NXP Semiconductors MC9S08AW16CFGER

Overview

MC9S08AW16CFGER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB on-chip FLASH, 1 KB RAM, and a 20 MHz bus frequency. It integrates dual SCI, SPI, I²C, 16-channel 10-bit ADC, two 16-bit TPM modules (2- and 6-channel), KBI, and single-wire BDM for in-circuit debugging - deployed in automotive body control modules and industrial sensor nodes.

For engineers reviewing the MC9S08AW16CFGER datasheet, MC9S08AW16CFGER pinout, MC9S08AW16CFGER application, or MC9S08AW16CFGER equivalent, key selection criteria include QFN-48 package compatibility, 16 KB FLASH with block protection, 10-bit ADC accuracy under 1 LSB INL, COP watchdog timing tolerance, and BDM debug interface voltage level (3.3 V tolerant).

Technical Context

The MC9S08AW16CFGER implements the S08CPUV2 core with HC08 instruction set extension (including BGND), executing at up to 40 MHz CPU clock derived from internal or external sources. Its Internal Clock Generator (ICGV4) supports FEI, FEE, FBE, and SCM modes with NVM-trimmed RC oscillator and optional crystal/resonator input (32 kHz–4 MHz).

Peripherals are memory-mapped and synchronized to the 20 MHz bus clock: the 16-bit TPM modules support input capture, output compare, edge-aligned PWM, and buffered centered PWM; the ADC includes auto-compare and temperature sensor integration; and the dual SCI modules support 13-bit break detection and LIN-compatible framing.

Key Specifications

Pinout & Package

MC9S08AW16CFGER is housed in a 48-pin low-profile quad flat no-lead (QFN) package per document 98ASA00466D, featuring an exposed thermal pad for enhanced thermal dissipation in compact automotive and industrial PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZ128AMLH and MC9RS08LA8, the MC9S08AW16CFGER delivers optimal balance of legacy code compatibility, integrated analog/peripheral density, and QFN-48 packaging - making it ideal for cost-sensitive, space-constrained 8-bit upgrades without architectural overhaul.

Availability

MC9S08AW16CFGER is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor control, and medical handheld devices requiring stable component supply across extended production lifecycles.

Supply support for MC9S08AW16CFGER 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 spin-off and acquisition of Freescale Semiconductor in 2015.

The HCS08 family, including MC9S08AW16CFGER, was designed for cost-sensitive, reliability-critical embedded control in harsh environments - emphasizing robust debug, flash security, and mixed-signal integration without external support components.

FAQ

What is the maximum bus frequency supported by the MC9S08AW16CFGER?

The MC9S08AW16CFGER supports a maximum bus frequency of 20 MHz. This value is fixed by the internal clock generator architecture and directly governs peripheral timing, interrupt latency, and ADC conversion speed. The CPU core can operate at up to 40 MHz, but all on-chip peripherals-including TPM, SCI, and ADC-are synchronized to the bus clock. This 20 MHz limit ensures deterministic timing behavior across temperature and voltage ranges specified in the electrical characteristics table.

Does the MC9S08AW16CFGER include an integrated temperature sensor?

Yes, the MC9S08AW16CFGER includes an integrated temperature sensor connected to the 10-bit ADC. It is accessible via dedicated ADC channel ADP9 and calibrated in production to provide ±3°C accuracy across –40°C to +105°C. The sensor output is ratiometric to VDDAD, so stable analog supply and proper ADC reference configuration (VREFH/VREFL) are required for accurate readings. This feature eliminates external sensor components in thermal monitoring applications.

What debug interface does the MC9S08AW16CFGER use, and what hardware is required?

The MC9S08AW16CFGER uses a single-wire Background Debug Mode (BDM) interface via the BKGD/MS pin. It requires a compatible BDM pod (e.g., P&E Micro's Cyclone or USB-ML-12) and CodeWarrior Development Studio v6.3 or later. No external pullups or level shifters are needed - the BKGD/MS pin has an internal pullup and is 3.3 V tolerant. Real-time in-circuit emulation (ICE) with trigger-based bus capture is supported, enabling trace of ~50 instructions before/after a breakpoint.

Can the MC9S08AW16CFGER operate from a 3.3 V supply, and are its I/Os 5 V tolerant?

The MC9S08AW16CFGER operates from 2.7 V to 5.5 V, so 3.3 V is fully supported and commonly used. However, its GPIOs are *not* 5 V tolerant - they are CMOS inputs with VIH ≥ 0.7 × VDD and VIL ≤ 0.3 × VDD. Driving the MCU with 5 V logic levels risks latch-up or damage unless level-shifting circuitry is used. For mixed-voltage systems, external translators or resistive dividers are required on any 5 V signal lines connected to MC9S08AW16CFGER pins.

What is the FLASH endurance and data retention specification for the MC9S08AW16CFGER?

The MC9S08AW16CFGER FLASH memory is rated for 100,000 program/erase cycles per block and guarantees data retention of 20 years at 85°C or 100 years at 25°C. These values are validated per JEDEC JESD22-A117 and apply to the entire 16 KB array. Block protection settings prevent accidental erasure, and the flash command interface includes status checking (FSTAT register) to confirm successful writes before proceeding - essential for robust firmware update routines in the MC9S08AW16CFGER.