Download datasheet: pdf

CHAPTER
5.1.5
5
HOW TO USE MINICUBE2 WITH 78K0S MICROCONTROLLER
Connection of X1 and X2 pins
The X1 and X2 pins are used when the debugger is started for the first time (when downloading the monitor
program) and when programming is performed with the QB-Programmer.
Design circuits appropriately according
to the relevant case among the cases shown below.
(1) X1 and X2 pins are not used in target system
→ See Figure 5-10.
(2) X1 and X2 pins are used in target system
→ See Figure 5-11 and 5.2.6
Debugging of alternate-functions of X1 and X2 pins.
Figure 5-10. Circuit Connection for the Case Where X1 and X2 Pins Are Not Used in Target System
VDD
Target device
Target connector
3 to 10 kΩ
X2
X1
3
X2
9
X1
1 to 10 kΩ
Figure 5-11. Circuit Connection for the Case Where X1 and X2 Pins Are Used in Target System
Target connector
X2
X1
Target device
3
X2
9
X1
Jumper
Oscillator or
external device
* Jumper setting
When debugger is started for the first time
(downloading the monitor program) or when
Remark
programming is performed with QB-Programmer:
1-2 shorted
Other than above:
2-3 shorted
Refer to the pin connection in Figure 5-10 when the X1 or X2 pin is not used.
User’s Manual U18371EJ1V0UM
109