MOTOROLA MCF5206 Mcf5206 integrated microprocessor Datasheet

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MCF5206 Integrated Microprocessor
The MCF5206 integrated microprocessor combines a ColdFire processor core with several peripheral
functions such as a DRAM controller, timers, parallel and serial interfaces, and system integration. Designed
for embedded control applications, the ColdFire core delivers enhanced performance while maintaining low
system costs. To speed program execution, the on-chip instruction cache and SRAM provide one-cycle
access to critical code and data. The MCF5206 processor greatly reduces the time required for system design
and implementation by packaging common system functions on chip and providing glueless interfaces to 8-,
16-, and 32-bit DRAM, SRAM, ROM, and I/O devices.
The revolutionary ColdFire microprocessor architecture gives cost-sensitive, high-volume markets new levels
of price and performance. Based on the concept of variable-length RISC technology, ColdFire combines the
architectural simplicity of conventional 32-bit RISC with a memory-saving, variable-length instruction set. In
defining the ColdFire architecture for embedded processing applications, Motorola incorporated RISC
architecture for peak performance and a simplified version of the variable-length instruction set found in the
M68000 Family for code density.
By using a variable-length instruction set architecture, embedded processor designers using ColdFire RISC
processors will enjoy significant system-level advantages over conventional fixed-length RISC architectures.
The denser binary code for ColdFire processors consumes less valuable memory than any fixed-length
instruction set RISC processor available. This improved code density means more efficient system memory
use for a given application, and requires slower, less costly memory to help achieve a target performance
level.
The integrated peripheral functions provide high performance and flexibility. The DRAM controller supports
up to 512 Mbytes of DRAM. The MCF5206 processor supports both page-mode and extended-data-out
DRAMs. The serial interfaces consist of a programmable full duplex DUART and a separate I2C1-compatible
Motorola bus (M-Bus interface). The two 16-bit general-purpose multimode timers provide separate input and
output signals. For system protection, the processor includes a programmable 16-bit software watchdog timer
and several bus monitors. In addition, common system functions such as chip-selects, interrupt control, bus
arbitration, and IEEE 1149.1 Test (JTAG) support are included.
A sophisticated debug interface supports both background-debug mode and real-time trace. This interface is
common to all ColdFire-based processors and allows common emulator support across the entire ColdFire
Family.
ColdFire is a trademark of Motorola.
1. I2C
bus is a proprietary Philips interface bus.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
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The primary features of the MCF5206 integrated processor include the following:
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• ColdFire Processor Core
— Variable-length RISC
— 32-bit internal address bus with up to 256 Mbytes of off-chip linear address space
— 32-bit data bus
— 16 user-visible 32-bit wide registers
— Supervisor / User modes for system protection
— Vector base register to relocate exception-vector table
— Optimized for high-level language constructs
— 17 MIPS at 33Mhz
• 512-Byte Direct-Mapped Instruction Cache
• 512-Byte On-Chip SRAM
— Provides one-cycle access to critical code and data
• DRAM Controller
— Supports up to 32 Mbytes of memory using 4M x 1 DRAMs, 128 Mbytes using 16M x 1
DRAMs, 256 Mbytes using 32x1 DRAMS
— Programmable refresh timer provides CAS-before-RAS refresh
— Support for 2 separate memory banks
— Support for page-mode DRAMs and extended-data-out (EDO) DRAMs
— Allows external bus master access
• Dual Universal Synchronous/Asynchronous Receiver/Transmitter (DUART)
— Full duplex operation
— Flexible baud-rate generator
— Modem control signals available (CTS, RTS)
— Processor-interrupt capability
— Compatible with MC68681 DUART programming model
• Dual 16-Bit General-Purpose Multimode Timers
— 8-bit prescaler
— Timer input and output pins
— 30ns resolution with 33MHz system clock
— Processor-interrupt capability
• Motorola Bus (M-Bus) Module
— Interchip bus interface for EEPROMs, LCD controllers, A/D converters, keypads
— Compatible with industry-standard I2C Bus
— Master or slave modes support multiple masters
— Automatic interrupt generation with programmable level
• System Interface
— Glueless bus interface to 8-, 16-, and 32-bit DRAM, SRAM, ROM, and I/O devices
— 8 programmable chip-select signals
— Programmable wait states and port sizes
— Allows external bus masters to access chip-selects
—System protection
• 16-bit software watchdog timer with prescaler
• Double bus fault monitor
• Bus timeout monitor
• Spurious interrupt monitor
— Programmable interrupt controller
• Low interrupt latency
• 3 external interrupt inputs
• Programmable interrupt priority and autovector generator
— IEEE 1149.1 test (JTAG) support
— 8-Bit General-Purpose I/O Interface
• System Debug Support
— Real-time trace
— Background debug interface
• Fully Static 5.0-Volt Operation
• 160 Pin QFP Package
2
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OVERVIEW
Figure 1 is a block diagram of the MCF5206 processor. The paragraphs that follow provide an overview of the
integrated processor.
