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<R>
Target connector
RESET_OUT
RESET_IN
Notes 1. Connect TxD (transmit side) of the target device to RxD (receive side) of the target connector, and TxD
(transmit side) of the target connector to RxD (receive side) of the target device.
2. The X1 oscillator of the target system cannot be used to generate the clock signal for the target device
during on-chip debugging.
Use the clock signal supplied from MINICUBE2. (The clock signal generated by an oscillator provided on
the 78K0-OCD board or a 4, 8, or 16 MHz clock that can be selected as the system clock can also be
used.)
3. Short the jumper pins and disconnect the clock circuit during on-chip debugging.
Leave the jumper pins open and connect the clock circuit when the target device operates (when
MINICUBE2 is not connected) during flash programming.
4. OCD1A may be a different name, such as P31, depending on the device used.
user's manual for the target device.
5. This connection is designed assuming that the RESET signal is output from the N-ch open-drain buffer
(output resistance: 100 Ω or less).
6. The circuit enclosed by a dashed line is designed for flash self programming, which controls the FLMD0 pin
via ports.
Connect any port that can output data to FLMD0 via a resistor.
When not using flash self programming, process the pins according to the device specifications.
7. This is the processing for the pins that are unused (the inputs are left open) when the target device
operates (when MINICUBE2 is not connected).
When changing the resistance, refer to APPENDIX A EQUIVALENT CIRCUIT and make sure that the
change does not affect operation before using the device.
8. To use FLMD1, connect it to FLMD1 of MINICUBE2.
CHAPTER
4
HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
Figure 4-5.
When Both Debugging and Programming Are Performed
(Communicating by using the OCD0A and OCD0B pins or using the X1 oscillator)
1
GND
2
3
Note 1
RxD
V
DD
4
V
DD
5
Note 1
TxD
6
R.F.U.
10 kΩ
7
R.F.U.
8
8
R.F.U.
9
Note 2
CLK
10
R.F.U.
11
R.F.U.
12
FLMD1
13
DATA
14
FLMD0
15
Note 5
16
R.F.U.
1 kΩ
V
DD
Note 7
3 k to 10 kΩ
1k to
Note 7
10 kΩ
Note 3
10 kΩ
V
DD
Note 5
Note 6
For details, refer to 4.1.3
User's Manual
U18371EJ5V0UM
V
DD
Target device
V
DD
RESET
TxD
RxD
FLMD1
OCD0A(X1)
Note 4
OCD1A
OCD0B(X2)
FLMD0
1KΩ
Port X
GND
Reset connector
RESET
For details, refer to the
Connection of reset pin.
1 k to
Note 8
10 kΩ
1 k to
10 kΩ
59
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