NXP Semiconductors MC68CK16Z1CAG16

Overview

MC68CK16Z1CAG16 from Freescale Semiconductor is a 16-bit microcontroller unit (MCU) based on the CPU16 core, featuring 16 KB of on-chip ROM, 512 bytes of SRAM, a 10-bit analog-to-digital converter (ADC), and a queued serial module (QSM) with QSPI and SCI interfaces. It operates at up to 16 MHz and targets embedded control in industrial instrumentation and automotive subsystems.

For engineers reviewing the MC68CK16Z1CAG16 datasheet, MC68CK16Z1CAG16 pinout, MC68CK16Z1CAG16 application, or MC68CK16Z1CAG16 equivalent, key selection criteria include its 16-bit CPU16 architecture, integrated ADC resolution and sampling rate, QSM interface flexibility, ROM/SRAM memory map, and support for low-power STOP modes in resource-constrained real-time systems.

Technical Context

The MC68CK16Z1CAG16 implements the CPU16 instruction set with full M68HC11 compatibility mode, supporting both 16-bit and 8-bit data operations. Its System Integration Module (SIM) provides clock synthesis, interrupt arbitration, chip-select generation, and external bus control with dynamic bus sizing.

It integrates a 10-bit successive-approximation ADC with 8 input channels, programmable sample time, and dedicated analog reference pins. The Queued Serial Module supports simultaneous QSPI master/slave operation and full-duplex SCI communication, each with independent transmit/receive RAM buffers and command queues.

Key Specifications

Pinout & Package

MC68CK16Z1CAG16 is housed in a 64-pin ceramic LCC (Leadless Chip Carrier) package with 1.27 mm pitch, designed for high-reliability industrial and automotive applications requiring hermetic sealing and thermal stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC16Z1CAG16 and MC9328MX1CZK, the MC68CK16Z1CAG16 offers deterministic real-time response and integrated analog front-end at lower power and BOM cost, whereas the ARM9 part trades MCU simplicity for scalable processing headroom and connectivity-making them complementary rather than interchangeable.

Availability

MC68CK16Z1CAG16 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical infusion devices, and energy metering terminals requiring stable component supply across extended product lifecycles.

Supply support for MC68CK16Z1CAG16 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) was a leading designer of embedded processors and analog/mixed-signal ICs, specializing in automotive, industrial, and networking applications.

The M68HC16Z series was developed to extend the M68HC11 architecture into higher-performance 16-bit embedded control, emphasizing ROM-based reliability, low-power operation, and integrated peripherals for safety-critical real-time systems.

FAQ

What is the maximum operating frequency of the MC68CK16Z1CAG16?

The MC68CK16Z1CAG16 operates at a maximum clock frequency of 16 MHz, derived from an external crystal or oscillator connected to the CLKIN pin. This frequency governs instruction execution speed, ADC conversion timing, and serial interface baud rates. The internal clock synthesizer supports prescaling and division to generate system clocks for different modules, ensuring synchronized operation across CPU, SIM, and peripherals within the MC68CK16Z1CAG16.

Does the MC68CK16Z1CAG16 include on-chip flash memory?

No, the MC68CK16Z1CAG16 does not include flash memory. It features 16 KB of masked ROM for program storage, which is programmed during wafer fabrication and cannot be reprogrammed in-system. This design prioritizes code integrity and immunity to corruption in harsh environments. For field-upgradable firmware, external serial EEPROM or parallel flash must be interfaced via the MC68CK16Z1CAG16's external bus or QSPI peripheral.

How many analog input channels does the ADC in the MC68CK16Z1CAG16 support?

The MC68CK16Z1CAG16 integrates a 10-bit successive-approximation ADC with eight single-ended analog input channels (AD0–AD7). These inputs are multiplexed into a single converter core, allowing sequential sampling under software or timer control. The ADC supports programmable sample time and multiple conversion modes-including continuous scan and burst-enabling flexible sensor monitoring strategies within the MC68CK16Z1CAG16's real-time control loop.

What debug interface does the MC68CK16Z1CAG16 provide?

The MC68CK16Z1CAG16 includes Background Debug Mode (BDM), a single-wire serial interface that enables full in-circuit debugging without halting real-time operation. BDM supports memory read/write, register inspection, breakpoint insertion, and program flow control directly through the BKGD pin. This capability is essential for validating timing-critical firmware and diagnosing hardware interactions during development and field service of the MC68CK16Z1CAG16.

Is the MC68CK16Z1CAG16 pin-compatible with other members of the M68HC16Z family?

Yes, the MC68CK16Z1CAG16 shares the same 64-pin ceramic LCC package and pinout with MC68HC16Z1, MC68HC16Z2, and MC68HC16Z4 variants. However, functional differences exist: MC68HC16Z2/Z3 include additional masked ROM, MC68HC16Z4 adds the Multichannel Communication Interface (MCCI), and MC68CK16Z1CAG16 omits MCCI but retains full QSM functionality. Pin compatibility enables board-level reuse, though firmware and peripheral initialization must match the specific variant's feature set.