NEC MINICUBE2, Руководство пользователя

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CHAPTER 4 HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
User’s Manual U18371EJ1V0UM
62
Figure 4-10. When Only Debugging Is Performed (with OCD1A/OCD1B Communication)
3
4
5
6
RESET_IN Note 1
RESET_OUT
FLMD0
V
DD
DATA
GND
CLK
Note 3
GND
R.F.U.
R.F.U.
_RESET
FLMD0
V
DD
Port X
1 k
Ω
OCD1B
Note 2
OCD1A
Note 2
7
8
9
10
GND
1
2
10 k
Ω
Target connector
Target device
RESET signal
Reset connector
1 k Ω
Note 4
1 to 10 k
Ω
V
DD
V
DD
V
DD
10 k
Ω
V
DD
3 to
10 k
Ω
3
4
5
6
RESET_IN Note 1
RESET_OUT
FLMD0
V
DD
DATA
GND
CLK
Note 3
GND
R.F.U.
R.F.U.
_RESET
FLMD0
V
DD
Port X
1 k
Ω
OCD1B
Note 2
OCD1A
Note 2
7
8
9
10
GND
1
2
10 k
Ω
Target connector
Target device
RESET signal
Reset connector
1 k Ω
Note 4
1 to 10 k
Ω
V
DD
V
DD
V
DD
10 k
Ω
V
DD
3 to
10 k
Ω
Notes 1. This connection is designed assuming that the RESET signal is output from the N-ch open-drain buffer
(output resistance: 100
Ω
or less). For details, refer to 4.1.3 Connection of reset pin .
2. OCD1A (OCD1B) may be a different name, such as P31, depending on the device used. Check the pin
name with the user
'
s manual for the target device. Since this pin is dedicated to debugging during
debugging, port settings made by the user program are ignored. If this pin is assigned to an input port,
the pin must be connected as shown in this figure, because it is open when MINICUBE2 is not connected.
3. During debugging, the clock mounted on the 78K0-OCD board can be supplied. If no clock is mounted, a
clock of 4, 8, or 16 MHz can be supplied (neither of them is used for the CPU operating clock).
4. The circuit enclosed by a dashed line is designed for flash self programming, which controls the FLMD0 pin
via ports. Use the port for inputting or outputting the high level. When flash self programming is not
performed, a pull-down resistance for the FLMD0 pin can be within 1 to 10 k
Ω
.