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User’s Manual U11969EJ3V0UM00
CHAPTER 14 FLASH MEMORY (
µ
PD70F3008 AND 70F3008Y ONLY)
14.5.2 Serial interface pin
The following shows the pins used by each serial interface.
Serial Interface
Pins Used
CSI0
SO0, SI0, SCK0
UART
TXD, RXD
When connecting a dedicated flash writer to a serial interface pin which is connected to other devices on-board,
care should be taken to the conflict of signals and the malfunction of other devices, etc.
(1) Conflict of signals
When connecting a dedicated flash writer (output) to a serial interface pin (input) which is connected to another
device (output), conflict of signals occurs. To avoid the conflict of signals, isolate the connection to the other
device or set the other device to the high-impedance status.
Input pin
Dedicated flash writer connection pin
Conflict of signals
Output pin
The other device
V854
In the flash memory programming mode, the signal that the
dedicated flash writer sends out conflicts with signals the other
device outputs. Therefore, isolate the signals on the other
device side.
Содержание V854 UPD703006
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