Renesas e1 User Manual

E1/E20/E2/E2 Lite Additional Document 3. Notes on Usage
R20UT2937EJ0301 Rev.3.01 Page 42 of 45
Jul 1, 2020
3.9.5 Software Break Functions
The RL78-S1 core device does not have the software break function. The hardware break function can
be used alternatively but a break will occur several instructions after the breakpoint because the
hardware break function generates a break after execution of the instruction at the breakpoint. Note that
if a branch occurs between the breakpoint and the point where program execution stops, the break
appears to have not occurred at the breakpoint in some cases.
3.9.6 Extended Functions of the E2
3.9.6.1 Solution for the Tuning of Current Consumption
For notes on the solution for the tuning of current consumption, refer to the application note.
3.9.6.2 External Trigger Input and Output
• Use the value of the high-level voltage which can be input to the external trigger input in accordance
with the value that has been set for the power-supply voltage of the E2 expansion interface.
• The value of the high-level voltage which is output on the external trigger outputs depends on the
value that has been set for the power-supply voltage of the E2 expansion interface.
• When a break is detected and a low or high pulse is output with the external trigger output function,
output of the pulse lags behind stopping of the program by a time between over a hundred
microseconds and hundreds of milliseconds.
The time lag is up to 80 ms when the operating frequency is 1.25 MHz.

Renesas e1 Specifications

General

Host Interface	USB
On-Chip Debugging	Yes
Manufacturer	Renesas Electronics
Product Category	Debug Emulators
Target MCU Family	Renesas MCUs
Programming	Supported
Power Supply	USB
Category	Emulators
Supported Devices	Renesas MCUs

Summary

General Precautions in the Handling of Microprocessing Unit and Microcontroller Unit Products

1. Overview

1.1 Overview of E1/E20/E2 Emulator and E2 Lite

Introduces the E1, E20, E2, and E2 Lite emulators and their primary functions as debugging tools.

1.4 Supported RL78 Devices

Details the specific RL78 family MCUs supported by the emulators, including RL78/G1x series.

1.5 External Trigger I/O Specifications

2. Designing the User System

2.1 Connecting Emulators to User System

Guides on establishing the physical connection between the emulators and the user system.

2.2 User System Connector Installation

2.3 14-Pin Connector Specifications

Details the specifications and pinout of the standard 14-pin connector used for system connection.

2.4 Recommended Connection Circuits

Shows recommended circuit designs for connecting the 14-pin connector to RL78 family MCUs.

2.5 Notes on Connection

Offers important guidelines and considerations for making reliable connections between the emulator and the MCU.

2.5.1 RESET# Pin Handling

2.5.3 GND and 2.5.4 VDD Connections

2.7 User System Design Notes

3. Notes on Usage

3.1 Turning Power On/Off

Provides step-by-step procedures for safely powering the emulators and the user system on and off.

3.1.2 Emulator-Supplied Power to User System

Details the process and considerations when the emulator supplies power to the user system.

3.2 Emulator Power Supply Function

Explains the voltage supply capabilities of the E1/E2/E2 Lite emulators and associated voltage drops.

3.3 MCU Resource Occupation for Debugging

3.3.4 Security ID Setting

3.8 Final User Program Evaluation

3.9 Debug Functions

Covers various debugging functions like step execution, breakpoints, and standby mode debugging.

3.9.6 Extended Functions of the E2