Datasheet

CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ3V0UD
230
Set oscillation fre
q
uenc
y
Click
Figure 16-5. PG-FP5 Programming GUI Setting Example
Table 16-4. Oscillation Frequency and PG-FP5 Programming GUI Setting Value Example
Oscillation Frequency
PG-FP5 GUI Software Setting Value Example
(Communication Frequency)
2 MHz ≤ fX < 4 MHz 8 MHz
4 MHz ≤ fX < 8 MHz 9 MHz
8 MHz ≤ fX < 9 MHz 10 MHz
9 MHz ≤ fX ≤ 10 MHz 8 MHz
Caution The above values are recommended values. Depending on the usage environment these
values may change, so set them after having performed sufficient evaluations.
16.6.2 EXCLK pin (
μ PD78F950x)
The EXCLK pin is used as the serial interface of flash memory programming. Therefore, if the EXCLK pin is
connected to an external device, a signal conflict occurs. To prevent the conflict of signals, isolate the connection with
the external device.
When connected a capacitor to the EXCLK pin, waveform at the time of communication is changed. Therefore
there is a possibility that cannot communicate depending on capacitor capacitance. When perform flash memory
programming, isolate connection with a condenser.
(Main window)
(Standard tab in Device setup window)
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