NEC V850ES/KE1+ User Manual page 643

(3) 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 another device
on-board, care should be taken to avoid conflict of signals and malfunction of the other device.
(a) Conflict of signals
When the dedicated flash programmer (output) is connected to a serial interface pin (input) that is
connected to another device (output), a 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.
Figure 26-12. Conflict of Signals (Serial Interface Input Pin)
V850ES/KE1+
Input pin
CHAPTER 26 FLASH MEMORY
Table 26-9. Pins Used by Serial Interfaces
Serial Interface
UART0
CSI00
CSI00 + HS
Conflict of signals
In the flash memory programming mode, the signal that the dedicated flash
programmer sends out conflicts with signals another device outputs.
Therefore, isolate the signals on the other device side.
User's Manual U16896EJ2V0UD
Pins Used
TXD0, RXD0
SO00, SI00, SCK00
SO00, SI00, SCK00, PCM0
Dedicated flash programmer
connection pins
Other device
Output pin
643