NXP Semiconductors MC9S08GT32CFBER

Overview

MC9S08GT32CFBER from NXP (formerly Freescale) is an 8-bit HCS08 core microcontroller with 32 KB Flash, 2 KB RAM, and integrated peripherals including SCI, SPI, I²C, TPM, ATD, and KBI. It operates at up to 40 MHz bus frequency, supports multiple low-power stop/wait modes, and targets cost-sensitive industrial control and automotive body electronics.

For engineers reviewing the MC9S08GT32CFBER datasheet, MC9S08GT32CFBER pinout, MC9S08GT32CFBER application, or MC9S08GT32CFBER equivalent, key selection criteria include Flash endurance (100k erase/write cycles), on-chip voltage regulator (VDD = 2.7–5.5 V), background debug interface (BDM), and QFP-44 package compatibility with legacy S08 toolchains.

Technical Context

The MC9S08GT32CFBER implements the HCS08 CPU core with 16-bit address space, 8-bit data path, and Harvard architecture instruction fetch. Its Internal Clock Generator (ICG) supports four clock modes: FEI (FLL-engaged internal), FBE (FLL-bypassed external), FEE (FLL-engaged external), and SCM (self-clocked), enabling flexible clock source selection from crystal, resonator, or RC network.

Peripheral integration includes a 10-bit 8-channel ATD converter with 12 µs conversion time, two 16-bit TPM modules supporting input capture, output compare, and edge/center-aligned PWM, and dual serial interfaces (SCI1 + SCI2) with LIN-capable break detection. All modules are memory-mapped and share a common interrupt vector table with 32 priority levels.

Key Specifications

Pinout & Package

MC9S08GT32CFBER is housed in a 44-pin LQFP (7×7 mm, 0.8 mm pitch) package compliant with JEDEC MO-220. Pin functions are defined per Chapter 2 of the MC9S08GB/GT Data Sheet Rev. 2.3, with dedicated BKGD/MS pin for BDM communication and separate VDD/VSS pairs for analog and digital domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08GT32CFBER, MC9S08AC60CFUE offers more program memory but reduced analog capability, while S9S08SG48F1MLC provides drop-in compatibility with higher reliability specs - making it the preferred migration path for production continuity.

Availability

MC9S08GT32CFBER is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor controllers, and medical diagnostic handhelds requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08GT32CFBER 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's microcontroller division.

The HCS08 family, including MC9S08GT32CFBER, was designed for cost-optimized, low-power embedded control in resource-constrained environments where deterministic real-time response and toolchain maturity are critical.

FAQ

What is the maximum bus frequency supported by the MC9S08GT32CFBER?

The MC9S08GT32CFBER supports a maximum bus frequency of 40 MHz, achieved through its Internal Clock Generator (ICG) module's FLL-engaged external (FEE) mode. This requires an external crystal or resonator between 32 kHz and 4 MHz, which the FLL multiplies to generate the final bus clock. The 40 MHz limit ensures timing compliance for all on-chip peripherals including the 10-bit ATD and dual TPM modules in the MC9S08GT32CFBER.

Does the MC9S08GT32CFBER include an analog-to-digital converter, and what are its key specifications?

Yes, the MC9S08GT32CFBER integrates a 10-bit Analog-to-Digital Converter (ATD) module with eight input channels. It achieves 12 µs conversion time, supports both software and hardware triggering, and includes configurable sample-and-hold timing. The ATD uses an internal 2.5 V reference derived from the on-chip voltage regulator, ensuring stable accuracy across the 2.7–5.5 V supply range - a core capability of the MC9S08GT32CFBER for sensor interfacing.

How does the background debug interface (BDM) function on the MC9S08GT32CFBER?

The MC9S08GT32CFBER implements a single-wire Background Debug Mode (BDM) interface using the PTG0 pin as BKGD/MS. It enables non-intrusive flash programming, real-time register and memory inspection, and breakpoint execution without halting peripheral operation. BDM requires no external debug hardware beyond a simple level-shifter circuit and is fully supported by CodeWarrior Development Studio - a defining feature of the MC9S08GT32CFBER for rapid prototyping and field updates.

What low-power modes are available on the MC9S08GT32CFBER, and what is the lowest current consumption?

The MC9S08GT32CFBER supports three stop modes (Stop1, Stop2, Stop3) and one wait mode. In Stop3 mode - the deepest sleep state - current consumption drops to 1.5 µA at 25°C with RTC disabled and LVD off. Wake-up occurs within 4 µs via IRQ, RTI, or LVD events. This ultra-low quiescent current makes the MC9S08GT32CFBER suitable for battery-powered applications where multi-year operation is required without compromising real-time responsiveness.

Is the MC9S08GT32CFBER pin-compatible with other devices in the HCS08 family?

The MC9S08GT32CFBER uses a 44-pin LQFP package with a fixed pinout defined in the MC9S08GB/GT Data Sheet Rev. 2.3. It shares identical pin assignments with MC9S08GT16CFBER and MC9S08GT60CFBER in the same package variant, enabling hardware reuse across Flash-size variants. However, it is not pin-compatible with 64-pin devices like MC9S08AC60CFUE or 48-pin variants - pin compatibility must be verified per specific package and datasheet revision for the MC9S08GT32CFBER.