NXP Semiconductors MC9S08QG8CFFER

Overview

MC9S08QG8CFFER from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 20-MHz CPU, 8 KB flash memory, 512 bytes RAM, and integrated peripherals including 10-bit ADC, SCI, SPI, I²C, TPM, and ACMP. It operates across industrial temperature range (–40°C to +105°C) in a 16-pin QFN package with exposed thermal pad, targeting cost-sensitive embedded control in space-constrained applications such as motor drive feedback and sensor interface modules.

For engineers reviewing the MC9S08QG8CFFER datasheet, MC9S08QG8CFFER pinout, MC9S08QG8CFFER application, or MC9S08QG8CFFER equivalent, key selection criteria include its single-wire background debug interface, internal clock source with FLL and ±2% frequency stability over voltage/temperature, 12 GPIOs with configurable pullups/slew rate, and FLASH block protection for secure firmware updates.

Technical Context

The MC9S08QG8CFFER implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and hardware-triggered ADC conversions via RTI. Its debug module includes two comparators, nine trigger modes, and an eight-deep FIFO for change-of-flow tracing during in-circuit debugging.

Power management integrates Wait mode plus three Stop modes (Stop1–Stop3), with COP watchdog optionally clocked by dedicated 1-kHz internal source. The ICS module provides bus frequencies from 1 MHz to 10 MHz using FLL locked to internal or external reference, trimmed to ±0.2% resolution at room temperature.

Key Specifications

Pinout & Package

MC9S08QG8CFFER is housed in a 16-pin QFN package (case outline 98ASA00671D) with 0.5 mm pitch and thermally enhanced exposed pad. Pin assignments are validated per Freescale DS rev. 5 (Nov 2009) and QFN Addendum rev. 0 (Jul 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG8CFFER, MC9S08QG8CDTE trades thermal efficiency for easier assembly, while S9S08QG8E2MTJR offers identical functionality under NXP's product stewardship-making it the preferred path for lifecycle continuity without design revision.

Availability

MC9S08QG8CFFER is available at Aetrix Electronics and suitable for motor control feedback, sensor signal conditioning, smart power outlets, and consumer appliance UI controllers requiring stable component supply and industrial temperature grade operation.

Supply support for MC9S08QG8CFFER 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 was a leading designer of embedded processors and analog/mixed-signal ICs, acquired by NXP Semiconductors in 2015. Its HCS08 family delivered high integration and low power for cost-sensitive industrial and automotive applications.

The MC9S08QG8 belongs to Freescale's QG-series 8-bit microcontrollers, designed specifically for compact, low-BOM-cost embedded systems needing analog integration, robust debug, and extended temperature reliability without external crystals or regulators.

FAQ

What is the maximum operating frequency of the MC9S08QG8CFFER CPU core?

The MC9S08QG8CFFER features an HCS08 CPU core rated for up to 20 MHz operation. Bus frequency is derived from the internal clock source (ICS) module, which uses a frequency-locked loop (FLL) to generate stable clocks from 1 MHz to 10 MHz across voltage and temperature. The 20-MHz rating refers to core instruction execution speed under optimal conditions, not bus clock frequency.

Does the MC9S08QG8CFFER support in-system programming via its single-wire debug interface?

Yes, the MC9S08QG8CFFER supports full in-system programming and debugging through its BKGD/MS pin using Freescale's single-wire background debug protocol. This enables flash erase, program, and verify operations without removing the device from the PCB, and is compatible with standard tools like the Cyclone Pro and PE Micro interfaces.

What are the supported clock sources for the MC9S08QG8CFFER, and how is the internal reference trimmed?

The MC9S08QG8CFFER supports two primary clock sources: the internal clock source (ICS) with FLL and the external oscillator (XOSC). The ICS uses a factory-trimmed internal reference with ±0.2% resolution at 25°C and ±2% deviation over full temperature and voltage range. Trim values are stored in nonvolatile memory and loaded automatically at reset.

Can the MC9S08QG8CFFER's ADC operate in low-power Stop modes?

Yes, the MC9S08QG8CFFER's 10-bit ADC remains functional in Stop3 mode when configured for hardware triggering via the Real-Time Interrupt (RTI) module. Conversion results are stored in registers accessible after wake-up, enabling ultra-low-power periodic sampling-critical for battery-operated sensor nodes where average current must stay below 5 µA.

Is the MC9S08QG8CFFER pin-compatible with other members of the QG8 family, such as the MC9S08QG8CDTE?

No, the MC9S08QG8CFFER (16-pin QFN) is not pin-compatible with the MC9S08QG8CDTE (16-pin TSSOP), despite identical signal definitions. Their land patterns differ: QFN uses 0.5 mm pitch with exposed thermal pad, while TSSOP uses 0.65 mm pitch and no thermal pad. PCB layout changes are required for substitution.