CSR Demonstrates Single-Chip Wi-Fi And VoIP Using Unifi-1 Silicon

(Product News, 13 Jul 2005)

CSR plc introduced UniFi-1, its first single-chip Wi-Fi silicon. UniFi-1 is embedded in an SDIO card, plugged into an O2 XDA II smartphone, as well as a cardbus2 card in a laptop PC. Here VoIP can be used through Skype, via Wi-Fi connection from phone to access point and back to a PC. During the Skype demonstration, the XDA II and PC laptop, paired with Bluetooth headset, were connected to the Internet over a Wi-Fi connection to a wide area network (WAN) via an access point (supporting 802.11b/g), enabling users of the two devices to speak freely and hear the conversation clearly.
This demonstration also responded to the issues of coexistence with the other radios found in the handset or PC. It showed that UniFi will not interfere with, or be disrupted by other RF sources.
The single band (2.4GHz) b/g device features small chip-scale package, measuring 5.8x6.4mm, which incorporates the RF, modem, baseband and hard MAC (media access controller) in a true single-chip format. The PC card also features the dual band a/b/g UniFi-1 Enterprise device, in a BGA single-chip package.