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ARM7 TDMI ™ STR710, STR711, STR712, STR720, STR730, STR731, STR750 Derivatives - Architectural Overview of the HighEnd 32-Bit Single-Chip Microcontrollers

The ARM7 TDMI ™ embedded microcontroller core is a member of the Advanced RISC Machines (ARM®) family of general purpose 32-bit microprocessors, which offer high performance and very lower power consumption. Its outstanding feature is the 16-bit Thumb® subset of the most commonly used 32-bit instructions. These are expanded at run time with no degradation of system performance. This gives 16-bit code density (saving memory area and cost) coupled with 32-bit processor performance.

The ARM architecture is based on Reduced Instruction Set Computer (RISC) principles, and the instruction set and related decode mechanism are much simpler than those of microprogrammed Complex Instruction Set Computers. This simplicity results in a high instruction throughput and impressive real-time interrupt response from a small and cost-effective chip.

Pipelining is employed so that all parts of the processing and memory systems can operate continuously. Typically, while one instruction is being executed, its successor is being decoded, and a third instruction is being fetched from memory.

The ARM memory interface has been designed to allow the performance potential to be realized without incurring high costs in the memory system. Speed-critical control signals are pipelined to allow system control functions to be implemented in standard low-power logic, and these control signals facilitate the exploitation of the fast local access modes offered by industry standard dynamic RAMs.

Supported Derivatives by Universal Debug Engine

STMicroelectronics STR710
STMicroelectronics STR711
STMicroelectronics STR712
STMicroelectronics STR720
STMicroelectronics STR730
STMicroelectronics STR731
STMicroelectronics STR750

ARM7 TDMI ™ Architecture Feature Overview

32/16-bit RISC architecture ( ARM v4T )
32-bit ARM instruction set for maximum performance and flexibility
16-bit Thumb instruction set for increased code density
Unified bus interface, 32-bit data bus carries both instructions and data
8-, 16-, and 32-bit Data Types
Three-stage pipeline
4GBytes Linear Address Space
32-bit ALU and high-performance multiplier
Very small die size and low power consumption
Fully static operation
Coprocessor interface
Extensive debug facilities:
- EmbeddedICE-RT real-time debug unit
- On-chip JTAG interface unit
- Interface for direct connection to Embedded Trace Macrocell (ETM)
Very Low Power Consumption: Industry-leader in MIPS/Watt

STR710 Features

Industry standard ARM7 TDMI RISC 16/32 bit CPU
128K / 256K embedded fast FLASH
- - up to 48MHz with 0 wait states (with acceleration)
- - up to 30MHz with 0 wait states (without acceleration) with no penalty from context switches and branches.
16 /64K high-speed SRAM
Versatile package options
- Small, low pin-count TQFP64 package
- TQFP144 package with external memory bus
Up to 10 communication interfaces including CAN, USB, HDLC, MMC and smartcard interface
Four low power modes

STR720 Features

Industry standard ARM7 TDMI RISC 16/32 bit CPU
Mixed data, instruction cache and write buffer increase execution speed and reduce memory bandwidth
Combining SDRAM and Cache gives you optimum performance
MMU allows running advanced Operating Systems such as Linux, WIN-CE, QNX
Memory interfaces make the product very versatile and ideal for scalable applications
External Memory Interface for FLASH and SRAM
8kByte cache, and Memory Management Unit
SDRAM interface with 128MBytes address space
Six communication peripherals including CAN and USB
Four low power modes

UDE - Universal Debug Engine

UDE - Universal Debug Engine - is a flexible debug platform with Multi-core debugging. This development workbench is available for Infineon’s 16-bit architecture SAB C16x, C166CBC, C166S V2, the 32-bit TriCore TC1766, TC1796 as well the ST10F16x, ST10F26x and ST10F280 architecture from STMicroelectronics, the ARM7, ARM9, PowerPC and XScale derivatives.

It lets you organize your projects, supports you while building applications and lets you run and test your software in a convenient and cost-efficient way. UDE represents a completely new debugger architecture and tool concept based on a customizable set of standard components and core specific add-ons.

JTAG is fully supported by UDE offering direct high-speed access to the MCUs internal units (registers, control unit...) and features like breakpoints, stepping in ROM/FLASH as well as complex trigger conditions without any external hardware or software resources. OCDS L2 instruction trace capability is available for all member of the TriCore family. Target ROM monitor and Bootstrap loader / RAM monitor solutions for a flexible access via a wide variety of debug channels (ASC, SSC, 3-PIN, CAN) are available.

UDE MemTool as a part of UDE is designed for On-Chip and On-Board FLASH/OTP programming with microcontroller systems using SAB C16x, C166CBC, C166S-V2, XC16x, ST10, TriCore, ARM7, ARM9, PowerPC and XScale derivatives.

The UDE demo version within a Starterkit for ARM7 TDMI is available.

Trademarks

ARM, EmbeddedICE and Thumb are registered trademarks of ARM Limited. ARM7, ARM9 and Embedded Trace Macrocell, are trademarks of ARM Limited. ST is a registered trademark of companies belonging to the STMicroelectronics Group. All other brands or product names are the property of their respective holders.