CLOCK
JTAG
JTAG
INTERFACE
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DRAM
CONTROLLER
CLOCK
512 BYTE ICACHE
512 BYTE SRAM
SYSTEM BUS
CONTROLLER
INPUT
CHIP
SELECTS
DRAM
CONTROL
CHIP
SELECTS
INTERRUPT
CONTROLLER
INTERRUPT
SUPPORT
EXTERNAL
BUS INTERFACE
EXTERNAL
BUS
PARALLEL
PORT
PARALLEL
DUART
INTERFACE
SERIAL
INTERFACE
TIMERS
BDM
COLDFIRE
INTERFACE
CORE
M-BUS
MODULE
TIMER
SUPPORT
M-BUS
INTERFACE
Figure 1. MCF5206 Block Diagram
ColdFire Processor Core
The ColdFire processor core consists of two independent, decoupled pipeline structures to maximize
performance while minimizing core size.The instruction fetch pipeline (IFP) is a two-stage pipeline for
prefetching instructions. The prefetched instruction stream is then gated into the two-stage operand execution
pipeline (OEP), which decodes the instruction, fetches the required operands and then executes the required
function. Because the IFP and OEP pipelines are decoupled by an instruction buffer that serves as a FIFO
queue, the IFP can prefetch instructions in advance of their actual use by the OEP, thereby minimizing time
stalled waiting for instructions. The OEP is implemented in a two-stage pipeline featuring a traditional RISC
datapath with a dual-read-ported register file feeding an arithmetic/logic unit.
Instruction Cache
The instruction cache improves system performance by providing cached instructions to the execution unit in
a single clock. The MCF5206 processor uses a 512-byte, direct-mapped instruction cache to achieve 17 MIPS
at 33 Mhz.The cache is accessed by physical addresses, where each 16-byte line consists of an address tag
and a valid bit.
The instruction cache also includes a bursting interface for 32-, 16-, and 8-bit port sizes to quickly fill cache
lines.
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Internal SRAM
The 512-byte on-chip SRAM provides one clock-cycle access for the ColdFire core. This SRAM can store
processor stack and critical code or data segments to maximize performance.
DRAM Controller
The MCF5206 DRAM controller provides a glueless interface for up to 2 banks of DRAM, each of which can
be from 128 Kbytes up to 256 Mbytes in size. The controller supports an 8-, 16-, or 32-bit data bus. A unique
addressing scheme allows for increases in system memory size without rerouting address lines and rewiring
boards. The controller operates in full-page mode, burst-page mode, or in regular mode, and supports
extended-data-out (EDO) DRAMs. At 33Mhz, the DRAM controller supports DRAMs with access times as fast
as 60ns.
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DUART Module
A full duplex DUART module contains independent receivers and transmitters that can be clocked by the
DUART internal timer. This timer is clocked by the system clock or an external clock supplied by the TIN pin.
Data formats can be 5, 6, 7, or 8 bits with even, odd, or no parity, and up to 2 stop bits in 1/16 increments.
Four-byte receive buffers and two-byte transmit buffers minimize CPU service calls. The DUART module also
provides several error-detection and maskable-interrupt capabilities. Modem support includes request-to-send
(RTS) and clear-to-send (CTS) lines.
The system clock provides the clocking function via a programmable prescaler. Users can select full duplex,
autoecho loopback, local loopback, and remote loopback modes. The programmable DUART can interrupt the
CPU on various normal or error-condition events.
Timer Module
The timer module includes 2 general-purpose timers, each of which contains a free-running 16-bit timer for use
in any of 3 modes. One mode captures the timer value with an external event. Another mode triggers an
external signal or interrupts the CPU when the timer reaches a set value, while a third mode counts external
events. The timer unit has an 8-bit prescaler that allows programming of the clock input frequency, which is
derived from the system clock. The programmable timer-output pin generates either an active-low pulse or
toggles the output.
Motorola Bus (M-Bus) Module
The M-Bus interface is a two-wire, bidirectional serial bus that exchanges data between devices and is
compatible with the I2C Bus standard. The M-Bus minimizes the interconnection between devices in the end
system and is best suited for applications that need occasional bursts of rapid communication over short
distances among several devices. Bus capacitance and the number of unique addresses limit the maximum
communication length and the number of devices that can be connected.
System Interface
The MCF5206 processor provides a glueless interface to 8-, 16-, and 32-bit port size SRAM, ROM, and
peripheral devices with independent programmable control of the assertion and negation of chip-selects and
write-enables. Programmable address and data-hold times can be extended for a compatible interface to
external devices and memory. The MCF5206 also supports bursting ROMs.
External Bus Interface. The bus interface controller transfers information between the ColdFire core and
memory, peripherals, or other masters on the external bus. The external bus interface provides up to 28 bits
of address bus space, a 32-bit data bus, and all associated control signals. This interface implements an
extended synchronous protocol that supports bursting operations. For nonsynchronous external memory and
peripherals, the MCF5206 processor provides an alternate asynchronous bus transfer acknowledgment
signal.
Simple two-wire request/acknowledge bus arbitration between the MCF5206 processor and another bus
master, such as a DMA device, is glueless with arbitration handled internal to the MCF5206 processor.
