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CHAPTER 6
6.1.2 Circuit connection example
Refer to Figure 6-2 and design an appropriate circuit.
Caution The constants described in the circuit connection example are reference values. If you perform
flash programming aiming at mass production, thoroughly evaluate whether the specifications of
the target device are satisfied.
Target connector
Target connector
1
1
GND
GND
2
2
RESET_OUT
RESET_OUT
3
3
Note 1
Note 1
RXD
RXD
4
4
VDD
VDD
5
5
Note 1
Note 1
TXD
TXD
6
6
R.F.U.
R.F.U.
7
7
R.F.U.
R.F.U.
8
8
R.F.U.
R.F.U.
9
9
R.F.U.
R.F.U.
10
10
R.F.U.
R.F.U.
11
11
R.F.U.
R.F.U.
12
12
R.F.U.
R.F.U.
13
13
R.F.U.
R.F.U.
14
14
FLMD0
FLMD0
15
15
RESET_IN
RESET_IN
Note 3
Note 3
16
16
CLK_IN
CLK_IN
Notes 1. With MINICUBE2, the circuit enclosed by a dashed line is not necessary because the RXD and
TXD pins are internally shorted. If any other flash programmer is used, these pins must be shorted
on the target system because these pins may not be able to be shorted in the programmer.
2. This connection is required for 2-wire communication, but not for 1-wire communication. This pin
is left open when MINICUBE2 is not connected, so connect a pull-up or pull-down resistor to this
pin before using.
3. This connection is designed assuming that the RESET signal is output from the N-ch open-drain
buffer (output resistance: 100Ω or less). For details, refer to 6.1.3 Connection of reset pin.
4. The circuit enclosed by a dashed line is not required when only flash programming is performed.
136
HOW TO USE MINICUBE2 WITH 78K0R MICROCONTROLLER
Figure 6-2. Recommended Circuit Connection
V
V
DD
DD
3 to 10 kΩ
3 to 10 kΩ
Note 4
Note 4
10 kΩ
10 kΩ
1 kΩ
1 kΩ
User's Manual U18371EJ1V0UM
V
V
V
V
DD
DD
DD
DD
V
V
DD
DD
0 to 10 kΩ
0 to 10 kΩ
V
V
DD
DD
Target device
Target device
GND
GND
_RESET
_RESET
TOOL0
TOOL0
VDD
VDD
X1
X1
Clock
Clock
circuit
circuit
X2
X2
TOOL1
TOOL1
Note 2
Note 2
FLMD0
FLMD0
Reset circuit
Reset circuit
RESET signal
RESET signal
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