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MC68360
Product Brief
MC68360 QUad Integrated Communication
Controller (QUICC
™
)
Freescale Semiconductor, Inc...
INTRODUCTION
The MC68360 QUad Integrated Communication Controller (QUICC
™
) is a versatile one-chip integrated
microprocessor and peripheral combination that can be used in a variety of controller applications. It
particularly excels in communications activities. The QUICC (pronounced “quick”) can be described as a
next-generation MC68302 with higher performance in all areas of device operation, increased flexibility,
major extensions in capability, and higher integration. The term "quad" comes from the fact that there are
four serial communications controllers (SCCs) on the device; however, there are actually seven serial
channels: four SCCs, two serial management controllers (SMCs), and one serial peripheral interface (SPI).
QUICC Key Features
The following list summarizes the key MC68360 QUICC features:
• CPU32+ Processor (4.5 MIPS at 25 MHz)
— 32-Bit Version of the CPU32 Core (Fully Compatible with the CPU32)
— Background Debug Mode
— Byte-Misaligned Addressing
• Up to 32-Bit Data Bus (Dynamic Bus Sizing for 8 and 16 Bits)
• Up to 32 Address Lines (At Least 28 Always Available)
• Complete Static Design (0–25-MHz Operation)
• Slave Mode To Disable CPU32+ (Allows Use with External Processors)
— Multiple QUICCs Can Share One System Bus (One Master)
— MC68040 Companion Mode Allows QUICC To Be an MC68040 Companion
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Memory (SRAM), Electrically Programmable Read-Only Memory (EPROM), Flash EPROM, etc.
— Four CAS lines, Four WE lines, One OE line
— Boot Chip Select Available at Reset (Options for 8-, 16-, or 32-Bit Memory)
— Special Features for MC68040 Including Burst Mode Support
• Four General-Purpose Timers
— Superset of MC68302 Timers
— Four 16-Bit Timers or Two 32-Bit Timers
— Gate Mode Can Enable/Disable Counting
• Two Independent DMAs (IDMAs)
— Single Address Mode for Fastest Transfers
— Buffer Chaining and Auto Buffer Modes
— Automatically Performs Efficient Packing
— 32-Bit Internal and External Transfers
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• System Integration Module (SIM60)
— Bus Monitor
— Double Bus Fault Monitor
— Spurious Interrupt Monitor
— Software Watchdog
— Periodic Interrupt Timer
— Low Power Stop Mode
— Clock Synthesizer
— Breakpoint Logic Provides On-Chip Hardware Breakpoints
— External Masters May Use On-Chip Features Such As Chip Selects
— On-Chip Bus Arbitration with No Overhead for Internal Masters
— IEEE 1149.1 Test Access Port
• Interrupts
— Seven External IRQ Lines
— 12 Port Pins with Interrupt Capability
— 16 Internal Interrupt Sources
— Programmable Priority Between SCCs
— Programmable Highest Priority Request
• Communications Processor Module (CPM)
— RISC Controller
— Many New Commands (e.g., Graceful Stop Transmit, Close RxBD)
— 224 Buffer Descriptors
— Supports Continuous Mode Transmission and Reception on All Serial Channels
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• Four SCCs
— Ethernet/IEEE 802.3 Optional on SCC1 (Full 10-Mbps Support) (Available only on the
MC68EN360)
— HDLC/SDLC
™
(All Four Channels Supported at 2 Mbps)
— HDLC Bus (Implements an HDLC-Based Local Area Network (LAN))
— AppleTalk®
— Signaling System #7
— Universal Asynchronous Receiver Transmitter (UART)
— Synchronous UART
— Binary Synchronous Communication (BISYNC)
— Totally Transparent (Bit Streams)
— Totally Transparent (Frame Based with Optional Cyclic Redundancy Check (CRC))
— Profibus (RAM Microcode Option)
— Asynchronous HDLC (RAM Microcode Option) to Support PPP (Point to Point Protocol)
— DDCMP
™
(RAM Microcode Option)
— V.14 (RAM Microcode Option)
— X.21 (RAM Microcode Option)
• Two SMCs
— UART
— Transparent
— General Circuit Interface (GCI) Controller
— Can Be Connected to the Time-Division Multiplexed (TDM) Channels
• One SPI
— Superset of the MC68302 SCP
— Supports Master and Slave Modes
— Supports Multimaster Operation on the Same Bus
• Time-Slot Assigner
• Supports Two TDM Channels
— Each TDM Channel Can Be T1, CEPT, PCM Highway, ISDN Basic Rate,
ISDN Primary Rate, User Defined
— 1- or 8-Bit Resolution
— Allows Independent Transmit and Receive Routing, Frame Syncs, Clocking
— Allows Dynamic Changes
— Can Be internally Connected to Six Serial Channels (Four SCCs and
Two SMCs)
• Parallel Interface Port
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QUICC ARCHITECTURE OVERVIEW
The QUICC is 32-bit controller that is an extension of other members of the
Freescale
M68300 family. Like
other members of the M68300 family, the QUICC incorporates the intermodule bus (IMB). (The MC68302 is
an exception, having an M68000 bus on chip.) The IMB provides a common interface for all modules of the
M68300 family, which allows
Freescale
to develop new devices more quickly by using the library of existing
modules. Although the IMB definition always included an option for an on-chip 32-bit bus, the QUICC is the
first device to implement this option.