Alternately, an external bus arbiter can control more complex three-wire (request, grant, busy) multiple-master
bus arbitration, allowing overlapped bus arbitration with one clock-bus handovers.
Chip-Selects. Eight programmable chip-select outputs provide signals that enable external memory and
4
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peripheral circuits for automatic wait-state insertion. These signals also interface to 8-, 16-, or 32-bit ports. In
addition, other external bus masters can access chip-selects. The upper 4 chip-selects are multiplexed with
A[27:24] of the address bus and the 4 write-enable signals. The base address, access permissions, and timing
waveforms are all programmable with configuration registers.
Except for full-page mode, all operations are available to other external bus masters. The DRAM controller can
generate CAS and RAS for an external master and can continue to manage refresh requests.
8-Bit General-Purpose Interface. An 8-bit general-purpose programmable parallel port serves as either an
input or an output on a bit-by-bit basis. The parallel port is multiplexed with PST[3:0] and DDATA[3:0] debug
signals.
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Interrupt Controller. The interrupt controller provides user-programmable control of 3 or 7 external interrupt
and 5 internal peripheral interrupts. Users can program each internal interrupt to any one of 7 interrupt levels
and 4 priority levels within each of these levels. The 3 external interrupt signals can be configured as either
fixed interrupt levels 1, 4, and 7, or as a 7-level encoded interrupt. Users can program the external interrupts
to any one of the 4 priority levels within the respective interrupt levels.
System Protection. The MCF5206 processor contains a 16-bit software watchdog timer with an 8-bit
prescaler. The programmable software watchdog timer provides either a level 7 interrupt or a hardware reset
on timeout. The MCF5206 processor also contains a reset status register that indicates the cause of the last
reset.
JTAG.To help with system diagnostics and manufacturing testing, the MCF5206 processor includes dedicated
user-accessible test logic that complies with the IEEE 1149.1 standard for boundary scan testability, often
referred to as Joint Test Action Group, or JTAG. For more information, refer to the IEEE 1149.1 standard.
System Debug Interface
The ColdFire processor core debug interface supports real-time trace and background-debug mode. A fourpin background debug mode (BDM) interface provides system debug. The BDM is a proper subset of the BDM
interface provided on Motorola’s 683XX Family of parts.
In real-time trace, 4 status lines provide information on processor activity in real time (PST pins). A 4-bit wide
debug data bus (DDATA) displays operand data, which helps track the machine’s dynamic execution path as
the change-of-flow instructions execute. These signals are multiplexed with an 8-bit parallel port for application
development, which does not use real-time trace.
Pinout and Package
The MCF5206 device is supplied in a 160-pin plastic quad flat pack package with the pinout shown in Figure 2.
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TCK
TDO/DSO
TMS/BKPT
TDI/DSI
TRST/DSCLK
HIZ
PP[7:0]/
PST[3:0]/
DDATA[3:0]
8
PARALLEL I/O
PORT
BUS
MTMOD
JTAG
PORT
2
160 Pin QFP
COLDFIRE CORE
BUS
INTERFACEFigure
2
2 - MCF5206 Pin Out
512 BYTE ICACHE
32
512 BYTE SRAM
D[31:0]
24
A[23:0]
4
4
IPL2/IRQ7
IPL1/IRQ4
IPL0/IRQ1
INTERRUPT
CONTROLLER
2
4
M-BUS
(I2C)
MODULE
DRAM
CONTROLLER
DUART
MODULE
DUAL
TIMER
MODULE
CLOCK
2
TIN[1:0]
TxD1
RxD1
RTS1
CTS1
TxD2
RxD2
RTS2/RST0
CTS2
SDA
CLK
SCL
2
RAS[1:0]
CAS[3:0]
DRAMW
CHIP
SELECTS
TOUT[1:0]
CS[3:0]
CS[7:4]/
A[27:24]/
WE[3:0]
SYSTEM
BUS
CONTROLLER
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TS
TA
ATA
TEA
TT[1:0]
ATM
SIZ[1:0]
R/W
RSTI
BR
BG
BD
.
MORE INFORMATION
The table below identifies the packages and operating frequencies currently available for the MCF5206
processor.
MCF5206 Package/Frequency Availability
PACKAGE
Plastic Quad Flat Pack 160 lead
FREQUENCY
16, 25, and 33Mhz
Documentation
Additional and detailed information is available from Motorola literature distribution centers.
DOCUMENT NUMBER
DOCUMENT TITLE
MCF5206UM/AD
MCF5206 User’s Manual
MCF5200PRM/AD
MCF5200 ColdFire Family Programmer's
Reference Manual
AVAILABILITY
1Q97
WWW 1Q97
now
DEVELOPMENT TOOLS AND EVALUATION SYSTEMS
For information on third-party development tools support, refer to the High Performance Embedded Systems
Source (BR729/D).
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ColdFire evaluation boards are available. Contact your local Motorola sales office for technical details and
additional information on these boards.
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Visit the Motorola web site at http://www.mot.com/coldfire for additional information on any ColdFire family
product.
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