UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 264

• Manufacturer Part Number: UPD78F9418AGK-9EU
• Manufacturer: Renesas Electronics America

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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(1)
(2)
Signal conflict
Malfunction of another device
A signal conflict occurs if the dedicated flash programmer (output) is connected to a serial interface pin
(input) connected to another device (output). To prevent this signal conflict, isolate the connection with the
other device or put the other device in the output high impedance status.
When the dedicated flash programmer (output or input) is connected to a serial interface pin (input or output)
connected to another device (input), a signal may be output to the device, causing a malfunction. To prevent
such malfunction, isolate the connection with other device or set so that the input signal to the device is
ignored.
PD78F9418A
PD78F9418A
PD78F9418A
Input pin
Pin
Pin
Figure 18-5. Signal Conflict (Serial Interface Input Pin)
If the signal output by the PD78F9418A affects another device in the
flash memory programming mode, isolate the signal on the device side.
If the signal output by the dedicated flash programmer affects another
device, isolate the signal on the device side.
Figure 18-6. Malfunction of Another Device
Signal conflict
CHAPTER 18
User’s Manual U13952EJ3V1UD
In the flash memory programming mode, the signal
output by another device and the signal sent by the
dedicated flash programmer conflict. To prevent this,
isolate the signal on the device side.
Other device
Other device
PD78F9418A
Connection pin of dedicated flash
programmer
Connection pin of dedicated flash
programmer
Connection pin of dedicated flash
programmer
Other device
Input pin
Input pin
Output pin