ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 61

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
6-7
TECHNOLOGY INC.
6-7-1 Power Architecture
6-7-2 3V Application Circuit
Power
The power architecture of RA8806 is shown as Figure 6-29. VDDP, GNDP are I/O powers and
AVDD, AGND are analog powers for internal ADC. There is an embedded 5V-to-3V DC/DC
Converter which is without any external controlled pin. The application circuits of 5V and 3V system
will be described below.
When RA8806 operates in 3V system, the power consumption will be smaller. The Figure 6-30 is
the example for 3V system. Users need to connect 3V power to VDDP, VDD and AVDD respectively.
The DC/DC Converter is not used, so VDDH needs to be kept floating.
3.3V
VDD
GND
MCU
Figure 6-30: The Power Connection of 3V
VDDH
AVDD
VDDP
I/O
VDD
Figure 6-29 : Power Architecture
10u
3.3V
(Option)
(Option)
0.47uH
0.47uH
61/184
5V
RA8806
Core
ADC
0.1u 0.1u
3V
Two Layers Character/Graphic LCD Controller
0.1u
VDDP
VDD
VDDH
AVDD
MCU I/F
RA8806
GNDP
GND
AGND
AGND
GNDP
GND
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RA8806