NXP Semiconductors MC68HC16Z1MAG16

Overview

MC68HC16Z1MAG16 from Freescale Semiconductor is a 16-bit microcontroller unit (MCU) featuring the CPU16 core, 16 KB on-chip SRAM, 512-byte internal EEPROM, 10-bit ADC with 8 channels, QSM serial interface (QSPI + SCI), and system integration module (SIM) with programmable chip-selects and interrupt arbitration. It operates at up to 16 MHz and targets industrial control and embedded instrumentation.

For engineers reviewing the MC68HC16Z1MAG16 datasheet, MC68HC16Z1MAG16 pinout, MC68HC16Z1MAG16 application, or MC68HC16Z1MAG16 equivalent, key selection criteria include its 10-bit ADC resolution, QSPI/SCI dual-serial capability, 16 MHz max clock, 16 KB SRAM size, and 64-pin LQFP package - all critical for real-time sensor interface and deterministic I/O control in resource-constrained systems.

Technical Context

The MC68HC16Z1MAG16 implements the CPU16 architecture with 16-bit data and 24-bit address bus, supporting extended addressing modes including indexed, relative, and accumulator offset. Its SIM provides dynamic bus sizing, programmable chip-select timing, and integrated watchdog, reset, and low-power STOP mode control.

It integrates a Queued Serial Module (QSM) combining QSPI master/slave operation with configurable FIFO depth and SCI asynchronous communication at baud rates up to 1 Mbps. The ADC subsystem supports single-ended and differential inputs with programmable sample time and conversion trigger sources including software, timer, or external event.

Key Specifications

Pinout & Package

MC68HC16Z1MAG16 is housed in a 64-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, JEDEC MS-026AC compliant. Pin assignments are defined per Section 3.4 ("Pin Descriptions") and Figure 3-2 ("Pin Assignment Diagram") of the M68HC16Z Series User's Manual.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU applications.

Compared with MC68HC16Z1MAG16, MC9328MX1L offers higher compute throughput but demands external analog signal conditioning and memory, while HCS12XDP512 delivers superior ADC linearity and flash reliability in identical packaging - making it the preferred migration path for legacy HC16Z-based designs requiring enhanced precision and longevity.

Availability

MC68HC16Z1MAG16 is available at Aetrix Electronics and suitable for industrial automation, medical device manufacturing, and energy metering applications requiring stable component supply and long-term obsolescence management.

Supply support for MC68HC16Z1MAG16 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, analog, and mixed-signal ICs for automotive, industrial, and networking markets until its 2015 acquisition.

The MC68HC16Z series was developed as a cost-optimized, low-power 16-bit MCU family targeting deterministic real-time control in space- and power-constrained applications - emphasizing integrated peripherals, debug accessibility, and industrial temperature operation.

FAQ

What is the maximum operating frequency of the MC68HC16Z1MAG16?

The MC68HC16Z1MAG16 supports a maximum system clock frequency of 16 MHz, achieved via external crystal (1–16 MHz) or clock source connected to CLKIN. Internal clock synthesis derives bus and peripheral clocks from this input, with timing validated across the full industrial temperature range (–40°C to +85°C). This frequency enables up to ~8 million instructions per second for deterministic real-time control loops.

Does the MC68HC16Z1MAG16 include on-chip flash or ROM memory?

No, the MC68HC16Z1MAG16 does not include on-chip flash or masked ROM. It features 16 KB of on-chip SRAM and 512 bytes of EEPROM for nonvolatile storage. Code execution occurs from external memory mapped via the 24-bit address bus and programmable chip-select logic - a design choice enabling flexible memory sizing and field-upgradable firmware.

Can the MC68HC16Z1MAG16 operate in low-power modes?

Yes, the MC68HC16Z1MAG16 supports multiple low-power states including WAIT and STOP modes. In STOP mode, the CPU and most clocks halt while preserving SRAM and EEPROM contents, reducing current consumption to under 10 µA. Wake-up is triggered by interrupts, external pins, or reset - making it suitable for battery-powered instrumentation and remote sensing nodes.

What debug interface does the MC68HC16Z1MAG16 provide?

The MC68HC16Z1MAG16 integrates Background Debug Mode (BDM), a single-wire serial interface that supports non-intrusive breakpoints, register read/write, memory inspection, and flash programming. Unlike JTAG, BDM requires only one dedicated pin (BKGD) and minimal external circuitry - ideal for space-constrained PCB layouts and cost-sensitive production test environments.

Is the MC68HC16Z1MAG16 pin-compatible with other members of the M68HC16Z family?

Yes, the MC68HC16Z1MAG16 shares the same 64-pin LQFP package and pinout with MC68HC16Z2, Z3, and Z4 variants. Differences lie in on-chip memory configuration (e.g., Z2/Z3 include masked ROM), peripheral inclusion (e.g., MCCI in Z4), and clock speed grades - allowing hardware reuse across product tiers with firmware adaptation.