Serial Interface Pin - NEC Renesas V850/SC1 User Manual

17.5.2 Serial interface pin

The following shows the pins used by each serial interface.
When connecting a dedicated flash programmer to a serial interface pin that is connected to other devices on-
board, care should be taken to avoid the conflict of signals and the malfunction of other devices, etc.
(1) Conflict of signals
When connecting a dedicated flash programmer (output) to a serial interface pin (input) that 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 output high-impedance status.
V850/SC1, V850/SC2,
V850/SC3
Input pin
FLASH MEMORY ( µ µ µ µ PD70F3089Y)
CHAPTER 17
Table 17-3. Pins Used by Serial Interfaces
Serial Interface
CSI0
CSI0 + HS
UART0
Figure 17-7. Conflict of Signals (Serial Interface Input Pin)
Conflict of signals
In the flash memory programming mode, the signal that the
dedicated flash programmer sends out conflicts with signals
the other device outputs. Therefore, isolate the signals on the
other device side.
User's Manual U15109EJ3V0UD
Pins Used
SO0, SI0, SCK0
SO0, SI0, SCK0, P15
TXD0, RXD0
Dedicated flash programmer connection pins
Other device
Output pin
501