CHAPTER 26 FLASH MEMORY
User’s Manual U16896EJ2V0UD
641
26.4.6 Pin connection
When performing on-board writing, mount a connector on the target system to connect to the dedicated flash
programmer. Also, incorporate a function on-board to switch from the normal operation mode to the flash memory
programming mode.
In the flash memory programming mode, all the pins not used for flash memory programming become the same
status as that immediately after reset. Therefore, pin handling is required when the external device does not
acknowledge the status immediately after a reset.
(1) FLMD0 pin
In the normal operation mode, input a voltage of V
SS
level to the FLMD0 pin. In the flash memory
programming mode, supply a write voltage of V
DD
level to the FLMD0 pin.
Because the FLMD0 pin serves as a write protection pin in the self programming mode, a voltage of V
DD
level
must be supplied to the FLMD0 pin via port control, etc., before writing to the flash memory. For details, refer
to
26.5.5 (1) FLMD0 pin
.
Figure 26-10. FLMD0 Pin Connection Example
V850ES/KE1+
FLMD0
Dedicated flash programmer connection pin
Pull-down resistor (R
FLMD0
)