Connection Of Reset Pin - Renesas QB-MINI2 User Manual

4.1.3

Connection of reset pin

This section describes the connection of the reset pin, for which special attention must be paid, in circuit
connection examples shown in the previous section.
During on-chip debugging, a reset signal from the target system is input to MINICUBE2, masked, and then
output to the target device.
connected.
For flash programming, the circuit must be designed so that the reset signals of the target system and
MINICUBE2 do not conflict.
Select one of the following methods and connect the reset signal in the circuit.
described on the following pages.
(1) Automatically switching the reset signal via resistor (recommended; described in recommended circuit
connection in the previous section)
(2) Automatically switching the reset signal via selector logic
(3) Manually switching the reset signal with jumper
(4) Resetting the target device by power-on clear (POC) only
Caution Do not connect a capacitor to the RESET_OUT pin.
<R>
<R>
If a capacitance element such as a capacitor or resistor is
connected to the RESET_OUT pin, the target device might not
be able to communicate with MINICUBE2.
If necessary, connect a capacitor to the RESET_IN pin.
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CHAPTER 4 HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
Therefore, the reset signal connection varies depending on whether MINICUBE2 is
Figure 4-14.
MINICUBE2
RESET_OUT
RESET_IN
User's Manual
Cautions for using the RESET-OUT pin
Target device
RESET
U18371EJ5V0UM
The details of each method are
Reset connector
V
DD
V
DD
Buffer