NXP Semiconductors MC68302AG16VC

Overview

MC68302AG16VC from Motorola is a 16 MHz clocked, 32-bit integrated multiprotocol processor (IMP) with on-chip UART, timer, and system integration logic, designed for embedded communications and industrial control applications requiring real-time protocol handling and host interface support.

For engineers reviewing the MC68302AG16VC datasheet, MC68302AG16VC pinout, MC68302AG16VC application, or MC68302AG16VC equivalent, key selection factors include its 16 MHz IMP core frequency, dual-channel UART capability, 32-bit address/data bus architecture, and compatibility with M68302FADS development hardware for rapid firmware validation.

Technical Context

The MC68302AG16VC implements a full 68000-compatible CPU32 core with integrated peripheral controller (IPC), supporting synchronous and asynchronous serial protocols via two independent DUART channels. It integrates a 16-bit timer, interrupt controller, and memory management unit for direct SRAM/FLASH interfacing without external glue logic.

Its IMP architecture unifies protocol processing (HDLC, SDLC, BISYNC) and host communication in a single chip, eliminating discrete UARTs and protocol accelerators. The device operates from a single +5 V supply and supports both internal and external clock sources, with reset and abort controls mapped to dedicated pins for deterministic system initialization.

Key Specifications

Availability

MC68302AG16VC is available at Aetrix Electronics and suitable for industrial protocol gateways, legacy telecom terminal controllers, and embedded SCADA RTUs requiring stable component supply and long-term design continuity.

Supply support for MC68302AG16VC 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

Motorola Semiconductor (later Freescale, now NXP) was a pioneer in 68K-family microprocessors and communications ICs, delivering high-reliability embedded solutions for industrial and telecom infrastructure.

The MC68302AG16VC belongs to the MC68302 IMP family, engineered specifically to consolidate protocol processing, host interface, and real-time control functions into a single chip for cost-sensitive, space-constrained communications equipment.

FAQ

What is the maximum operating frequency of the MC68302AG16VC?

The MC68302AG16VC is rated for a maximum IMP clock frequency of 16 MHz, as specified in Motorola's official documentation and validated on the M68302FADS evaluation platform. This frequency determines instruction execution rate, UART baud generation accuracy, and timer resolution. The MC68302AG16VC does not support overclocking beyond this rating, and system timing must be designed around this fixed clock domain.

Does the MC68302AG16VC include on-chip memory?

No, the MC68302AG16VC contains no embedded RAM or ROM. It relies entirely on external memory interfaces - including 32-bit address and 16-bit data buses - to connect to off-chip SRAM, FLASH, and EEPROM, as demonstrated in the M68302FADS reference design with 512 KB SRAM and 1 MB FLASH. The MC68302AG16VC provides all necessary control signals for zero-wait-state operation with compatible memory devices.

Which development hardware supports the MC68302AG16VC?

The MC68302AG16VC is fully supported by the M68302FADS (Family Application Development System), which includes sockets for MC68302RC25, MC68LC302RC20, and MC68PM302RC20 - and is mechanically and electrically compatible with the MC68302AG16VC's 160-pin PGA package. The M68302FADS provides flash, RAM, DUART, and debugger infrastructure tailored for the MC68302AG16VC.

What UART functionality does the MC68302AG16VC provide?

The MC68302AG16VC integrates a dual-channel UART function compatible with the MC68681 DUART, supporting independent RS-232 serial communication on two ports with programmable baud rates, framing, and interrupt-driven I/O. This capability is confirmed in the M68302FADS documentation and enables direct connection to modems, terminals, or host PCs without external UART ICs - a core feature of the MC68302AG16VC's IMP architecture.

Is the MC68302AG16VC pin-compatible with other MC68302 variants?

Yes, the MC68302AG16VC shares identical pinout and package (160-pin PGA) with MC68302RC25, MC68LC302RC20, and MC68PM302RC20, as verified by Motorola's M68302FADS board layout and socket compatibility. All variants use the same signal mapping and electrical characteristics per pin, enabling drop-in replacement within the same clock and voltage constraints - a key design feature of the MC68302AG16VC family.