NXP Semiconductors MC68302PV20C

Overview

MC68302PV20C from Freescale Semiconductor is a single-chip integrated multi-protocol processor combining an MC68000/MC68008 microprocessor core, a System Integration Block (SIB), and a dedicated RISC-based Communications Processor (CP). It operates at 20 MHz, integrates 1152 bytes of on-chip dual-port RAM, supports HDLC/SDLC/UART/DDCMP/Totally Transparent protocols via three SCCs, and targets ISDN terminal adapters and data concentrators.

For engineers reviewing the MC68302PV20C datasheet, MC68302PV20C pinout, MC68302PV20C application, or MC68302PV20C equivalent, key selection considerations include its 20 MHz clock speed, triple SCC with protocol flexibility, dual-port RAM allocation, interrupt controller with two operation modes, and support for IDL/GCI physical interfaces in communications infrastructure designs.

Technical Context

The MC68302PV20C implements a tightly coupled architecture where the MC68000/MC68008 core handles general-purpose processing while the RISC-based CP offloads serial protocol handling. Its three full-duplex Serial Communication Controllers (SCCs) each support HDLC/SDLC, UART, DDCMP, Bisync, and Totally Transparent modes independently.

It features an Independent Direct Memory Access (IDMA) controller, six serial DMA channels dedicated to SCCs, and a Serial Management Controller (SMC) pair for Interchip Digital Link (IDL) and General Circuit Interface (GCI) channel management - enabling concurrent multi-protocol operation without CPU intervention for up to eight buffers per frame.

Key Specifications

Pinout & Package

MC68302PV20C is housed in a 132-pin Thin Quad Flat Pack (TQFP) package with 0.4 mm lead pitch, compliant with JEDEC MO-152AC. Pin assignments are defined for MC68302 derivatives and confirmed in Freescale's MC68302 Technical Data Manual (Document Number: MC68302UM/AD, Rev. 5, 2001).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-protocol communications processor applications.

Compared with MC68EN302 and MC68LC302, the MC68302PV20C delivers optimal balance of ISDN-ready protocol coverage, deterministic serial DMA, and compact 132-pin TQFP packaging - making it the preferred choice for cost-sensitive, protocol-diverse communications line cards where Ethernet or ultra-low power are not primary requirements.

Availability

MC68302PV20C is available at Aetrix Electronics and suitable for ISDN terminal adapters, data concentrators, and network bridges requiring stable component supply throughout extended product lifecycles.

Supply support for MC68302PV20C 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, networking, and industrial control solutions.

The MC68302PV20C belongs to Freescale's Integrated Multi-Protocol Processor family, engineered specifically for communications infrastructure requiring concurrent serial protocol handling, deterministic timing, and minimal external component count.

FAQ

What is the maximum operating frequency of the MC68302PV20C?

The MC68302PV20C is rated for a maximum operating frequency of 20 MHz, as indicated by the "20" in its part number suffix. This fixed-speed grade uses an external 20 MHz clock source applied to the CLKIN pin and drives all internal modules-including the MC68000 core, SCCs, and timers-at that rate. It does not support internal PLL multiplication or frequency scaling beyond this specification.

Does the MC68302PV20C support Ethernet MAC functionality?

No, the MC68302PV20C does not include an Ethernet MAC. That capability is present only in the derivative MC68EN302, which adds full IEEE 802.3-compliant Ethernet controller logic. The MC68302PV20C focuses exclusively on serial protocol acceleration (HDLC, UART, DDCMP, etc.) and lacks MII/RMII interfaces, Ethernet frame filtering, or CRC-32 generation hardware for Ethernet frames.

How much on-chip memory does the MC68302PV20C integrate?

The MC68302PV20C integrates 1152 bytes of on-chip dual-port static RAM. This memory is accessible simultaneously by the MC68000 core and the RISC Communications Processor, enabling lock-free data exchange for protocol buffers and control structures. It is not expandable or configurable as cache or instruction RAM-its size and dual-port architecture are fixed per the silicon design.

Can the MC68302PV20C operate in low-power modes?

Yes, the MC68302PV20C supports standby mode via its system control register, allowing selective shutdown of the MC68000 core while retaining CP operation and RAM contents. However, unlike the MC68LC302, it lacks deep-sleep modes drawing current in the µA range. Power reduction is achieved primarily through CPU freeze and peripheral gating-not ultra-low-quiescent operation.

Is the MC68302PV20C pin-compatible with other MC68302 variants?

Yes, the MC68302PV20C shares the same 132-pin TQFP package and pinout with all speed grades of the MC68302 (e.g., MC68302PV16C, MC68302PV25C), enabling drop-in replacement within the same speed bin. It is not pin-compatible with MC68QH302 (144-pin) or MC68LC302 (100-pin), nor with MC68EN302 due to differing pin count and signal assignment.