NXP Semiconductors MC9S08AC32CFGER

Overview

MC9S08AC32CFGER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip FLASH, 2 KB RAM, and a 40-MHz CPU core operating at up to 20-MHz bus frequency. It integrates dual SCI modules supporting LIN 2.0, two SPI, one I²C, 16-channel 10-bit ADC, and six-channel TPM for motor control in automotive body electronics.

For engineers reviewing the MC9S08AC32CFGER datasheet, MC9S08AC32CFGER pinout, MC9S08AC32CFGER application, or MC9S08AC32CFGER equivalent, key selection criteria include QFN-48 package compatibility, on-chip debug support via BKGD/MS pin, COP watchdog with independent 1 kHz clock source, and CRC hardware acceleration for firmware integrity verification.

Technical Context

The MC9S08AC32CFGER implements the S08CPUV2 core with HC08 instruction set extension including BGND, and supports active background debugging via single-wire BKGD interface. Its internal clock generator (ICG) provides precision NVM-trimmed internal reference with crystal/resonator/external clock options.

Peripherals include two SCI modules with master/slave extended break handling for LIN compliance, a 16-bit TPM module configurable for edge-aligned or centered PWM, and a dedicated hardware CRC engine supporting ITU-T polynomial (0x1021) for memory checksums and bootloader validation.

Key Specifications

Pinout & Package

MC9S08AC32CFGER is housed in a 48-pin QFN package (98ASA00466D) with 0.5 mm pitch and exposed thermal pad. The package supports copper wire bonding per Freescale QFN migration addendum Rev. 0 (July 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC32CFGER, S9S08AC32F1MLC trades thermal efficiency for assembly simplicity, while MC9S08AW32CFGE extends analog capability at the cost of increased BOM cost and potential over-specification for basic LIN node roles.

Availability

MC9S08AC32CFGER is available at Aetrix Electronics and suitable for automotive body electronics, LIN network nodes, and embedded motor control applications requiring stable component supply and long-term industrial availability.

Supply support for MC9S08AC32CFGER 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The HCS08 family, including MC9S08AC32CFGER, was designed specifically for cost-sensitive, high-reliability automotive body electronics where LIN compliance, on-chip debug, and robust power management are essential.

FAQ

What is the package type and thermal pad configuration of the MC9S08AC32CFGER?

The MC9S08AC32CFGER uses a 48-pin QFN package (98ASA00466D) with an exposed thermal pad on the bottom surface. This copper pad must be soldered to a large PCB copper pour for effective heat dissipation and electrical grounding, per Freescale EB806 application note. The package supports copper wire bonding and is RoHS-compliant.

Does the MC9S08AC32CFGER support LIN 2.0 communication natively?

Yes, the MC9S08AC32CFGER supports LIN 2.0 natively through its dual SCI modules, which implement master extended break generation and slave extended break detection per SAE J2602. Each SCI can operate independently, enabling one port for LIN cluster communication and another for diagnostics or secondary network bridging.

What debug capabilities does the MC9S08AC32CFGER provide during development?

The MC9S08AC32CFGER includes an on-chip background debug module (BDM) accessible via the BKGD/MS pin. It supports single-wire in-circuit debugging, one hardware breakpoint, two additional breakpoints in the debug module, and an 8-deep FIFO for change-of-flow address logging - all without requiring external JTAG hardware.

How does the MC9S08AC32CFGER handle power supply variations in automotive environments?

The MC9S08AC32CFGER incorporates a programmable Low-Voltage Detect (LVD) system with selectable thresholds (2.5 V, 2.7 V, 3.0 V), capable of generating either an interrupt or reset. Combined with COP watchdog running from an independent 1 kHz internal clock, it ensures fail-safe behavior during battery voltage sags or transients common in 12 V vehicle electrical systems.

Is the MC9S08AC32CFGER pin-compatible with other members of the AC-series microcontrollers?

No - the MC9S08AC32CFGER in QFN-48 is not fully pin-compatible with AC60 or AC48 variants due to differences in peripheral mapping and I/O count. While it shares the same package outline and pin count with MC9S08AC60CFGER, specific signal assignments (e.g., ADC channel availability, TPM channel routing) differ and require schematic review before substitution.