CHAPTER 2 NAMES AND FUNCTIONS OF COMPONENTS
User’s Manual U14481EJ3V0UM
27
(3) Using the target system crystal oscillator as an external clock
<1> Set JP1 as shown in Table 2-5 (with the default setting).
<2> Set the SW1 and CKSEL pins according to the clock mode to be used, as shown in Table 2-5.
<3> Select “External” in the clock source selection area in the configuration dialog box on the integrated
debugger (ID850).
Table 2-4. Settings When Using External Clock
Type of Clock Used
Clock Source
Selection
OSC Crystal
Oscillator
JP1
Setting
Clock
Mode
SW1 CKSEL
Pin
Note
PLL
Direct
PLL
Low-level
input
Use crystal oscillator on target
system as external clock.
External Crystal
oscillator
can be either
mounted or not
mounted
1
2
7
8
Direct
Direct
PLL
High-level
input
Note
The input setting to the CKSEL pin is made only when a target system is connected.
Leave this pin open when operating the emulator on a stand-alone basis. The emulator operates according
to the setting of SW1.
Caution
Be sure to input a square wave to the X1 pin.
When a clock generated by a crystal/ceramic resonator is used, the IE-703107-MC-EM1 does not
operate.
Figure 2-5. Outline When Using Crystal Oscillator on Target System as External Clock
IE-V850E-MC-A
PD70F3107
1-2 shorted
3-4 shorted
5-6 open
7-8 open
Select
“External”
on ID850
OSC
IE-703107-MC-EM1
SW1
PLL/direct
mode
switching
X1
CKSEL
CLKOUT
Crystal
oscillator
Target system
Emulation
CPU
JP1
µ