Connection Of X1 And X2 Pins - Renesas QB-MINI2 User Manual

CHAPTER
5.1.5

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.
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
Figure 5-10. Circuit Connection for the Case Where X1 and X2 Pins Are Not Used in Target System
Target connector
Figure 5-11. Circuit Connection for the Case Where X1 and X2 Pins Are Used in Target System
Target connector
Remark Refer to the pin connection in Figure 5-10 when the X1 or X2 pin is not used.
114
5 HOW TO USE MINICUBE2 WITH 78K0S MICROCONTROLLER
Debugging of alternate-functions of X1 and X2 pins.
V
DD
3 to 10 k
3
X2
9
X1
Jumper
3 1
X2
2
3
9 1
X1
2
3
* Jumper setting
When debugger is started for the first time
(downloading the monitor program) or when
programming is performed with QB-Programmer:
Other than above:
User's Manual
Design circuits appropriately according
Ω
1 to 10 k
Ω
X2
X1
Oscillator or
external device
1-2 shorted
2-3 shorted
U18371EJ5V0UM
Target device
X2
X1
Target device
External parts