NXP Semiconductors MC9S08AW16CPUE

Overview

MC9S08AW16CPUE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU core, 16 KB on-chip FLASH memory, and 1 KB RAM. It integrates dual SCI, SPI, I²C, 16-channel 10-bit ADC, two 16-bit TPM timer/PWM modules, and keyboard interrupt support - deployed in automotive body control modules, industrial sensor nodes, and smart appliance controllers.

For engineers reviewing the MC9S08AW16CPUE datasheet, MC9S08AW16CPUE pinout, MC9S08AW16CPUE application, or MC9S08AW16CPUE equivalent, key selection criteria include QFN-48 package compatibility, single-wire BDM debug interface, COP watchdog with LVD reset/interrupt, and peripheral mix supporting real-time motor control and serial sensor interfacing.

Technical Context

The MC9S08AW16CPUE implements the S08CPUV2 core with HC08 instruction set extension (including BGND), operating at up to 40 MHz CPU frequency and 20 MHz bus frequency. Its internal clock generator supports FLL-engaged modes (FEI/FEE) with NVM-trimmed precision, enabling stable operation from 32 kHz crystal or internal RC source.

Peripherals are organized around two independent 16-bit timer/pulse-width modulator (TPM) modules: one with 2 channels, one with 6 channels - each supporting input capture, output compare, edge-aligned PWM, and buffered centered PWM (CPWM). The ADC includes automatic compare and temperature sensor integration.

Key Specifications

Pinout & Package

MC9S08AW16CPUE is housed in a 48-pin low-profile quad flat no-lead (QFN) package with exposed thermal pad, compliant with JEDEC MO-220 and IPC-7351 standards. Pin assignments follow Freescale's documented 98ASA00466D mechanical drawing (copper-wire migration revision).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AW16CPUE, MC9S08AC16CPUE offers smaller footprint but sacrifices KBI, I²C, and second SCI - limiting human-interface and multi-sensor designs; S9KEAZ128AMLH delivers architectural upgrade path with CAN and higher precision peripherals, at cost of toolchain migration and power optimization effort.

Availability

MC9S08AW16CPUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart appliance motor control requiring stable component supply across extended product lifecycles.

Supply support for MC9S08AW16CPUE 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) was a leading designer of embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The HCS08 family - including MC9S08AW16CPUE - was engineered for cost-sensitive, real-time control applications demanding robust debug, mixed-signal integration, and long-term automotive qualification.

FAQ

What is the maximum bus frequency supported by the MC9S08AW16CPUE?

The MC9S08AW16CPUE supports a maximum bus frequency of 20 MHz. This is derived from its internal clock generator architecture, where the 40-MHz CPU core runs at twice the bus speed. The 20 MHz bus frequency ensures deterministic timing for peripheral access and interrupt latency in real-time control applications such as motor PWM generation and sensor sampling.

Does the MC9S08AW16CPUE include an on-chip temperature sensor?

Yes, the MC9S08AW16CPUE integrates an on-chip temperature sensor connected to the 10-bit ADC. This sensor is explicitly documented in the MC9S08AW60 data sheet (Rev 2, December 2006), which covers MC9S08AW16 devices. It enables system-level thermal monitoring without external components, with typical accuracy calibrated via NVM trimming in the internal clock generator.

What debug interface does the MC9S08AW16CPUE use?

The MC9S08AW16CPUE uses a single-wire background debug mode (BDM) interface via the BKGD/MS pin. This interface supports in-circuit programming, breakpoint setting (one active breakpoint plus two more in the on-chip debug module), and real-time emulation - eliminating the need for multi-pin JTAG headers and simplifying PCB layout for space-constrained designs.

Is the MC9S08AW16CPUE pin-compatible with other AW-series MCUs like MC9S08AW60?

No, the MC9S08AW16CPUE is not pin-compatible with MC9S08AW60. While both share the same 48-pin QFN package option, their pin assignments differ significantly - particularly for peripheral multiplexing (e.g., SCI, TPM, KBI signals) and power/ground distribution. The MC9S08AW60 data sheet explicitly lists distinct pinouts per device variant, confirming that pin mapping is not interchangeable across AW-series memory variants.

What clock sources are supported by the MC9S08AW16CPUE?

The MC9S08AW16CPUE supports multiple clock sources: external crystal or resonator (via XTAL/EXTAL), external clock input, and internally generated clock with NVM-trimmed RC oscillator. Its internal clock generator (ICG) provides FLL-engaged modes (FEI/FEE) for stable frequency synthesis - enabling reliable operation from low-cost 32 kHz crystals or unregulated 4–8 MHz sources without external PLL components.