E2 Lite

Setup

R20UT3240EJ0300 Rev.3.00

Page 25 of 36

May.15.20

2.5

Connecting System Ground

The emulator's signal ground is connected to the user system's signal ground.

In the emulator, the signal ground and frame ground are connected.

In the user system, connect the frame ground only; do not connect the signal ground to the frame ground

(Figure 2.5).

If it is difficult to separate the frame ground from the signal ground in the user system, set the GND for DC

power input (AC adapter) of the host machine and the frame ground of the user system as the same

potential. If the GND potential is different between the host machine and the user system, an overcurrent will

flow in the low-impedance GND line and thin lines might be burned.

WARNING

Connecting System Ground :

Separate the frame ground from the signal ground at the user system. Failure to do so will result in

smoke, fire, or an electric shock due to the difference in ground potential.

Figure 2.5 Connecting System Ground

For a debugging environment where there is a difference in potential between the GND of the user system and

that of the host machine, use the isolator (R0E000010ACB10 or R0E000010ACB20) which is separately

available from Renesas.

2.6

Hot plug-in

By using the optional hot-plug adapter for E1 emulators (R0E000010ACB00) which is separately sold, the

hot-plug-in function which connects the E2 Lite to the user system is available while the user system is

supplied with the power and in operation. For information on the hot plug-in-function, be sure to read the

latest version of a user's manual provided for each MCU group.

US B

E2 Lite

Logic

Power

supply

Host machine

Signal ground

Signal ground

Signal

Frame ground

User system

Signal ground

Signal

Logic