JPH04128940A - Emulator - Google Patents

Abstract

PURPOSE:To protect an emulator from causing a failure in the built-in amplifier when the emulator is loaded with software by mounting the evaluation chip in the pin connector section of the connector. CONSTITUTION:Application set 8 is connected directly to the I/O of the evaluation chip by using the pin of evaluation mounting connector 1. Further, the evaluation chip is connected to the I/O of the emulation board via cable 2. With this, to the amplifier built in evaluation chip 7 a regular signal on the system is input without being affected by noise. Accordingly, the evaluation chip 7 including the built-in amplifier is allowed to carry out accurate evaluation. With this, software can be developed under the same environment as that where this product was mounted in an application set, and the condition never occurs that a failure of the built-in amplifier is found after the completion of the software.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an emulator, and more particularly to a microprocessor emulator having a type of input terminal incorporating an amplifier dedicated to weak signals.

[Conventional technology]

Conventionally, this type of emulator has three devices: an application set, an emulation board, and a controller, and the application set and emulation board are connected to each other by cables, and the emulation board and the controller are connected to each other by cables.

Software was developed and debugged with an evaluation chip (hereinafter referred to as an evaluation chip) mounted on an emulation board using an IC connector.

FIG. 3 is a schematic diagram of the configuration of a conventional emulator for microprocessor software development having an input terminal with a built-in input signal amplifier.

The weak signal output from the application set 8 is sent to the external amplifier circuit 1 to prevent the influence of noise on the connection cable 2.
After being amplified by 2, the signal is input to the evaluation chip 7 on the emulation board 15 via the cable 2.

However, this input signal has a different amplitude from the regular signal on the system.

[Problem to be solved by the invention]

In conventional emulators, if this product's chip or evaluation chip has a built-in amplifier, the output signal of the application set is weak and the voltage amplitude is small, and the evaluation chip may malfunction due to noise on the connection cable between the application set and the emulation board. To do this, when outputting a signal from an application set, a separate external amplifier or the like was used to amplify the signal.

However, this method had the disadvantage that it was not possible to confirm the normal operation of the amplifier built into the actual chip of this product.

In addition, this was a drawback that had a major impact on the completion time of the product, as there were many cases where defects in the built-in amplifier were discovered after the software was completed and the software was installed on the chip of this product. .

[Means to solve the problem]

The emulator of the present invention is an emulator for software development and debugging that includes an evaluation chip and a cable that connects an application set and an emulation board using a connector, in which the evaluation chip is mounted in a bin connector part of the connector. It is configured as follows.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a schematic diagram of the configuration of an embodiment of the present invention, Figure 2 (a)
, (b) are a front view and a side view, respectively, of the Eva chip mounting connector of FIG. 1.

The input and output of the application set 8 and the EV chip are directly connected through the bin of the EV chip mounting connector 1.

Further, the input/output between the evaluation chip and the emulation board is connected via a cable 2.

As a result, a normal signal on the system is inputted to the amplifier built in the evaluation chip 7 without being affected by noise.

Therefore, the evaluation chip 7 can perform accurate evaluation including the built-in amplifier.

〔Effect of the invention〕

As explained above, the present invention can be implemented by mounting an evaluation chip for microprocessor software development on the application set side connector of the connection cable between the application set and the emulation board. This has the effect that software can be developed in the same environment, and that defects in the internal input signal amplifier will not be discovered after the software is completed.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 2 (a
), (b) are - front and side views of the EV chip mounting connector shown in FIG.・Connection cable, 3... Emulation board, 5... Controller, 6... Pin, 7... Eva chip, 12... External amplifier circuit, 1
5... Emulation board.

Claims (1)

[Claims] An emulator for software development and debugging that includes an evaluation chip and a cable that connects an application set and an emulation board using a connector, wherein the evaluation chip is mounted on a pin connector part of the connector. .