ST7MDT7-DBE2B データシートの表示（PDF） - STMicroelectronics

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ST7MDT7-DBE2B

REAL-TIME DEVELOPMENT TOOLS FOR THE ST7 MCU FAMILY

STMicroelectronics 

ST7MDTx-EMU2B

OVERVIEW

The ST7 real-time development tools consist of

various hardware and software components,

which together form a flexible and sophisticated

system designed to provide comprehensive devel-

opment support for the ST7 family of MCUs.

The Hardware Development System (HDS) main-

frame is common to all ST7 devices and, in con-

junction with various active probes, allows emula-

tion and development of specific devices. Only the

probe needs to be changed to emulate a new ST7

family device.

The development system is controlled by a Host

PC on which a choice of Windows-based software

may be run. The Host PC is simply connected to

the Emulator Mainframe by means of a parallel

port. The STVD7 Windows Debugger software

suite is supplied as standard issue with the Emu-

lator hardware, in addition to the conventional

DOS ST7 Software suite, which includes a mac-

roassembler, a linker/loader. Third party C Tool-

chain and Debugger software is also available.

The Windows-based debugger provides a user

friendly and highly flexible interface which may be

configured to precisely match the user’s require-

ments. All emulator settings are accessible via the

control software.

Once assembled, and/or compiled and linked, the

application software may be downloaded to the

real-time emulation memory, which can be config-

ured, mapped and modified as required by the us-

er. The device probe is then connected to the ap-

plication target hardware in place of the MCU and

real-time emulation of the target application can

begin, thus allowing sophisticated testing and de-

bugging of both application hardware and soft-

ware.

User definable breakpoints allow the MCU to be

halted when the application software accesses

specific addresses, and/or addresses within a se-

lected range, and/or on data fetch cycles. The

user may then read and modify any register and

memory location. An on line assembler/disassem-

bler is also available to ease debugging.

An important feature of the ST7 development sys-

tem is that true source level debugging is possible,

meaning code may be viewed at source level and

breakpoints may be set on high level code, rather

than on disassembled target code. This is much

more meaningful to the user and ensures a more

convivial and productive development environ-

ment.

A separate and concurrent Logic Analyzer func-

tion is available. This hardware implemented func-

tion features 1KByte of 32-bit wide trace memory

which allows events to be defined for any combi-

nation of address (16 bits) and data (8 bits), as

well as according to the state of 3 internal and 5

external logic signals. Complex and sequential

conditions may be defined, and all bits are maska-

ble. The external signals are input from 5 probes

which can be connected to the target hardware.

Trace memory events may be used as break-

points or simply to trigger data acquisition accord-

ing to user specified parameters, without halting

the target system. Such a powerful tool enables

the user to detect and trap virtually any pattern,

and thus rapidly debug the target application.

Log files offer the ability to send any screen dis-

play to a text file. In particular, log files are very

useful to save the contents of the logic analyzer

and/or the contents of data registers to be subse-

quently analysed or printed.

Command files can be used to execute a set of

debugger commands in batch mode, to simplify

and speed up the emulation session.

The SFR window offers symbolic display of the

SFRs, showing the peripherals, symbolic display

of the registers.

Finally, when the target program is fully de-

bugged, the appropriate ST7 EPROM/OTP/

FLASH programming board can be used to pro-

gram the EPROM/OTP/FLASH version of the tar-

get device to allow stand-alone testing and evalu-

ation.

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