NXP Semiconductors MC9S08AW48CPUE

Overview

MC9S08AW48CPUE from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 48 KB flash, 1.5 KB RAM, 48-pin QFN package, 20 MHz bus frequency, and integrated peripherals including dual SCI, SPI, I²C, 16-channel 10-bit ADC, and dual TPM timer/PWM modules. It targets automotive body control modules requiring robust debug support and low-voltage operation.

For engineers reviewing the MC9S08AW48CPUE datasheet, MC9S08AW48CPUE pinout, MC9S08AW48CPUE application, or MC9S08AW48CPUE equivalent, key selection criteria include on-chip COP watchdog, background debug interface (BDM), copper-wire QFN package compatibility, and support for stop-mode LVD interrupt - all confirmed in Freescale's official MC9S08AW60/AW48/AW32/AW16 datasheet Rev 2 (Dec 2006) and QFN Addendum Rev 0 (Jul 2014).

Technical Context

The MC9S08AW48CPUE implements the S08CPUV2 core with HC08 instruction set extension and BGND instruction, operating at up to 40 MHz CPU clock and 20 MHz internal bus frequency. Its internal clock generator (S08ICGV4) supports multiple modes - FEI, FEE, FBE - with NVM-trimmed precision and external crystal/resonator or clock input options.

Peripherals are tightly coupled to the bus architecture: dual SCI modules support 13-bit break detection; I²C operates up to 100 kbps under full bus loading; TPM modules provide configurable input capture, output compare, edge-aligned and centered PWM on all channels; and the 16-channel ADC includes automatic compare function and integrated temperature sensor.

Key Specifications

Pinout & Package

MC9S08AW48CPUE uses a 48-pin QFN package (case outline 98ASA00466D), measuring 7 mm × 7 mm × 1 mm with 0.5 mm pitch and exposed thermal pad. Pin assignments follow Freescale's standardized HCS08 AW-series layout, supporting shared functions across ports A–G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AW48CPUE, MC9S08AW60CPUE offers direct pin- and code-compatible upgrade path with increased memory, while S9KEAZ128AMLH provides architectural modernization at the cost of toolchain migration and PCB redesign.

Availability

MC9S08AW48CPUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart lighting controllers, and appliance motor interfaces requiring stable component supply across extended temperature ranges (–40°C to +105°C) and long lifecycle support.

Supply support for MC9S08AW48CPUE 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

Freescale Semiconductor (now part of NXP Semiconductors since 2015) was a leading designer of embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S08AW series belongs to Freescale's HCS08 microcontroller family, engineered for cost-sensitive, high-reliability automotive body electronics and industrial control applications requiring robust debug, low-power operation, and ASIL-B-capable peripherals.

FAQ

What is the package type and thermal pad configuration of the MC9S08AW48CPUE?

The MC9S08AW48CPUE uses a 48-pin QFN package (case outline 98ASA00466D) with an exposed thermal pad. This copper-wire-bonded package measures 7 mm × 7 mm × 1 mm, features 0.5 mm pitch, and requires soldering the thermal pad to a PCB copper pour for optimal thermal dissipation and EMI reduction - per Freescale EB806 application note.

Does the MC9S08AW48CPUE support in-circuit debugging, and what interface does it use?

Yes, the MC9S08AW48CPUE supports real-time in-circuit debugging via its single-wire background debug mode (BDM) interface on the BKGD/MS pin. This allows breakpoint setting, memory inspection, and register read/write without halting system clocks - essential for validating timing-critical automotive firmware during development and field diagnostics.

What are the supported clock sources for the MC9S08AW48CPUE, and how is accuracy maintained?

The MC9S08AW48CPUE supports crystal, resonator, external clock, or internally generated clock with NVM-trimmed precision. The internal clock generator (ICG) uses factory-trimmed values stored in nonvolatile memory to calibrate the FLL loop, achieving ±2% bus frequency accuracy over temperature and voltage - sufficient for LIN and basic CAN timing without external crystal.

How many interrupt sources does the MC9S08AW48CPUE support, and what priority mechanism is used?

The MC9S08AW48CPUE supports up to 32 interrupt/reset sources, managed through a fixed-priority vector table with 32 entries. Priority is determined by vector address order (lower address = higher priority), and each source has individual enable/disable control in the IRQSC and peripheral-specific registers - enabling deterministic response for time-critical events like ADC conversion complete or TPM overflow.

Is the MC9S08AW48CPUE pin-compatible with other devices in the AW family, and which ones?

Yes, the MC9S08AW48CPUE is pin-compatible with MC9S08AW60CPUE, MC9S08AW32CPUE, and MC9S08AW16CPUE in the 48-pin QFN package (98ASA00466D). All share identical pin assignments, electrical characteristics, and peripheral mapping - allowing hardware reuse across memory variants while scaling firmware requirements.