UPD78F9418A NEC, UPD78F9418A Datasheet - Page 259

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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Caution The V
Notes 1. Connect this pin when the system clock is supplied from the dedicated flash programmer.
2. When using UART with Flashpro III, the clock of the resonator connected to the X1 pin must be used,
dedicated flash programmer. When using the power supply connected to the V
voltage before starting programming.
resonator is already connected to the X1 pin, do not connect to the CLK pin.
so do not connect to the CLK pin.
DD
Figure 18-3. Example of Connection with Dedicated Flash Programmer
pin, if already connected to the power supply, must be connected to the VDD pin of the
Dedicated flash programmer
Dedicated flash programmer
Dedicated flash programmer
CLK
(c) Pseudo 3-wire (when P0 is used)
CLK
CLK
Notes 1, 2
RESET
RESET
RESET
VPP1
VPP1
VPP1
Note 1
GND
GND
VDD
VDD
SCK
Note 1
GND
VDD
SCK
SO
SO
SO
User’s Manual U13952EJ3V0UD
SI
SI
SI
(a) 3-wire serial I/O
(b) UART
V
V
RESET
SCK
SI
SO
X1
V
V
V
RESET
R
T
X1
V
V
V
RESET
P00 (serial clock)
P02 (serial input)
P01 (serial output)
X1
V
X
PP
DD0
SS0
PP
DD0
SS0
X
PP
DD0
SS0
D
D
, V
, V
, V
, V
, V
, V
µ
µ
µ
SS1
SS1
DD1
DD1
PD78F9418A
PD78F9418A
DD1
SS1
PD78F9418A
DD
pin, supply
If a
259