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CHAPTER 16 FLASH MEMORY ( µ µ µ µ PD70F3017 AND 70F3017Y ONLY)
16.5 Pin Connection
When performing on-board writing, install a connector on the target system to connect to the dedicated flash
writer. Also, install the function on-board to switch from the normal operation mode to the flash memory programming
mode.
When switched to the flash memory programming mode, all the pins not used for the flash memory programming
become the same status as that immediately after reset. Therefore, all the ports become output high-impedance
status, so that pin handling is required when the external device does not acknowledge the output high-impedance
status.
16.5.1 V
pin
PP
In the normal operation mode, 0 V is input to V
voltage is supplied to V
pin. The following shows an example of the connection of V
PP
16.5.2 Serial interface pin
The following shows the pins used by each serial interface.
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.
362
PP
V850/SA1
Dedicated flash writer connection pin
V
PP
Pull-down resistor (R
Serial Interface
CSI0
UART0
pin. In the flash memory programming mode, 7.8 V writing
)
VPP
Pins Used
SO0, SI0, SCK0
TXD0, RXD0
pin.
PP
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