Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... M O T O R O L A’ S M C 6 8 3 0 2 I N T E G R AT E D M U LT I - P R O T O C O L P R O C E S S O R The MC68302 is a versatile one-chip processor that incorporates the main building blocks needed for the design of a wide variety of networking and communications products. The MC68302 was the first device to offer the benefits of a closely coupled, industry-standard, MC68000/MC68008 microprocessor core and a flexible communications architecture. This multi-channel communications device may be configured to support a number of popular industry-standard interfaces, including those for the Integrated Services Digital Network (ISDN) basic rate and terminal adapter applications. Through a combination of architectural and programmable features, concurrent operation of different protocols is easily achieved using the MC68302. Data concentrators, modems, line cards, bridges, and gateways are examples of other suitable applications for this versatile device. The MC68302 is an HCMOS device consisting of an MC68000/MC68008 microprocessor core, a system integration block (SIB), and a communications processor (CP). Product Highlights ■ ■ ■ ■ ■ ■ ■ MC68000/MC68008 Microprocessor Core Efficient architecture involves a separate RISC processor for handling communications Three Serial Communications Controllers (SCCs) Support for HDLC/SDLC, Bisync, UART, DDCMP, and Totally Transparent protocols. Two Serial Management Controllers (SMCs) for IDL and GCI Channel. Available at 16, 20, 25, and 33 MHz in three different Thin Quad Flat Pack Packages. Strong 3rd Party tools support. MC68302 MICROPROCESSOR Typical Applications ■ ■ ■ ■ ■ ■ ISDN equipment Data Concentrators Modems Line Cards Network Bridges Gateways Technical Specifications ■ MC68000/MC68008 Microprocessor Core (May be disabled to use the IMP as a peripheral) For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. - Freescale Semiconductor, Inc... Independent Direct Memory Access (IDMA) Controller Interrupt controller with two modes of operation Parallel I/O ports, some with interrupt capability On-Chip 1152-bytes of dual-port RAM Three timers, with a software watchdog timer Four programmable chip-select lines with wait-state logic Programmable address mapping of dual-port RAM and IMP registers - On-Chip clock generator with an output clock signal - System control • • • • • • • ■ Bus arbitration logic with low interrupt latency support System control register Hardware watchdog for monitoring bus activity Low power (Standby) modes Disable CPU logic (M68000) Freeze control for debugging selected on-chip peripherals DRAM refresh controller MC68000/MC68008 CORE MC68000 BUS MC68000/MC68008 CORE On-Chip Peripherals Bus Interface Unit Interrupt Controller CP Including: Chip-Select And WaitState Logic System Control Clock Generator 1 Channel IDMA 3 Timers DRAM Refresh Controller Parallel I/O - Main controller (RISC Processor) - Three full-duplex Serial Communication/Controllers with the following protocols: • • • • • • 1152 Bytes Dual-Port Static RAM Bus Arbiter System Integration Block Peripheral Bus 6 Channels SDMA HDLC/SDLC Bisync UART DDCMP Totally Transparent V.110 SMC (2) SCC1 SCC2 SCC3 SCP Main Controller (RISC) - Six serial DMA channels dedicated to the three SOCs - Capability to send/receive up to eight buffers/frames without M68000 core intervention - Flexible physical interface accessible by SCCs for Interchip Digital Link (IDL), General Circuit Interface (GCI). - Pulse Code Modulation (PCM), and Non-multiplexed Serial Interface (NMSI) Operation. - Serial Communication Port (SCP) for synchronous com- Two Serial Management Controllers (SMCs) for IDL and GCI Channel. Serial Channels Physical Interface Communications Processor I/O Ports And Pin Assignments munication. Contact Information ■ Motorola offers user’s manuals, application notes and sample code for all of its communications processors. In addition, local support for these products is also provided. This information can be found at: MC68302 Derivatives MC68LC302 - Static EC000 Core - On-Chip PLL - Low Power Modes Down in µA Range - Two SCC's - 100-Pin TQFP http://motorola.com/netcomm/ ■ For all other inquiries about Motorola products, please contact the Motorola Customer Response Center at: Phone: 800-521-6274 MC68EN302 - Full Ethernet 802.3 Compliant Controller Independent of SCC’s - Full DRAM Controller - Parity Support - Dynamic Bus Sizing - Full Superset of 68302 - 144-Pin TQFP For More Information On This Product, Go to: www.freescale.com MC68QH302 - 68000 Core Processor - System Integration Block - RISC Communications Processor - Two SCC’s - One Dual Channel SCC - Pin Compatible with 68302 - 144-Pin TQFP