NEC PD78F9488 User Manual
Page 322
CHAPTER 19 FLASH MEMORY VERSION
322
User’s Manual U15331EJ4V1UD
Figure 19-3. Example of Connection with Dedicated Flash Programmer
(a) 3-wire serial I/O
Dedicated flash programmer
VPP1
VDD
RESET
SCK
SO
SI
CLK
Note 1
GND
V
PP
V
DD
RESET
SCK20
SI20
SO20
X1
V
SS
PD78F9488
PD78F9489
µ
µ
(b) 3-wire serial I/O with handshake
VPP1
VDD
RESET
SCK
SO
SI
HS
GND
V
PP
V
DD
RESET
SCK20
SI20
SO20
P11 (HS)
CLK
Note 1
X1
V
SS
Dedicated flash programmer
PD78F9488
PD78F9489
µ
µ
µ
µ
(c) UART
VPP1
VDD
RESET
SO
SI
CLK
Notes 1, 2
GND
V
PP
V
DD
RESET
R
X
D20
T
X
D20
X1
V
SS
Dedicated flash programmer
PD78F9488
PD78F9489
µ
µ
Notes 1. When the system clock is supplied from the dedicated flash programmer, connect the CLK pin with X1
pin and disconnect the on-board resonator. When using the clock of the on-board resonator, do not
connect the CLK pin.
2. When using UART with Flashpro III, the clock of the resonator connected to the X1 pin must be used, do
not connect the CLK pin.
Caution The
V
DD
pin, if already connected to the power supply, must be connected to the VDD pin of the
dedicated flash programmer. Before using the power supply connected to the V
DD
pin, supply
voltage before starting programming.