NXP Semiconductors MC68332GCAG25

Overview

MC68332GCAG25 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 25 MHz system clock, supports –40°C to +85°C industrial temperature range, and uses 132-pin PQFP package. It is used in motion control systems requiring deterministic real-time I/O timing and embedded motor drive firmware.

For engineers reviewing the MC68332GCAG25 datasheet, MC68332GCAG25 pinout, MC68332GCAG25 application, or MC68332GCAG25 equivalent, this page delivers verified technical context, validated pin functions, confirmed TPU channel count and operation mode, exact package mapping, and two rigorously cross-checked alternative parts for legacy industrial controller upgrades.

Technical Context

The MC68332GCAG25 implements a fully static CPU32 core with virtual memory support and background debugging mode, enabling zero-wait-state operation across variable clock rates. Its intermodule bus (IMB) architecture decouples CPU, SIM, TPU, QSM, and TPURAM modules, allowing independent peripheral execution without CPU intervention.

The TPU contains 16 independent programmable channels with bidirectional TPUCH[15:0] pins, each capable of executing time-critical functions like PWM generation, input capture, or quadrature decoding. The SIM provides PLL-based clock synthesis, 11 chip-select outputs, watchdog timers, and dual 8-bit I/O ports (PORT E/F), all accessible via dedicated register map at $YFFA00–$YFFAFF.

Key Specifications

Pinout & Package

MC68332GCAG25 is housed in a 132-pin Plastic Quad Flat Pack (PQFP) with 0.65 mm lead pitch and standard JEDEC MO-140 footprint. Pin functions are defined per Figure 2 (MC68332 132-Pin QFP Pin Assignments) in MC68332TS/D Rev. 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68332ACFV20 and MC9328MX1CZK, the MC68332GCAG25 uniquely delivers hard-real-time TPU offload within a compact 132-pin PQFP, making it irreplaceable for legacy motion control firmware where cycle-accurate timing and minimal BOM change are mandatory.

Availability

MC68332GCAG25 is available at Aetrix Electronics and suitable for industrial motion control, automated test equipment, power electronics gate drivers, and legacy PLC module replacements requiring stable component supply across extended product lifecycles.

Supply support for MC68332GCAG25 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 fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MC68332GCAG25 belongs to the 68300 family of modular microcontrollers designed specifically for deterministic real-time control in motion, power, and factory automation systems - emphasizing hardware offload, debuggability, and long-term industrial reliability.

FAQ

What is the maximum system clock frequency supported by the MC68332GCAG25?

The MC68332GCAG25 is rated for a maximum system clock frequency of 25 MHz, as confirmed by its orderable part number suffix "GCA" (indicating 25 MHz grade) and timing specifications in the MC68332TS/D Rev. 2 datasheet. This frequency is achievable using the internal PLL with appropriate crystal reference and loop filter components on the XFC pin.

Does the MC68332GCAG25 include on-chip RAM, and how is it configured?

Yes, the MC68332GCAG25 integrates 2 Kbytes of on-chip static RAM (TPURAM) located at address $YFFA00–$YFF9FF. This memory is configurable either as general-purpose SRAM or as TPU microcode emulation RAM - selected via the TPURAM control register (TPURAMCR) in the SIM address space.

How many TPU channels does the MC68332GCAG25 provide, and what are their key capabilities?

The MC68332GCAG25 provides 16 independent TPU channels accessible via TPUCH[15:0] pins. Each channel executes user-defined microcode for time-critical functions including input capture, output compare, PWM generation, quadrature decoding, and pulse-width measurement - all without CPU intervention.

What package type and pin count does the MC68332GCAG25 use?

The MC68332GCAG25 uses a 132-pin Plastic Quad Flat Pack (PQFP) package with 0.65 mm lead pitch, as documented in Figure 2 of the MC68332TS/D Rev. 2 datasheet. This package is distinct from the 144-pin QFP variants and requires specific PCB land patterns and thermal relief design.

Is background debugging supported on the MC68332GCAG25, and which pins are required?

Yes, the MC68332GCAG25 supports hardware-assisted Background Debugging Mode (BDM) using four dedicated pins: BKPT (breakpoint input), DSCLK (debug clock), DSI (debug serial in), and DSO (debug serial out). These signals enable non-intrusive firmware download, breakpoint setting, and register inspection without halting real-time TPU operation.