E1 Datasheet, PDF (35/50 Pages) Renesas Technology Corp – E1/E20 Emulator

E1/E20 Emulator
Designing the User System
2.5.12. About GND
The pins of the connector marked "GND" must be at the same ground level as the VSS pin of the MCU.
2.5.13. About 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 1.8V to 5.5V and within the operating voltage range of the
MCU.
When power is supplied to the user system from other than the emulator, E1/E20 emulator consumes the power
supply for the last output and first input buffers of the emulator.
E1 emulator
E20 emulator
: 3.3V approximately 20mA , 5.0V approximately 40mA
: 3.3V approximately 40mA , 5.0V approximately 100mA
The E1 emulator can supply power to a simple evaluation system. Up to 200 mA current can be supplied.
When using the power supply function of the E1 emulator, check the voltage supplied to the user system.
Particularly, when the 5.0V supply option is selected, the voltage may drop 0.5V or more since it depends on the
USB VBUS power supply voltage.
Power supply from the E1 emulator 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 E1 emulator. Use a stable, separate power supply for the user system. When writing a program for
mass production processes, use the Flash Development Toolkit or the Renesas Flash Programmer.
For details on the programming software, refer to
http://www.renesas.com/products/tools/flash_prom_programming/ .
Since the internal debugging circuit is operating, when the MCU is changed to low power consumption modes,
the electric current consumption values increase than DC Characteristics of the MCU.
WARNING
Warning for Turning the Power On/Off:
When supplying power, ensure that there are no shorts between Vcc and GND. Only connect the E1
or E20 after confirming that there are no mismatches of alignment on the user system port connector.
Incorrect connection will result in the host machine, the emulator, and the user system emitting smoke
or catching fire.
R20UT0399EJ0700 Rev.7.00
Feb 01, 2014
Page 35 of 50