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26.6 Connection of Pins on Board
To write the flash memory on-board, connectors that connect the dedicated flash programmer must be provided on
the target system. First provide a function that selects the normal operation mode or flash memory programming
mode on the board.
When the flash memory programming mode is set, all the pins not used for programming the flash memory are in
the same status as immediately after reset. Therefore, if the external device does not recognize the state immediately
after reset, the pins must be connected as described below.
26.6.1 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 FLMD0 pin connection example is shown below.
26.6.2 FLMD1 pin
When 0 V is input to the FLMD0 pin, the FLMD1 pin does not function. When V
the flash memory programming mode is entered, so the same voltage as V
FLMD1 pin connection example is shown below.
78K0/KE1+
FLMD1
CHAPTER 26 FLASH MEMORY
Figure 26-10. FLMD0 Pin Connection Example
78K0/KE1+
Dedicated flash programmer connection pin
FLMD0
Figure 26-11. FLMD1 Pin Connection Example
Signal collision
If the V
signal is input to the FLMD1 pin from another device during
DD
on-board programming and immediately after reset, isolate this signal.
User's Manual U16899EJ2V0UD
DD
must be supplied to the FLMD1 pin. An
SS
Dedicated flash programmer
connection pin
Other device
Output pin
is supplied to the FLMD0 pin,
439
DD
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