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21. Ordering Information
Part Number
CYW43903KUBG
22. Additional Information
22.1 Acronyms and Abbreviations
In most cases, acronyms and abbreviations are defined upon first use. For a more complete list of acronyms and other terms used in
Cypress documents, go to:
22.2 IoT Resources
Cypress provides a wealth of data at
design, and quickly and effectively integrate the device into your design. Cypress provides customer access to a wide range of
information, including technical documentation, schematic diagrams, product bill of materials, PCB layout information, and software
updates. Customers can acquire technical documentation and software from the Cypress Support Community website
(https://community.cypress.com/)
22.3 Errata
1. The RTC block has been deprecated from this datasheet in revision *A and later. This block is used by Cypress for internal
testing/validation/verification and is not intended for customers to use.
2. The details of the SPI hardware blocks was not available in revision *E and
Note that the SPI hardware blocks can only support a hold time of 25ns and a fixed SPI mode (CPHA=0, CPOL = 0). For slaves that
require higher hold times or a different mode, a bit banging based SPI driver is recommended.
3. The clock for the SPI Flash block needs to be constrained to ~26.67MHz for reliable operation at high operating temperatures.
The throughput of the SPI Flash block is therefore restricted to ~13 MBps for Quad mode and ~3 MBps for single mode
Document Number: 002-14826 Rev. *G
PRELIMINARY
Package
4.91 mm x 5.85 mm, 0.4 mm ball pitch,
151-pin WLBGA
http://www.cypress.com/glossary.
http://www.cypress.com/internet-things-iot
Description
–
to help you to select the right IoT device for your
5.7 SPI
has been added in Revision *F.
CYW43903
Operating
Ambient
Temperature
–30°C to +85°C
Page 63 of 65
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