NXP Semiconductors MC9S08AW48CFUE

Overview

MC9S08AW48CFUE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 48 KB flash, 1.5 KB RAM, 48-pin QFN package, and integrated peripherals including dual SCI, SPI, I²C, 16-channel 10-bit ADC, and dual TPM modules - deployed in automotive body control modules and industrial sensor interfaces.

For engineers reviewing the MC9S08AW48CFUE datasheet, MC9S08AW48CFUE pinout, MC9S08AW48CFUE application, or MC9S08AW48CFUE equivalent, key selection criteria include its 20 MHz bus frequency, copper-wire QFN-48 package (98ASA00466D), on-chip BDM debug interface, and support for stop2/stop3 low-power modes in battery-constrained embedded systems.

Technical Context

The MC9S08AW48CFUE implements the S08CPUV2 core with 40-MHz CPU clock capability and 20-MHz internal bus frequency, using a Harvard architecture with separate instruction and data buses. It integrates an Internal Clock Generator (ICGV4) supporting multiple clock modes - FEI, FEE, FBE - with NVM-trimmed internal reference and external crystal/resonator options.

Its peripheral set includes two serial communications interfaces (SCI) with 13-bit break support, one SPI module, one I²C bus controller (up to 100 kbps), and two timer/pulse-width modulator (TPM) modules: one 2-channel and one 6-channel 16-bit unit, each configurable for input capture, output compare, edge-aligned or buffered centered PWM.

Key Specifications

Pinout & Package

MC9S08AW48CFUE is housed in a 48-pin QFN package (exposed pad), case outline 98ASA00466D, with copper wire bonding per Freescale QFN migration addendum (Rev. 0, 07/2014). The package supports thermal dissipation via the exposed die pad and requires soldering per EB806 recommendations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AW48CFUE, MC9S08AW60CFUE delivers 12 KB more flash in identical packaging for incremental firmware growth, while S9KEAZN64ACLH represents a platform shift to ARM with greater compute headroom but necessitates layout and software rework.

Availability

MC9S08AW48CFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control boards, and portable medical diagnostics requiring stable component supply across extended product lifecycles.

Supply support for MC9S08AW48CFUE 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, formed from the acquisition of Freescale Semiconductor in 2015.

The HCS08 family - including MC9S08AW48CFUE - was designed for cost-sensitive, reliability-critical embedded control in harsh environments, emphasizing low-power operation, robust debug capability, and analog/mixed-signal integration.

FAQ

What is the maximum bus frequency supported by the MC9S08AW48CFUE?

The MC9S08AW48CFUE supports a maximum internal bus frequency of 20 MHz, derived from its 40-MHz HCS08 CPU clock through a configurable prescaler. This frequency is maintained across all operating modes except Stop2 and Stop3, where clocks are gated to minimize power consumption. The bus speed directly governs peripheral timing, including ADC conversion rate and SCI baud generation.

Does the MC9S08AW48CFUE include hardware debug capability?

Yes, the MC9S08AW48CFUE integrates a single-wire background debug mode (BDM) interface via the BKGD/MS pin, enabling non-intrusive in-circuit debugging without dedicated JTAG pins. It supports breakpoint setting, real-time instruction trace via on-chip bus capture buffer, and memory read/write access - all compliant with Freescale's BDM specification and supported by Codewarrior development tools.

What package type and dimensions does the MC9S08AW48CFUE use?

The MC9S08AW48CFUE uses a 48-pin QFN package with exposed thermal pad, case outline number 98ASA00466D per Freescale's QFN migration addendum (Rev. 0, 07/2014). It replaces the earlier gold-wire variant (98ARL10606D) with copper wire bonding and conforms to JEDEC MO-220 standards. Footprint and thermal pad layout must follow EB806 guidelines for optimal solder joint reliability and heat dissipation.

Can the MC9S08AW48CFUE operate from an internal clock source only?

Yes, the MC9S08AW48CFUE can operate using only its internally generated clock via the Internal Clock Generator (ICGV4) in Self-Clocked Mode (SCM) or FLL Engaged Internal (FEI) mode. The internal reference is NVM-trimmed for ±2% accuracy at 25°C, enabling crystal-free operation in cost-sensitive applications such as consumer controls or disposable medical devices where external timing components are undesirable.

How many ADC channels does the MC9S08AW48CFUE support, and what is their resolution?

The MC9S08AW48CFUE supports up to 16 single-ended or 8 differential analog input channels through its 10-bit successive approximation ADC. Conversion results are stored in 16-bit registers, and the module includes an automatic compare function that triggers interrupts or DMA requests upon threshold crossing - essential for responsive sensor monitoring in real-time control loops.