NXP Semiconductors MC68LK332GCPV16

Overview

MC68LK332GCPV16 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 +85°C temperature range in 132-pin PQFP package, and is used in motion control systems requiring deterministic real-time I/O timing and embedded motor sequencing.

For engineers reviewing the MC68LK332GCPV16 datasheet, MC68LK332GCPV16 pinout, MC68LK332GCPV16 application, or MC68LK332GCPV16 equivalent, key selection considerations include TPU channel count (16), static RAM size (2 KB), PLL-based clock synthesis, external bus interface width (16-bit data/24-bit address), and industrial temperature grade compatibility.

Technical Context

The MC68LK332GCPV16 implements a modular architecture centered on the intermodule bus (IMB), enabling independent operation of CPU32, SIM, TPU, QSM, and TPURAM. Its TPU executes time-critical tasks autonomously via 16 programmable channels with priority levels and dual timer counters, eliminating CPU intervention for PWM generation, quadrature decoding, or input capture.

System clocking uses a PLL synthesizer with selectable reference (XTAL/EXTAL), supporting dynamic frequency changes up to 16 MHz while maintaining full static operation. The SIM provides 11 chip-select outputs, programmable GPIO ports (PE, PF, PC), watchdog timers, and bus monitoring logic - all configurable via supervisor-accessible registers mapped at $YFFA00–$YFFAFF.

Key Specifications

Pinout & Package

MC68LK332GCPV16 is housed in a 132-pin PQFP (Plastic Quad Flat Package) with 0.65 mm lead pitch, compliant with JEDEC standard MS-026AC. Pin assignments follow Motorola/Freescale MC68332 family layout, with dedicated TPU channel pins, dual-function GPIO ports (PE, PF, PC), and QSM serial I/O (PQS[7:0]).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68LK332GCPV16, MC68332GCFC16 offers identical architecture and pinout with verified industrial qualification, while MC9328MX1CZK50 trades deterministic hardware timing for general-purpose processing power - making the former a drop-in replacement and the latter a platform-level redesign candidate.

Availability

MC68LK332GCPV16 is available at Aetrix Electronics and suitable for motion control systems, industrial PLC modules, automated test equipment, and power converter controllers requiring stable component supply across extended product lifecycles.

Supply support for MC68LK332GCPV16 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 long-term availability.

The MC68LK332GCPV16 belongs to the MC68332 family designed specifically for motion control and embedded automation applications requiring autonomous hardware timing, robust bus interfacing, and industrial-grade reliability.

FAQ

What is the primary function of the TPU in the MC68LK332GCPV16?

The Time Processor Unit (TPU) in the MC68LK332GCPV16 is a dedicated 16-channel microengine that executes time-critical I/O operations independently of the CPU32 core. It handles functions such as PWM generation, quadrature encoder input, input capture, output compare, and pulse width measurement - all with sub-microsecond timing precision. This offloads timing tasks from the main CPU, ensuring deterministic real-time performance essential for motion control applications using the MC68LK332GCPV16.

Does the MC68LK332GCPV16 support external memory expansion?

Yes, the MC68LK332GCPV16 supports external memory expansion via its 24-bit address bus and 16-bit data bus, with eleven programmable chip-select outputs (CS[10:0]) and dedicated control signals including AS, R/W, DS, and BERR. Each chip select has associated base address and option registers in the SIM, allowing flexible memory mapping for ROM, RAM, and peripheral devices - a key capability confirmed in the MC68LK332GCPV16's external bus interface specification.

What debugging interfaces does the MC68LK332GCPV16 provide?

The MC68LK332GCPV16 includes a hardware-supported Background Debugging Mode (BDM) accessible through four dedicated pins: BKPT/DSCLK, DSI/IFETCH, DSO/IPIPE, and RESET. This interface enables non-intrusive program loading, breakpoint setting, register inspection, and single-stepping without requiring a JTAG adapter. The BDM functionality is integral to the CPU32 core and fully documented in the MC68LK332GCPV16 technical summary.

Is the MC68LK332GCPV16 pin-compatible with other MC68332 variants?

Yes, the MC68LK332GCPV16 is pin-compatible with other 132-pin PQFP variants of the MC68332 family, including MC68332GCFC16 and MC68332GVFC16. All share identical pin assignments for ADDR[23:0], DATA[15:0], TPUCH[15:0], PQS[7:0], and GPIO ports (PE, PF, PC), as verified in Figure 2 of the MC68332TS/D datasheet. Differences are limited to temperature grade and internal configuration - not pinout.

What power management features does the MC68LK332GCPV16 offer?

The MC68LK332GCPV16 includes a low-power stop (LPSTOP) instruction that halts the system clock while preserving register and memory contents - enabled by its fully static CPU32 design. It also supports selective module gating and standby RAM retention via VSTBY supply. These features allow deep power-down states in battery-backed or energy-sensitive applications, with full state recovery upon wake-up - a capability explicitly specified for the MC68LK332GCPV16 in its technical summary.