857
Power Supply Scheme
Chapter 25
Preliminary User’s Manual U17566EE1V2UM00
25.2 Description
25.2.1
Devices µPD70(F)3420, µPD70(F)3421, µPD70(F)3422,
µPD70F3423
Figure 25-1
gives an overview of the allocation of power supply pins of the
µPD70(F)3420, µPD70(F)3421, µPD70(F)3422, µPD70F3423 devices. Their
functional assignment is depicted in more detail in
Figure 25-2
.
Note
The diagrams do not show the exact pin location.
Figure 25-1
Power supply pins for µPD70(F)3420, µPD70(F)3421, µPD70(F)3422,
µPD70F3423
Figure 25-2
Functional assignment of power supply pins (µPD70(F)3420,
µPD70(F)3421, µPD70(F)3422, µPD70F3423)
ADC
VC
A
V
R
E
F
A
V
D
D
A
V
S
S
S
tandard I
/O
B
V
D
D
5
0
B
V
S
S
5
0
VSS50
n.c.
REGC0
S
M
V
S
S
5
1
S
M
V
D
D
5
1
S
M
V
S
S
5
0
S
M
V
D
D
5
0
VDD52
REGC2
VSS52
VSS51
REGC1
n.c.
BVSS50
BVDD50
Stepper Motor I/O
CPU
RAM
Flash/ROM
ClockGen
Peripherals
POC
Regulator
1
LCD -C/D com/seg / -Bus I/F I/O
DV
DD50
DV
SS50
BV
DD51
BV
SS51
REGC2
REGC1
REGC0
VDD0 (n.c.)
VDD1 (n.c.)
VSS0
VSS1
Core
Peripherals
ClockGen
POC
VDD2
VSS2
BVDD50
BVDD51
BVSS50
BVSS51
DVDD50
DVSS50
Stepper
Motor
Buffer
SMVDD50
SMVDD51
SMVSS50
SMVSS51
ADC
AVDD
AVREF
AVSS
Reg
1
Voltage
Compa-
rators
I/O
Buffer
LCD I/O
Buffer
LCD I/O
Buffer
LCD
voltage
generation
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