NXP Semiconductors MC68332GMEH16

Overview

MC68332GMEH16 from Freescale Semiconductor (formerly Motorola) is a 32-bit modular microcontroller featuring CPU32 core, System Integration Module (SIM), Time Processor Unit (TPU), Queued Serial Module (QSM), and 2-Kbyte TPURAM. It operates at 16 MHz with −40°C to +125°C industrial temperature range and uses a 132-pin PQFP package. Designed for motion control systems requiring deterministic real-time I/O timing.

For engineers reviewing the MC68332GMEH16 datasheet, MC68332GMEH16 pinout, MC68332GMEH16 application, or MC68332GMEH16 equivalent, this page delivers verified technical context, validated pin functions, confirmed TPU channel capabilities, and precise clock synthesis behavior - all grounded in the official MC68332TS/D Rev. 2 technical summary.

Technical Context

The MC68332GMEH16 implements a fully static CPU32 core with virtual memory support and background debugging mode. Its intermodule bus (IMB) links five standardized modules: SIM, TPU, QSM, TPURAM, and CPU32 - enabling deterministic peripheral co-processing without CPU intervention.

The TPU contains 16 independent, software-configurable channels with dedicated microengine, each capable of edge detection, pulse width measurement, quadrature decoding, or PWM generation. The SIM integrates PLL-based clock synthesis, programmable chip selects, watchdog timers, and dual 8-bit I/O ports (PF and PE) plus one 7-bit port (PC).

Key Specifications

Pinout & Package

MC68332GMEH16 uses a 132-pin PQFP package (JEDEC MS-026AC) with 0.65 mm lead pitch and exposed thermal pad. Pin assignments follow Figure 2 in MC68332TS/D Rev. 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit motion control microcontroller applications.

Compared with MC68332CFC16 and MC68332GVFC16, the MC68332GMEH16 provides the widest operational temperature range (−40°C to +125°C) and is specifically qualified for high-reliability motion control - making it the only option certified for under-hood engine bay deployment without derating.

Availability

MC68332GMEH16 is available at Aetrix Electronics and suitable for industrial motor control, automotive engine management, and programmable logic controller applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC68332GMEH16 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) pioneered high-integration microcontrollers for real-time industrial control, emphasizing modularity, determinism, and field-proven reliability.

The MC68332 product line was designed specifically for motion control and engine management systems requiring hardware-accelerated timing - delivering tightly coupled TPU, QSM, and SIM subsystems on a single die.

FAQ

What is the maximum guaranteed operating frequency of the MC68332GMEH16?

The MC68332GMEH16 is factory-tested and guaranteed to operate at 16 MHz across its full −40°C to +125°C temperature range. This rating is explicitly defined in Table 1 of the MC68332TS/D Rev. 2 datasheet under the "Motion Control" TPU type and "−40 to +125°C" temperature grade. Operation above 16 MHz is not characterized or supported.

Does the MC68332GMEH16 include an integrated phase-locked loop (PLL)?

Yes, the MC68332GMEH16 includes a PLL-based clock synthesizer within its System Integration Module (SIM). As documented in Section 3.3 of MC68332TS/D Rev. 2, it accepts a 32.768 kHz crystal or external reference on XTAL/EXTAL and generates the internal system clock - enabling flexible clock configuration without external oscillator components.

How many independent time-processing channels does the MC68332GMEH16 support?

The MC68332GMEH16 supports 16 independent, programmable time-processing channels via its Time Processor Unit (TPU), accessible through TPUCH[15:0] pins. Each channel can execute distinct time functions - including input capture, output compare, PWM generation, and quadrature decoding - as confirmed in Section 5.1 and Figure 1 of MC68332TS/D Rev. 2.

What is the function of the TPURAM in the MC68332GMEH16?

The 2-Kbyte TPURAM in the MC68332GMEH16 serves a dual role: it operates as general-purpose static RAM for CPU32 use, or as dedicated microcode and data memory for the TPU - enabling self-contained TPU program execution without external ROM. This capability is detailed in Section 7 and Table 1 of MC68332TS/D Rev. 2.

Which serial interfaces are integrated into the MC68332GMEH16?

The MC68332GMEH16 integrates the Queued Serial Module (QSM), which combines two independent serial subsystems: a Serial Communication Interface (SCI) for asynchronous UART-style communication and a Queued Serial Peripheral Interface (QSPI) for synchronous master/slave SPI communication - both accessible via the PQS0–PQS7 pin group per Section 6 of MC68332TS/D Rev. 2.