NXP Semiconductors MC9S08GT32ACFDE

Overview

MC9S08GT32ACFDE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 core microcontroller with 32 KB on-chip Flash, 2 KB RAM, and integrated peripherals including SCI, SPI, I²C, TPM timers, ADC, and keyboard interrupt module. It operates at up to 40 MHz bus frequency using internal or external clock sources and targets cost-sensitive embedded control applications such as motor control, appliance interfaces, and industrial sensors.

For engineers reviewing the MC9S08GT32ACFDE datasheet, MC9S08GT32ACFDE pinout, MC9S08GT32ACFDE application, or MC9S08GT32ACFDE equivalent, key selection criteria include its QFN-48 package, 32 KB Flash with block protection, 10-bit 16-channel ADC, dual TPM modules supporting PWM and input capture, and support for BDM debug interface - all validated in the MC9S08GB60A/GTxxA family datasheet Rev. 2 (2008).

Technical Context

The MC9S08GT32ACFDE implements the S08CPUV2 core with 16-bit index register, 8-bit accumulator, and condition code register, executing instructions in single-cycle (most) or two-cycle (branch) timing. Its internal clock generator (S08ICGV2) supports multiple modes: FEI (FLL-engaged internal), FBE (FLL-bypassed external), and FEE (FLL-engaged external), enabling flexible clock source selection from 32 kHz crystals to 4 MHz resonators with bus frequencies up to 40 MHz.

Peripheral integration includes two asynchronous serial interfaces (SCI1/SCI2), one synchronous serial interface (SPI), one I²C controller (S08IICV1), two timer/PWM modules (TPM1/TPM2) each with six channels, a 10-bit 16-input ADC (S08ATDV3), and a dedicated keyboard interrupt module (S08KBIV1) with programmable edge/level sensitivity on Port A pins.

Key Specifications

Pinout & Package

MC9S08GT32ACFDE 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 Addendum Rev. 0 (2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08GT32ACFDE, MC9S08AC32CFUE reduces peripheral count and package size at the cost of timer and ADC flexibility, while S9S08SG32E1MTJ extends automotive readiness and protocol support without altering core instruction compatibility.

Availability

MC9S08GT32ACFDE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, automotive body electronics, and consumer remote control hub applications requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08GT32ACFDE 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, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08GT32ACFDE belongs to the HCS08 microcontroller family designed for cost-optimized, low-power embedded control in appliances, industrial equipment, and automotive sub-systems where deterministic real-time response and code density are critical.

FAQ

What is the maximum bus frequency supported by the MC9S08GT32ACFDE?

The MC9S08GT32ACFDE supports a maximum bus frequency of 40 MHz when operating in FEE mode with an external 4 MHz crystal and appropriate FLL configuration. This value is confirmed in the MC9S08GB60A/GTxxA datasheet Rev. 2 (2008), Appendix A Electrical Characteristics, Table A-9. The internal clock generator allows scaling from 32 kHz to 40 MHz depending on mode and external component selection. MC9S08GT32ACFDE maintains timing integrity across all supported modes without requiring external PLL circuitry.

Does the MC9S08GT32ACFDE include hardware debug support?

Yes, the MC9S08GT32ACFDE integrates a single-wire Background Debug Mode (BDM) interface accessible via the PTG0 pin. It supports real-time register inspection, flash programming, breakpoint insertion, and memory read/write operations without halting peripheral operation. This capability is documented in Chapter 15 "Development Support" of the MC9S08GB60A/GTxxA datasheet Rev. 2. MC9S08GT32ACFDE requires no external debug probe beyond standard BDM-compatible programmers like the P&E Multilink.

What ADC resolution and channel count does the MC9S08GT32ACFDE provide?

The MC9S08GT32ACFDE features a 10-bit successive-approximation analog-to-digital converter with 16 selectable input channels mapped to Port B pins. Conversion time is as fast as 3.5 µs per sample under optimal clocking conditions, and the module supports hardware averaging across up to eight samples to improve effective resolution. These specifications are verified in Chapter 14 "Analog-to-Digital Converter (S08ATDV3)" of the MC9S08GB60A/GTxxA datasheet Rev. 2. MC9S08GT32ACFDE delivers consistent linearity and offset performance across its full −40°C to 105°C operating range.

Is the MC9S08GT32ACFDE pin-compatible with other devices in the GTxxA series?

Yes, the MC9S08GT32ACFDE shares identical pinout and package (QFN-48, 98ASA00466D) with MC9S08GT16A, MC9S08GT60A, and MC9S08GB60A within the same family. All share the same mechanical drawing and signal mapping per Chapter 2 "Pins and Connections" of the MC9S08GB60A/GTxxA datasheet Rev. 2. This allows hardware reuse across variants differing only in Flash/RAM size. MC9S08GT32ACFDE retains full functional compatibility with these parts, enabling scalable firmware development and board-level design flexibility.

What low-power modes are available on the MC9S08GT32ACFDE?

The MC9S08GT32ACFDE supports four low-power modes: Run, Wait, Stop1, and Stop3. Stop3 achieves the lowest current consumption (≤1 µA) with BDM disabled and only LVD or RTI capable of wake-up. Each mode preserves different register states and peripheral functionality - for example, ADC and TPM remain active in Wait mode but are halted in Stop modes. These behaviors are defined in Chapter 3 "Modes of Operation" of the MC9S08GB60A/GTxxA datasheet Rev. 2. MC9S08GT32ACFDE enables energy-efficient operation in battery-powered or thermally constrained applications without sacrificing responsiveness.