Power Supply And Ground Patterns - Renesas RZ/A Series Manuallines

RZ/A1

3. Power Supply and Ground Patterns

Notes on designing power supply and ground patterns are described below.
• Power supplies and ground patterns should be separated into digital and analog. Table 3.1 and Table 3.2
show the power supply and ground classifications.
Table 3.1 Classification of USB power supply
Pin Name
USBAVcc
USBDVcc*
1
USBUVcc*
1
USBAPVcc
USBDPVcc*
1
Vcc
PVcc
Notes: ✔: Indicates the power supply used.
*1. Does not exist in BGA package.
*2. USBDVcc, USBUVcc, and Vcc are connected internally in the LSI.
*3. USBDPVcc and PVcc are connected internally in the LSI.
Table 3.2 Classification of USB ground
Pin Name/USB
Connector
USBAVss*
1
USBDVss*
1
USBUVss*
1
USBAPVss*
1
USBDPVss*
1
Vss
USB connector ground
(Includes frame ground)
Notes: ✔: Indicates the ground used.
*1. Does not exist in BGA package.
*2. USBDPVss, USBDVss, USBUVss, and Vss are connected internally in the LSI.
R01AN5119EJ0120 Rev.1.20
May.26.20
Guidelines for High-Speed USB2.0 Board Design
Classification of Power Supply
Analog Power Digital Power
Supply (1.2 V) Supply (1.2 V)
✔
✔*
✔*
✔*
Classification of Ground
Analog Ground (AGND)
Symbol:
✔
✔
Analog Power
Supply (3.3 V)
2
2
✔
2
Digital Ground (DGND)
Symbol:
✔* 2
✔* 2
✔* 2
✔* 2
✔
Digital Power
Supply (3.3 V)
✔* 3
3
✔*
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