NXP Semiconductors MC9S08QE32CLCR

Overview

MC9S08QE32CLCR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB flash, 2 KB RAM, and integrated peripherals including 12-bit ADC, dual analog comparators, two SCI modules, I²C, SPI, three TPM timer/PWM modules, RTC, and single-wire background debug interface. It operates from 1.8 V to 3.6 V across –40 °C to +85 °C and targets low-power industrial control and sensor interface applications.

For engineers reviewing the MC9S08QE32CLCR datasheet, MC9S08QE32CLCR pinout, MC9S08QE32CLCR application, or MC9S08QE32CLCR equivalent, key selection considerations include its 32-pin QFN (5 mm × 5 mm) package, stop3 mode wakeup time of 6 µs, 12-bit ADC with temperature sensor, internal clock source supporting up to 50.33 MHz, and on-chip security circuitry for flash/RAM protection.

Technical Context

The MC9S08QE32CLCR implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and operating at 50.33 MHz (at 3.6 V), 40 MHz (2.4–2.1 V), or 20 MHz (2.1–1.8 V). Its internal clock source (ICS) uses a frequency-locked loop (FLL) with factory-trimmed internal reference enabling ±0.2% resolution and ±2% deviation over voltage and temperature.

System-level features include two very low-power stop modes, reduced-power wait mode, peripheral clock gating via PCE register, and a dedicated 1 kHz low-power oscillator for RTC operation in all modes. The device integrates hardware-based security circuitry to prevent unauthorized access to flash and RAM contents.

Key Specifications

Pinout & Package

MC9S08QE32CLCR is packaged in a 32-pin QFN (Case 1582), 5 mm × 5 mm body, exposed pad, lead-free, RoHS-compliant. Pinout matches the 32-pin LQFP/QFN configuration shown in Figure 4 of Rev. 7 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with S9KEAZN32ACLH, MC9S08QE32CLCR offers deterministic 8-bit real-time response and minimal memory overhead for legacy codebases, while MC9S08AC128CLCR provides direct architectural continuity with expanded resources-both require PCB redesign due to non-identical pinouts and thermal profiles.

Availability

MC9S08QE32CLCR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, medical patient monitor modules, and automotive body control subsystems requiring stable component supply, long-term lifecycle support, and qualified automotive-grade sourcing.

Supply support for MC9S08QE32CLCR 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 formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08QE32CLCR belongs to the HCS08-based QE series designed specifically for cost-sensitive, low-power embedded control applications where deterministic real-time behavior, small code size, and robust peripheral integration are critical.

FAQ

What is the maximum operating frequency of the MC9S08QE32CLCR and under what voltage conditions?

The MC9S08QE32CLCR achieves a maximum CPU frequency of 50.33 MHz at 3.6 V supply voltage, 40 MHz between 2.4 V and 2.1 V, and 20 MHz between 2.1 V and 1.8 V, all across the full temperature range of –40 °C to +85 °C. This voltage-dependent scaling is implemented in hardware and requires no software configuration.

Does the MC9S08QE32CLCR support in-system programming and debug via a single pin?

Yes, the MC9S08QE32CLCR supports single-wire background debug (BDC) through the PTA4/BKGD/MS pin, enabling full in-circuit programming, breakpoint setting, and real-time register inspection without requiring a dedicated JTAG interface. The on-chip debug module includes three comparators and nine trigger modes for advanced trace capabilities.

What are the key low-power features of the MC9S08QE32CLCR relevant to battery-operated devices?

The MC9S08QE32CLCR includes two very low-power stop modes, a reduced-power wait mode, and peripheral clock gating via the PCE register. Its stop3 mode retains RAM and register context with only 6 µs wakeup latency, and the integrated 1 kHz low-power oscillator enables RTC operation without external components-critical for extending battery life in intermittent-sampling applications.

Can the MC9S08QE32CLCR's ADC operate during low-power stop modes?

Yes, the 12-bit ADC in the MC9S08QE32CLCR remains fully functional in stop3 mode, allowing analog measurements to be triggered by external events or internal timers without exiting low-power state. It supports automatic compare, internal bandgap reference, and a built-in temperature sensor (1.7 mV/°C), enabling autonomous sensor monitoring with minimal energy overhead.

How does the MC9S08QE32CLCR handle low-voltage conditions to prevent erratic operation?

The MC9S08QE32CLCR integrates configurable low-voltage detection (LVD) and low-voltage warning (LVW) circuits with selectable trip points: VLVDH (2.11–2.27 V), VLVDL (1.80–1.99 V), and corresponding warning thresholds. These can generate interrupts or force reset, and hysteresis of 80 mV prevents oscillation near threshold-ensuring reliable brownout recovery in automotive and industrial environments.