Flash Programming Circuitry; Figure 20-3: Application Example For Flash Selfprogramming - NEC V850E/CA1 ATOMIC Preliminary User's Manual

20.5 Flash Programming Circuitry

The following schematic shows the minimal circuitry, that is needed for the µPD70F3123. The circuitry
incorporates a low-dropout voltage regulator (µPC29S78) as well as flash writer support. If the device is
not used for Selfprogramming the V
ground and the voltage regulator (µPC29S78) can be removed.

Figure 20-3: Application Example for Flash Selfprogramming

+5 V
V
IN
GND
+5 V
5 x C
VDD5
574
Chapter 20 Flash Memory (µPD70F3123)
/V
PP0 PP1
D1
µPC29S78
1
4
2 3
V
DD50
V
DD51
V
DD52
V
DD53
V
DD54
µPD76F3123
V
SS50
V
SS51
V
SS52
V
SS53
V
SS54
V
SS55
C
X
Preliminary User's Manual U14913EE1V0UM00
pins have to be connected via a pull down resistor to
D2
+
SCK0
RESET
V
V
V
CV
CV
V
V
V
C
+ 5 V
X
Flash
Master
Cable 1
Pin6/V
Pin7/SCK
SI0 Pin5/SO
SO0 Pin3/SI
Pin2/RESET
DD30
DD31
3 x C
DD32
DD
C
CVDD
SS
SS30
SS31
SS32
PP
Reset
generator
VDD3