The QUICC is comprised of three modules: the CPU32+ core, the SIM60, and the CPM. Each module
utilizes the 32-bit IMB. The MC68360 QUICC block diagram is shown in Figure 1.
SIM 60
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SYSTEM
PROTECTION
CPU32+
CORE
PERIODIC
TIMER
CLOCK
GENERATION
OTHER
FEATURES
JTAG
BREAKPOINT
LOGIC
DRAM
CONTROLLER
AND
CHIP SELECTS
SYSTEM
I/F
IMB (32 BIT)
EXTERNAL
BUS
INTERFACE
CPM
COMMUNICATIONS PROCESSOR
RISC
CONTROLLER
TWO
IDMAs
FOURTEEN SERIAL
DMAs
SEVEN
SERIAL
CHANNELS
2.5-KBYTE
DUAL-PORT
RAM
INTERRUPT
CONTROLLER
FOUR
GENERAL-
PURPOSE
TIMERS
TIMER SLOT
ASSIGNER
OTHER
FEATURES
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fetch two word-length instructions in one bus cycle, filling the internal instruction queue more quickly. The
CPU32+ core can also read and write 32-bits of data in one bus cycle.
Although the CPU32+ instruction timings are improved, its instruction set is identical to that of the CPU32. It
will also execute the entire M68000 instruction set. It contains the same background debug mode (BDM)
features as the CPU32. No new compilers, assemblers, or other software support tools need be
implemented for the CPU32+; standard CPU32 tools can be used.
The CPU32+ delivers approximately 4.5 MIPS at 25 MHz, based on the standard (accepted) assumption that
a 10-MHz M68000 delivers 1 VAX MIPS. If an application requires more performance, the CPU32+ can be
disabled, allowing the rest of the QUICC to operate as an intelligent peripheral to a faster processor. The
QUICC provides a special mode called MC68040 companion mode to allow it to conveniently interface to
members of the M68040 family. This two-chip solution provides a 22-MIPS performance at 25 MHz.
The CPU32+ also offers automatic byte alignment features that are not offered on the CPU32. These
features allow 16 or 32-bit data to be read or written at an odd address. The CPU32+ automatically performs
the number of bus cycles required.
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System Integration Module (SIM60)
The SIM60 integrates general-purpose features that would be useful in almost any 32-bit processor system.
The term “SIM60” is derived from the QUICC part number, MC68360. The SIM60 is an enhanced version of
the SIM40 that exists on the MC68340 and MC68330 devices.
First, new features, such as a DRAM controller and breakpoint logic, have been added. Second, the SIM40
was modified to support a 32-bit IMB as well as a 32-bit external system bus. Third, new configurations, such
as slave mode and internal accesses by an external master, are supported.
Although the QUICC is always a 32-bit device internally, it may be configured to operate with a 16-bit data
bus. Regardless of the choice of the system bus size, dynamic bus sizing is supported. Bus sizing allows 8-,
16-, and 32-bit peripherals and memory to exist in the 32-bit system bus mode and 8- and 16-bit peripherals
and memory to exist in the 16-bit system bus mode.
Communications Processor Module (CPM)
The CPM contains features that allow the QUICC to excel in communications and control applications. These
features may be divided into three sub-groups:
• Communications Processor (CP)
• Two IDMA Controllers
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