor interfacing and closed-loop control without external signal conditioning components in the PCF51QU128VHS design.

How does the PCF51QU128VHS achieve ultra-low power consumption in stop mode?

The PCF51QU128VHS achieves sub-4 μA stop current in VLLS1 mode through dedicated low-leakage circuitry, including the Low-Leakage Wakeup Unit (LLWU), optimized IO retention, and isolated power gating of non-essential domains. At 105°C, VLLS1 current remains below 50 μA - verified per Section 5.2.5 of the PCF51QU128VHS datasheet. This enables years of operation in battery-backed applications such as smart meters and wireless sensors.

Is the PCF51QU128VHS pin-compatible with other members of the MCF51QU family?

No - the PCF51QU128VHS (44-pin Laminate QFN) is not pin-compatible with other MCF51QU variants such as MCF51QU128VLH (64-pin LQFP) or MCF51QU32VFM (32-pin QFN). While they share identical peripheral sets and register maps, package pinouts differ significantly. Migration between variants requires PCB redesign; however, firmware reuse is fully supported due to architectural and memory-map consistency across the MCF51QU family, including the PCF51QU128VHS.