NEC switch - Manual (Page 193)

CHAPTER 14 µµµµPD78F9801
User’s Manual U12978EJ3V0UD
193
Figure 14-3. Example of Connection with Dedicated Flash Programmer
(a) 3-wire serial I/O
Dedicated flash programmer
VPP1
VDD
RESET
SCK
SO
SI
CLK Note
GND
V
PP
V DD0 , V DD1
RESET
SCK10
SI10
SO10
X1
V SS0 , V SS1
PD78F9801 µ
(b) Pseudo-3-wire
Dedicated flash programmer
VPP1
VDD
RESET
SCK
SO
SI
GND
V PP
V
DD0
, V
DD1
RESET
P10
P12
P11
CLK Note X1
V SS0 , V SS1
PD78F9801 µ
Note Connect this pin when the system clock is supplied from the dedicated flash programmer. If a resonator is
already connected to the X1 pin, the CLK pin does not need to be connected.
Caution The V
DD
pin, if already connected to the power supply, must be connected to the VDD pin of the
dedicated flash programmer. When using the power supply connected to the V
DD
pin, supply
voltage before starting programming.