Pin Connection; Flmd0 Pin - NEC V850E/RS1 User Manual

Chapter 21 Flash Memory

21.6 Pin Connection

A connector must be mounted on the target system to connect the dedicated flash programmer for on-
board writing.
In addition, a function to switch between the normal operation mode and flash memory programming
mode must be provided on the board.
When the flash memory programming mode is set, all the pins not used for flash memory programming
are in the same status as that immediately after reset. Therefore, all the ports go into an output high-
impedance state, and the pins must be processed correctly if the external device does not recognize
the output high-impedance state.

21.6.1 FLMD0 pin

In the normal operation mode, 0 V is input to the FLMD0 pin. In the flash memory programming mode,
the V write voltage is supplied to the FLMD0 pin. An example of connection of the FLMD0 pin is
DD
shown below.
Figure 21-6: FLMD0 Pin Connection Example
Dedicated flash programmer connection pin
FLMD0
Pull-down resistor (R )
FLMD0
756
User's Manual U16702EE3V2UD00
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