NEC 78K0 Series User Manual page 562

Examples of the recommended connection when using the adapter for flash memory writing are shown below.
Figure 26-3. Example of Wiring Adapter for Flash Memory Writing in 3-Wire Serial I/O (CSI10) Mode
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CHAPTER 26 FLASH MEMORY
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
GND
VDD
VDD2
SI SO SCK CLK
WRITER INTERFACE
Preliminary User's Manual U17260EJ3V1UD
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/RESET FLMD0
V (2.7 to 5.5 V)
DD
GND