KeyASIC Products | CMOS | VOIP

General Description  

The Key ASIC VoIP SoC offers a high integration solution for WiFi handheld phones and dual-mode cellular phones. The SoC is based on a high performance ARM926EJS processor and integrates all the required peripherals, including the WLAN base-band circuitry required for WiFi access.  A complete VoIP system can be implemented with only the addition of external DRAM and Flash memories and the WLAN Radio chip.  Extensive on-chip power management capability minimizes power dissipation and extends battery life for handheld applications.  A reference design with complete Linux based VoIP software suite is available for fast time-to-market.  

Main Features  

• High performance ARM926EJS with clock rate of >300MHz
  • >300 MIPS of compute power
  • 16KB of Instruction and Data Cache
  • 4KB of Instruction and Data TCM
  • Vector Interrupt Controller
• DMA Controller to manage accesses to external memory
• SDRAM Controller for external SDRAM can support up to 256Mbytes of external SDRAM (up to 166MHz)
• Flash Controller for external NAND Flash can support up to 256Mbytes of NAND Flash
• USB 2.0 OTG UTMI Controller and PHY supporting a single port of USB 2.0 with transfer rates up to 480Mbps
• LCD Controller with support for monochrome and color LCD displays.  Can support up to 640x480 screen resolution
• Key-Pad Controller supports a 6x6 matrix for key-pad sensing.
• WLAN Base Band, MAC and PHY for 802.11bg standards
  • Supports 802.11b at 11Mbps data rate
  • Supports 802.11g at 54Mbps data rate
  • Support for 802.11d,e,h,i,j standards
  • Direct connection to WLAN RF Radio chip for 802.11bg
• RTC (Real Time Clock) for system time-keeping
• Timers
  • 3 independent Timer circuits for alarm functions
• Watch Dog Timer
  • Programmable Watch Dog Timer to prevent system lock-up
• Audio Stereo Codec for direct connection to headphone speaker and microphone input
  • 24-bit PWM DAC with 87dB SNR
  • Includes 100mW PWM power amplifier for direct connection to headphone-type speakers
  • 16-bit Sigma-Delta ADC with 90dB SNR
• I²S Interface for external digital audio connection (speakerphone)
• SPI Interface
  • Motorola-type SPI interface for external serial connection
  • Master or Slave configuration
• SDIO Interface for external connection
  • Supports the SD 1.01 and 1.10, MMC 3.31 and 4.1 specifications
• UART for external RS232 interface
• I²C Interface for connection to other devices
  • Supports standard and fast modes, master and slave operation
• 8 GPIO signals