Connection Of X1 And X2 Pins - NEC 78K0S/KU1+ User Manual

Figure 17-4. Circuit Connection for the Case Where QB-MINI2 Is Used for Debugging and
Debugging of INTP1 Pin Is Performed Only with Real Machine
Target connector
Caution If debugging is performed with a real machine running, without using QB-MINI2, write the user
program using the QB-Programmer. Programs downloaded by the debugger include the monitor
program, and such a program malfunctions if it is not controlled via QB-MINI2.

17.1.2 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.
Figure 17-5. Circuit Connection for the Case Where X1 and X2 Pins Are Used in Target System
Target connector
270
CHAPTER 17 ON-CHIP DEBUG FUNCTION
V
DD
1 kΩ
1
12
INTP
2
3
* Jumper setting
When debugging with QB-MINI2 connected:
Other than above:
3 1
X2
2
3
1
9
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 U18172EJ2V0UD
Target device
INTP1
External device
I/O to INTP1
1-2 shorted
2-3 shorted
Target device
X2
X1
External components
Oscillator or
external device
1-2 shorted
2-3 shorted