NXP Semiconductors MC9S08QG4MPAE

Overview

MC9S08QG4MPAE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 20-MHz CPU, 4 KB on-chip FLASH, 256 bytes RAM, and integrated peripherals including 8-channel 10-bit ADC, SCI, SPI, I²C, TPM, ACMP, and MTIM - deployed in cost-sensitive embedded control applications such as small-appliance motor control and sensor interface modules.

For engineers reviewing the MC9S08QG4MPAE datasheet, MC9S08QG4MPAE pinout, MC9S08QG4MPAE application, or MC9S08QG4MPAE equivalent, key selection considerations include its 16-pin QFN package with exposed pad, internal clock source (ICS) supporting 1–10 MHz bus frequencies, single-wire background debug interface, low-voltage detection with interrupt/reset, and FLASH block protection for firmware security in production environments.

Technical Context

The MC9S08QG4MPAE implements the S08CPUV2 core with HC08 instruction set extension (including BGND), supports up to 32 interrupt/reset sources, and integrates an on-chip debug module with two comparators, nine trigger modes, and eight-deep FIFO for change-of-flow tracing. Its ICS module uses a frequency-locked loop (FLL) with factory-trimmed internal reference enabling ±0.2% resolution and ±2% deviation over voltage/temperature.

Peripherals are tightly coupled to the CPU via a unified memory map: ADC supports hardware triggering via RTI, ACMP output can route to TPM for event synchronization, and TPM channels support edge-aligned or center-aligned PWM generation. The device operates across industrial temperature range (−40°C to +105°C) with supply voltage of 2.7–5.5 V and includes COP watchdog with selectable 1-kHz or bus-clock source.

Key Specifications

Pinout & Package

MC9S08QG4MPAE is housed in a 16-pin QFN package (3 × 3 mm body, 0.5 mm pitch) with exposed thermal pad (EPAD) connected to VSS for enhanced thermal performance and EMI reduction. Pin assignment conforms to Freescale's 98ASA00671D mechanical drawing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG4MPAE, MC9S08QG8MPAE offers immediate scalability within the same footprint and toolchain, while S9KEAZ128AMLH demands hardware and software rework but delivers significantly higher throughput and memory headroom for next-generation designs.

Availability

MC9S08QG4MPAE is available at Aetrix Electronics and suitable for small-appliance motor control, industrial sensor interface, smart power outlet, and LED lighting dimmer applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for MC9S08QG4MPAE 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) is a global leader in embedded processing solutions, specializing in automotive, industrial, and consumer microcontrollers with emphasis on reliability and system-level integration.

The MC9S08QG4MPAE belongs to the HCS08 family - designed for cost-sensitive, low-power embedded control applications where small footprint, integrated analog peripherals, and debug simplicity are critical design priorities.

FAQ

What is the maximum operating frequency of the MC9S08QG4MPAE CPU core?

The MC9S08QG4MPAE features the HCS08 S08CPUV2 core with a maximum operating frequency of 20 MHz. This frequency is achieved using the internal clock source (ICS) with FLL enabled and properly configured, or via external crystal/ceramic resonator input through the XOSC module. The actual bus frequency depends on ICS configuration but supports up to 10 MHz for reliable peripheral operation under full voltage and temperature range.

Does the MC9S08QG4MPAE support in-circuit debugging, and what interface is used?

Yes, the MC9S08QG4MPAE supports in-circuit debugging via a single-wire background debug interface using the BKGD/MS pin. This interface enables real-time bus capture, breakpoint setting (one active plus two in debug module), and on-chip emulation without requiring a dedicated JTAG header. The debug module includes two comparators and nine trigger modes, allowing precise program flow analysis during development and validation of MC9S08QG4MPAE-based systems.

What analog peripherals are integrated into the MC9S08QG4MPAE?

The MC9S08QG4MPAE integrates an 8-channel, 10-bit successive approximation register (SAR) ADC with internal bandgap reference, temperature sensor channel, and automatic compare function; plus an analog comparator (ACMP) module with internal reference option and output routable to TPM for event synchronization. Both modules operate independently of CPU execution and support hardware triggering - for example, the ADC can be triggered by the RTI counter to enable deterministic sampling intervals without software intervention.

What power-saving modes does the MC9S08QG4MPAE support, and how do they affect peripheral operation?

The MC9S08QG4MPAE supports Wait mode plus three Stop modes (Stop1, Stop2, Stop3). In Wait mode, the CPU halts but peripherals remain active. In Stop3, the ICS is disabled and only RTI, IRQ, and LVD interrupts can wake the device; ADC and TPM are inactive. Stop2 retains ICS operation but disables most clocks; Stop1 maintains basic clocking for limited wake-up sources. Peripheral behavior in each mode is explicitly defined in the datasheet - for instance, ADC conversions halt in all Stop modes, while TPM continues counting in Wait mode only.

Is the MC9S08QG4MPAE pin-compatible with other members of the QG series, and which packages are supported?

The MC9S08QG4MPAE is pin-compatible with MC9S08QG8MPAE in the 16-pin QFN (3 × 3 mm) package, sharing identical pin assignment and electrical characteristics. It is not pin-compatible with 24-pin QFN or PDIP variants of the QG series. The "MPAE" suffix specifically denotes the 16-pin QFN variant with exposed pad; other suffixes (e.g., "CPBE" for TSSOP or "ACFGE" for DFN) indicate different packages with distinct pinouts. Always verify mechanical drawing 98ASA00671D for MC9S08QG4MPAE layout compliance.