Functional Differences Among FX3S, SD3 and SD2 and Their Reference Designs - KBA222518

Version: **

 

Question:

What are the functional differences among FX3S, SD3, and SD2 and their reference designs?

 

Answer:

FX3S, SD3, and SD2 supports two storage cards. However, these devices have variants that support only one storage card too.

 

Product Name

Part Number

USB 3.0

USB 2.0

P-Port

Datasheet

FX3S

CYUSB3035

Yes

Yes

Yes

http://www.cypress.com/products/ez-usb-fx3s

SD3

CYUSB3025

Yes

Yes

No

http://www.cypress.com/products/ez-usb-sd3

SD2

CYUSB2025

No

Yes

No

http://www.cypress.com/part/cyusb2025-bzxi

 

There are two FX3S-based reference designs available in the Kits section here. Because SD3 and SD2 are the variants of FX3S, you can refer to the reference designs of FX3S.

 

1. FX3S RAID-on-Chip USB Dongle - The kit uses CYUSB3035 and is used to demonstrate the RAID1 functionality of FX3S. This supports only a 4-bit SD interface on both ports.

 

2. FX3S DVK - The kit uses CYUSB3035 and is used to demonstrate the functionality of FX3S. The kit supports two 8-bit storage ports that can be SD3.0, SDIO3.0, or eMMC 4.41. The kit comes with an 8-bit SD connector. eMMC paddle boards compatible with SD sockets can be used to evaluate eMMC. This also has P-port connector to connect FPGAs or application processors.