NXP Semiconductors MC9S08AC8CFGER

Overview

MC9S08AC8CFGER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 B RAM, 40-MHz CPU, and integrated peripherals including dual SCI, SPI, I²C, 8-channel 10-bit ADC, and three 16-bit TPM timer modules. It targets cost-sensitive industrial control and consumer appliance applications requiring reliable on-chip debug and low-power operation.

For engineers reviewing the MC9S08AC8CFGER datasheet, MC9S08AC8CFGER pinout, MC9S08AC8CFGER application, or MC9S08AC8CFGER equivalent, this page delivers verified package mapping (32-pin QFN), validated peripheral specifications, confirmed clock architecture (FLL-based internal generator with crystal/resonator support), and real-world use context for embedded control design.

Technical Context

The MC9S08AC8CFGER implements the HCS08 CPU core with HC08 instruction set extension and BGND instruction, supporting background debugging via a dedicated BKGD/MS pin. Its internal clock generator (ICG) offers multiple modes - FEI, FEE, FBE - enabling flexible clock source selection between internal trimmed RC oscillator and external crystal (32 kHz to 4 MHz) or clock input.

Peripherals are memory-mapped and fully integrated: two SCI modules support asynchronous serial communication with 13-bit break detection; the I²C module operates up to 100 kbps under standard bus loading; and the ADC includes automatic compare function with configurable sample time and reference options (VREFH/VREFL).

Key Specifications

Pinout & Package

MC9S08AC8CFGER is housed in a 32-pin QFN package (98ASA00473D) with exposed thermal pad, copper-wire bonding, and 0.5 mm pitch. The package supports automated optical inspection and high-density PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC8CFGER, MC9S08QG8CDTE offers reduced code space and no dual SCI/I²C, limiting protocol flexibility; S9KEAZ8AMTJ provides modern ARM tooling and richer analog integration but requires firmware rewrite and layout revision.

Availability

MC9S08AC8CFGER is available at Aetrix Electronics and suitable for industrial control panels, home appliance mainboards, and smart lighting systems requiring stable component supply and long-term lifecycle assurance.

Supply support for MC9S08AC8CFGER 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 delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications, with deep expertise in microcontrollers and edge processing.

The HCS08 family - including MC9S08AC8CFGER - was designed for cost-optimized, low-power embedded control in appliances, power tools, and sensor interfaces where deterministic real-time response and debug reliability are essential.

FAQ

What is the maximum operating frequency of the MC9S08AC8CFGER CPU core?

The MC9S08AC8CFGER CPU core runs at up to 40 MHz, with a corresponding 20-MHz internal bus frequency. This timing is achieved using the on-chip FLL (Frequency-Locked Loop) with either internal trimmed RC or external crystal reference. The MC9S08AC8CFGER maintains consistent instruction execution timing across voltage and temperature ranges per its electrical specifications in Appendix A of the Rev. 9 datasheet.

Does the MC9S08AC8CFGER support in-circuit debugging without additional hardware?

Yes, the MC9S08AC8CFGER supports full in-circuit debugging via its single-pin BKGD/MS interface, eliminating the need for external debug probes or headers. The on-chip debug module includes breakpoint comparators, event-triggered trace capture, and background memory access - all accessible through standard BDM (Background Debug Mode) tools compatible with the MC9S08AC8CFGER's documented protocol.

What package type and pin count does the MC9S08AC8CFGER use?

The MC9S08AC8CFGER uses a 32-pin QFN package (case outline 98ASA00473D) with 0.5 mm pitch and exposed thermal pad. This copper-wire bonded variant replaces earlier gold-wire versions and is documented in Freescale's QFN Addendum Rev. 0 (July 2014). The pinout matches the MC9S08GT16A 32-QFN variant per the shared device family mechanical drawings.

Can the MC9S08AC8CFGER operate from a 32 kHz watch crystal?

Yes, the MC9S08AC8CFGER supports 32 kHz crystals via its XTAL/EXTAL pins and can configure its internal clock generator (ICG) to use this source for low-power real-time interrupt (RTI) or COP operation. The ICG's FLL can also multiply this reference to generate higher bus frequencies - for example, achieving 4.19 MHz bus speed directly from 32 kHz, as validated in Example #1 of the Rev. 9 datasheet.

How much flash memory and RAM does the MC9S08AC8CFGER include?

The MC9S08AC8CFGER integrates 8 KB of on-chip FLASH memory and 512 bytes of RAM. Both are accessed via the same unified memory map used by the HCS08 CPU. The FLASH supports in-application programming, block protection, and security features - all confirmed in Section 4.4 of the MC9S08AC16 Series Data Sheet Rev. 9, which explicitly covers the MC9S08AC8CFGER as a member of that series.