UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 315

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

(1) Signal conflict
(2) Abnormal operation of other device
If the dedicated flash programmer (output) is connected to a serial interface pin (input) that is connected to
another device (output), a signal conflict occurs. To prevent this, isolate the connection with the other device
or set the other device to the output high impedance status.
If the dedicated flash programmer (output or input) is connected to a serial interface pin (input or output) that
is connected to another device (input), a signal is output to the device, and this may cause an abnormal
operation. To prevent this abnormal operation, isolate the connection with the other device or set so that the
input signals to the other device are ignored.
PD78F0988A
PD78F0988A
PD78F0988A
Input pin
Figure 18-7. Signal Conflict (Input Pin of Serial Interface)
Pin
Pin
Figure 18-8. Abnormal Operation of Other Device
In the flash memory programming mode, the signal output by another
device and the signal sent by the dedicated flash programmer conflict,
therefore, isolate the signal of the other device.
If the signal output by the PD78F0988A affects another device in the flash
memory programming mode, isolate the signals of the other device.
If the signal output by the dedicated flash programmer affects another
device in the flash memory programming mode, isolate the signals of the
other device.
Signal conflict
CHAPTER 18
User’s Manual U13029EJ7V1UD
Connection pin of
dedicated flash
programmer
Connection pin of
dedicated flash
programmer
Connection pin of
dedicated flash
programmer
PD78F0988A
Other device
Other device
Other device
Output pin
Input pin
Input pin
313