NXP Semiconductors MC68360VR25L

Overview

MC68360VR25L from Freescale Semiconductor is a 32-bit integrated microcontroller with embedded CPU32+ core and Communications Processor Module (CPM), delivering 4.5 MIPS at 25 MHz, supporting up to seven serial channels (four SCCs, two SMCs, one SPI), and operating across –40°C to +85°C for industrial communications controllers.

For engineers reviewing the MC68360VR25L datasheet, MC68360VR25L pinout, MC68360VR25L application, or MC68360VR25L equivalent, this device serves as a high-integration QUICC™ solution for TDM-based telecom bridges, HDLC protocol stacks, Ethernet edge nodes, and multi-protocol serial gateway designs requiring deterministic real-time CPM offload.

Technical Context

The MC68360VR25L implements a dual-engine architecture: the CPU32+ core handles general-purpose execution while the RISC-based CPM independently manages all seven serial channels via 224 buffer descriptors, enabling concurrent HDLC, UART, SPI, and TDM traffic without CPU intervention. Its SIM60 module provides clock synthesis, bus arbitration, IEEE 1149.1 JTAG test access, and slave-mode operation for MC68040 companion systems.

It supports dynamic bus sizing (8/16/32-bit), four CAS/WE lines, boot-selectable memory width, and DRAM controller integration - all validated for glueless interfacing with EPROM, Flash, SRAM, and DRAM SIMMs. The time-slot assigner enables independent transmit/receive routing across two TDM buses with T1/CEPT/ISDN Primary Rate support.

Key Specifications

Pinout & Package

MC68360VR25L is housed in a 240-pin Plastic Quad Flat Pack (PQFP) with 20-mil pitch, thermally enhanced for industrial convection cooling. Pin functions are multiplexed across system bus, serial I/O, timer, interrupt, and debug interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68EN360RC25, the MC68360VR25L lacks integrated Ethernet MAC but offers broader legacy software compatibility and lower power at 25 MHz; versus MPC8260AZUUDB, it provides proven M68k ecosystem continuity and deterministic CPM latency at the cost of no hardware crypto or gigabit capability.

Availability

MC68360VR25L is available at Aetrix Electronics and suitable for industrial communications controllers, telecom access equipment, and embedded protocol gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC68360VR25L 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, connectivity, and analog solutions for automotive, industrial, and networking markets.

The MC68360VR25L belongs to the QUICC™ family - designed specifically to offload serial protocol processing from host CPUs in telecom infrastructure, industrial control, and military comms systems using a dedicated RISC-based CPM.

FAQ

What is the maximum supported data bus width for the MC68360VR25L?

The MC68360VR25L supports up to a 32-bit external data bus with dynamic bus sizing, allowing seamless interfacing with 8-bit, 16-bit, and 32-bit peripherals and memory devices without external glue logic. This capability is implemented through four independent WE lines and four CAS lines, enabling mixed-width memory subsystems in a single design. The MC68360VR25L maintains full functionality across all configurations while preserving timing integrity at 25 MHz.

Does the MC68360VR25L include an integrated Ethernet MAC?

No, the MC68360VR25L does not include an integrated Ethernet MAC. Unlike the MC68EN360 variant, the MC68360VR25L relies on external PHY devices connected to SCC1 for 10-Mbps Ethernet/IEEE 802.3 operation. Its SCC1 supports full HDLC framing and optional Ethernet microcode, but physical layer signaling requires discrete transceivers. This separation allows flexible PHY selection (e.g., fiber, twisted pair) while retaining MCU-level control over MAC-layer behavior in the MC68360VR25L.

How many serial communication channels does the MC68360VR25L support?

The MC68360VR25L supports seven serial communication channels: four Serial Communication Controllers (SCCs), two Serial Management Controllers (SMCs), and one Serial Peripheral Interface (SPI). Each SCC supports multiple protocols including HDLC, SDLC, UART, BISYNC, and transparent bit-stream modes. The SMCs handle UART, GCI, and TDM-linked interfaces, while the SPI operates in master/slave/multimaster modes. All channels operate concurrently under autonomous CPM control, independent of the CPU32+ core.

What is the role of the 2.5 KB dual-port RAM in the MC68360VR25L?

The 2.5 KB dual-port RAM in the MC68360VR25L is exclusively allocated to the Communications Processor Module (CPM) for storing buffer descriptors (BDs), parameter RAM, and communication-specific variables. Its dual-port architecture allows simultaneous access by the CPM RISC engine and CPU32+ core - enabling zero-copy data movement and real-time BD updates without stalling either processor. This RAM is not accessible as general-purpose system memory and is essential for deterministic serial protocol handling in the MC68360VR25L.

Can the MC68360VR25L operate in slave mode with an external processor?

Yes, the MC68360VR25L supports slave mode operation, allowing it to function as an intelligent peripheral co-processor alongside external CPUs such as the MC68040 or MC68EC040. In this configuration, the CPU32+ core is disabled while the CPM, SIM60, and memory controllers remain fully active - enabling shared bus access, DRAM control delegation, and interrupt forwarding. The MC68360VR25L retains full serial and timer functionality in slave mode, making it ideal for augmenting host processor I/O bandwidth without adding discrete controllers.