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<R>
(Not communicating by using the OCD1A and OCD1B pins or using the X1 oscillator)
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. Circuits other than the X1 oscillator can be used to generate the clock signal for the target device during
on-chip debugging.
3. The name of the pin shared with OCD1A (OCD1B) might be invalid or might not exist depending on the
device.
For details, see the user's manual for the target device.
During on-chip debugging, the settings specified by the user program are ignored, because these pins are
used as pins dedicated to on-chip debugging. However, if the pins are specified as input pins, the pins
must be processed (because they are left open when MINICUBE2 is not connected.)
4. This connection is designed assuming that the RESET signal is output from the N-ch open-drain buffer
(output resistance: 100 Ω or less).
5. The circuit enclosed by a dashed line is designed for flash self programming, which controls the FLMD0 pin
via ports.
When not using flash self programming, process the pins according to the device specifications.
6. 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.
60
CHAPTER
4
HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
Figure 4-6.
When Both Debugging and Programming Are Performed
V
1
GND
2
3
Note 1
RxD
V
DD
4
V
DD
5
Note 1
TxD
6
R.F.U.
7
R.F.U.
10 kΩ
8
8
8
R.F.U.
9
Note 2
CLK
10
R.F.U.
11
R.F.U.
12
R.F.U.
13
DATA
14
FLMD0
15
Note 4
16
R.F.U.
User's Manual
DD
Note 6
3 k to 10 kΩ
1 k to
Note 6
10 kΩ
V
DD
1 k to
Note 6
10 kΩ
3 k to
Note 6
10 kΩ
V
1 kΩ
10 kΩ
DD
Note 5
Note 4
1 kΩ
For details, refer to 4.1.3
Connection of reset pin.
U18371EJ5V0UM
V
DD
Target device
V
DD
RESET
TxD
RxD
Note 3
OCD1A
OCD0A(X1)
1 k to
OCD0B(X2)
10 kΩ
Note 3
OCD1B
FLMD0
Port X
GND
Reset connector
RESET
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