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E2/E2 Lite
2.5.4
GND
The pins of the connector marked "GND" must be at the same ground level as the VSS pin of the MCU.
2.5.5
VCC
Connect the VCC of the connector to the VCC (power supply) of the user system.
Use the emulator within the power supply voltage of 1.8 V to 5.5 V and within the operating voltage range of
the MCU.
When power is supplied to the user system from other than the emulator, the E2/E2 Lite consumes the
power supply for the last output and first input buffers of the emulator.
•
E2: 3.3 V: approximately 20 mA, 5.0 V: approximately 40 mA
•
E2 Lite: 3.3 V: approximately 20 mA, 5.0 V: approximately 40 mA
The E2/E2 Lite can supply power to a simple evaluation system.
•
E2: Can supply power of 1.8 V to 5.0 V, up to 200 mA.
•
E2 Lite: Can supply power of 3.3 V, up to 200 mA.
When using the power supply function of the E2 or E2 Lite, check the voltage that is actually being supplied
to the user system since this depends on the environment.
Power supply from the E2/E2 Lite depends on the quality of the USB power supply of the host machine, and as
such, precision is not guaranteed. When writing a program that requires reliability, do not use the power supply
function of the E2/E2 Lite. Use a stable, separate power supply for the user system. As the software when
writing a program in a mass-production process, use the Renesas Flash Programmer.
For details on the programming software, refer to the following:
Renesas Flash Programmer:
When the MCU is changed to low power mode, the internal debugging circuit continues to run. This leads to the
MCU drawing more electric current than is listed in the DC characteristics of the target MCU.
Warning for Turning the Power On/Off:
When supplying power, ensure that there are no shorts between Vcc and GND. Only connect the
E2/E2 Lite after confirming that there are no mismatches of alignment on the user system port
connector. Incorrect connection will result in the host machine, the E2/E2 Lite, and the user system
emitting smoke or catching fire.
2.5.6
TxD9 and RxD9 Pins (Flash Programming via an SCI)
When flash memory is programmed via an SCI, the RxD9 and TxD9 pins must be connected to the emulator.
If the MCU has multiple RxD9 or TxD9 pins, check the hardware manual of the MCU to confirm which of the
pins is used in boot mode.
R20UT4582EJ0100 Rev.1.00
Jul.16.19
https://www.renesas.com/RFP
WARNING
Designing the User System
Page 15 of 30
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