UPD78F0411GA-GAM-AX Datasheet, PDF (515/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 24 FLASH MEMORY
24.5 Connection of Pins on Board
To write the flash memory on-board, connectors that connect the dedicated flash memory 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 handled as described below.
24.5.1 FLMD0 pin
In the normal operation mode, 0 V is input to the FLMD0 pin. In the flash memory programming mode, the VDD
write voltage is supplied to the FLMD0 pin. An FLMD0 pin connection example is shown below.
Figure 24-5. FLMD0 Pin Connection Example
78K0/LC3
FLMD0
Dedicated flash memory programmer
connection pin
10 kΩ (recommended)
24.5.2 Serial interface pins
The pins used by each serial interface are listed below.
Table 24-4. Pins Used by Each Serial Interface
Serial Interface
UART6
Pins Used
TxD6, RxD6
To connect the dedicated flash memory programmer to the pins of a serial interface that is connected to another
device on the board, care must be exercised so that signals do not collide or that the other device does not
malfunction.
User’s Manual U18698EJ1V0UD
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