28 pins are present on the high power RF circuit board.An Evaluation board with the Transceiver; 802.11 b/g (Wi-Fi, WiFi, WLAN) RF type.The RF Board that you are looking at comes from our well-known ZNEO™ series product line.
Z16F28WF100MODG Features
28 pins Transceiver; 802.11 b/g (Wi-Fi, WiFi, WLAN) Type
Z16F28WF100MODG Applications
There are a lot of Zilog Z16F28WF100MODG RF Boards applications.