E1/E20/E2/E2 Lite Additional Document
R20UT1994EJ0900 Rev.9.00
Page 23 of 58
Jan.20.22
Notes:
1
The circuits and resistance values listed are recommended but not guaranteed. Determine the
circuit design and resistance values by taking into account the specifications of the target
device and noise. For flash programming for mass production, perform sufficient evaluation
about whether the specifications of the target device are satisfied.
2
For processing of pins not used by the E1/E20/E2/E2 Lite, refer to the hardware manual for the
device.
3
The recommended circuit for the RESET# pin differs depending on whether the multiplexed
functions are used. For details on how to handle the RESET# pin, also refer to section 2.5,
Notes on Connection.
4
The RESET_IN and RSTPU pins are used only in debugging. The emulator operates for flash
programming by the programming software whether this pin is connected or not.
5
Securely connect pins 2, 12, and 14 of the connection to GND of the user system. These pins
are used for electrical grounding as well as for monitoring of connection with the user system by
the E1/E20/E2/E2 Lite.
6
Securely connect both pin 10 and pin 13.
7
We recommended that you use a diode of the BAT54 series from NXP Semiconductors.
8
When the battery backup function is in use, connect VDD of the 14-pin connector to EVDD of
the target MCU. Do not connect VDD of the target MCU to the 14-pin connector.
Do not disconnect the EVDD power supply while debugging involves the battery backup
function.
9
Depending on the number of pins of the target MCU, VDD and EVDD may be the same pin. In
such cases, connect both VDD and EMVDD of the 14-pin connector to the power pin of the
target MCU.
Do not disconnect this power supply while debugging involves the battery backup function.
