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Please answer below.
The same question is written in English and Japanese.
※PSoC 4100S and PSoC 4100S Plus: PSoC 4 Architecture TRM, Document No. 002-10621 Rev. *G 21
・English
It is described as "VDDD and VDDA should be shorted externally.
"In the PSoC4100SP, can you not set “VDDA (5.0 V) ≠ VDDD (3.3 V)”?
・Japanese(日本語)
"VDDD and VDDA should be shorted externally."と記載されています。
PSoC4100SPでは、"VDDA(5.0V) ≠ VDDD(3.3V)"といった設定はできないのでしょうか?
Regards,
Solved! Go to Solution.
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The separate power supply (e.g. VDDA=5V, VDDD=3.3V) is acceptable for not only PSoC4100S Plus, but also other PSoC devices.
This is for better analog performance in a mixed-signal circuit design. In this case, we have to make sure that VDDD ≤ VDDA.
Please see the following documentation.
AN88619 PSoC 4 Hardware Design Considerations Section 4.1 Power Pin Connections
https://www.cypress.com/file/141176/download
and
AN57821 PSoC 3, PSoC 4, and PSoC 5LP Mixed-Signal Circuit Board Layout Considerations Section 5 Multiple Power Domains
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The separate power supply (e.g. VDDA=5V, VDDD=3.3V) is acceptable for not only PSoC4100S Plus, but also other PSoC devices.
This is for better analog performance in a mixed-signal circuit design. In this case, we have to make sure that VDDD ≤ VDDA.
Please see the following documentation.
AN88619 PSoC 4 Hardware Design Considerations Section 4.1 Power Pin Connections
https://www.cypress.com/file/141176/download
and
AN57821 PSoC 3, PSoC 4, and PSoC 5LP Mixed-Signal Circuit Board Layout Considerations Section 5 Multiple Power Domains