Data Sheet
Table Of Contents
- 1 Design guidelines
- 2 Ordering Information
- 3 Pinout and Terminal Descriptions
- 4 Packaging
- 5 Power control
- 6 Interfaces
- 7 Block diagram
- 8 Example schematics
- 9 802.11 Radio
- 10 Firmware
- 11 Host interfaces
- 12 Electrical characteristics
- 13 RF Characteristics
- 14 Physical dimensions
- 15 Layout guidelines
- 16 Soldering recommendations
- 17 Certifications
- 18 Qualified Antenna Types for WF121-E
Silicon Labs
VERSION HISTORY
Version Comment
1.0 First version
1.1 FCC and IC information added
1.2 WF121-N layout guide
1.3
Added power consumption measurements, regulatory info and some
corrections
1.4
Added unassociated idle consumption and a chapter about power saving
modes
1.4.1 Added CE information
1.4.2 Removed details from the regulatory info
1.4.3 Corrected typos in the pad function tables
1.4.4 Reduced the list of supported coexistence schemes
1.4.5 Added links to Microchip reference guide, some notes on the coexistence
1.4.6 Added inversion notices to RTS/CTS for unambiguity
1.4.7
Added notes on the USB data pins GPIO use being input only to pin function
table
1.4.8 Added note on the engineering sample order codes
1.4.9 Additions to power supply description, rewrote power consumption section
1.4.10 Removed references to parallel port and C-libraries
1.4.11 Added recommendations for unconnected GPIO pins
1.4.12 Added notes on Ethernet PHY, various small edits
1.5 Design guidelines, supply voltage limitations
1.5.1 Fixed typos & support/sales contact information
1.5.2 CE info updated
1.5.3 Added possibility for different crystal frequencies