FEDL674000-02
Issue Date: Dec. 10, 2002
OKI Semiconductor
ML674000
32-bit General-purpose, ARM-based Microcontroller
GENERAL DESCRIPTION
Oki’s ML674000 standard microcontroller (MCU) is a member of an extensive and growing family of ARM®
architecture 32-bit MCUs for general-purpose applications that require 32-bit CPU performance and low cost
afforded by MCU integrated features.
ML674000 MCU provides a host of useful peripherals such as 8KB of on-board SRAM, timers, watchdog timer,
pulse-width modulators, AD converter, UART’s, GPIO connectivity capability, and external memory controller.
These integrated features make it ideal for embedded applications where low costs and low power consumption are
key.
Oki’s ML674K series MCUs are capable of executing both the 32-bit ARM instruction set for high-performance
applications as well as the 16-bit Thumb® instruction set for power-efficient applications. With an ARM7TDMI®
core operating at 33 MHz maximum frequency, ARM Thumb™ capabilities, and robust feature sets, the ML674K
series MCUs are suitable for an array of applications including high performance industrial controllers and
instrumentation, telecom, PC peripherals, security/surveillance, test equipment, and a variety of consumer
electronics devices.
The ARM7TDMI® Advantage
Oki’s ML67 Family of low-cost ARM-based MCUs offers system designers a bridge from 8- and 16-bit
proprietary MCU architectures to ARM’s higher-performance, affordable, widely-accepted industry standard
architecture and its industry-wide support infrastructure. The ARM industry infrastructure offers system
developers many advantages including software compatibility, many ready-to-use software applications, and
numerous choices among hardware and software development tools. These ARM-based advantages allow Oki’s
customers to better leverage engineering resources, lower development costs, minimize project risks, and reduce
their product time to market. In addition, migration of a design with an Oki standard MCU to an Oki custom
solution is easily facilitated with its award-winning µPLAT™ product development architecture.
FEATURES
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CPU
32-bit RISC CPU (ARM7TDMI)
32-bit instructions (ARM Instructions) and 16-bit instructions (Thumb Instructions) mixed
General purpose registers : 31 x 32 bits
Built-in Barrel shifter and multiplier (32 bit x 8 bit, Modified Booth’s Algorithm)
Little endian
Built-in debug function
•
•
Internal memory
RAM 8KB (32-bit access)
External memory controller
ROM (FLASH): 16 Mbytes
SRAM: 16 Mbytes
DRAM: 64 Mbytes (SDRAM and EDO-DRAM support)
External IO devices: 16 Mbytes x 2 banks (with wait control by external signal)
ARM, ARM7TDMI, Multi-ICE and AMBA are registered trademarks of ARM Ltd., UK.
µPLAT is Oki's trademark.
The contents of this data sheet are subject to change for modification without notice.
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