PRELIMINARY
CYW54907
21. Ordering Information
Operating Ambient
Part Number
Package
4.583 mm x 5.533 mm, 316-pin WLCSP
Description
Temperature
CYW54907KWBG
–
–30°C to +85°C
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: http://www.cypress.com/glossary.
22.2 References
The references in this section may be used in conjunction with this document.
Note: Cypress provides customer access to technical documentation and software through its Customer Support Portal (CSP) and
Downloads and Support site (see IoT Resources).
Document (or Item) Name
1. USB 2.0 specification
Number
Source
Wiced-smart
Wiced-smart
–
–
2. USB 1.1 Specification
22.3 IoT Resources
Cypress provides a wealth of data at http://www.cypress.com/internet-things-iot to help you to select the right IoT device for your
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/)
22.4 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 were missing from this datasheet till revision *A. Revision *B adds this in section 5.12.
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: 002-19312 Rev. *C
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