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WiFi chip squeezed 802.11n chip for MicroSD cards

Combining baseband and MAC (media access control) processing, the RS9110 targets a wide variety of devices, from phones to personal navigation devices (PNDs) to digital cameras. It comes in wafer layer chip scale packaging (WLCSP) and SiP (system in package) form factors, Redpine says, making it suitable for incorporation into, for example, MicroSD cards.

Features and benefits cited by Redpine for the RS9110 include:

  • Single-antenna IEEE 802.11n with space time block code (STBC) support
  • 1×1 802.11n mode conforming to WiFi Alliance’s handheld (HH) certification profile
  • Patented low-power techniques to minimize power consumption
  • Full-throughput SDIO v1.2/2.0
  • Serial peripheral interface (SPI) and expansion bus interface (EBI)
  • Zero host overhead architecture with proprietary processor core
  • WEP, TKIP, and AES hardware engines for line-speed security support
  • Advanced 802.11e-based QoS support, including wireless multimedia extensions (WMM) and wireless multimedia power save (WMM-PS)
  • Bluetooth coexistence support
  • Backward compatibility with IEEE 802.11a/b/g

According to Redpine, the RS9100 uses substantially less power than competitive products that do not support 802.11n, though it did not quantify this.

Venkat Mattela, Redpine’s CEO, said, “Our research spanning over six years concludes that the silicon geometry has minimal effect on power consumption, as compared to the effect on power due to wireless performance and system level optimization techniques. Lite-Fi unveils intrinsic advantages of 802.11n for low power over 802.11b/g, and we enhance it further with our unique and proprietary patented techniques to optimize the power for the total signal chain.”

Full Article

 WiFi, Wi-Fi, Chip, MicroSD, Cards

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