ICE-CHIPS
Specs for DSP chips used on ICE cards

PCI Controller

The Altera FLEX10K20/30 is programmed as a 32/64 bit PCI master/target controller responsible for handling communication between the host and the SHARC.  Mailboxes in this chip are used to send command packets from the host and present a response from the SHARC.  The SHARC also schedules DMA read or write bursts of up to 1MWord in length between host and SHARC memory.   All ICE devices show up as Altera based cards 0x1172, with device number 0x7777.  The revision number in the PCI config space stores the card type.

Transfer rates depend on the system PCI controller and bus loading.  This chip is configured from an EPROM at power-up.

SHARC 21062 Processor

The Analog Devices 21062 SHARC is a high performance 32-bit signal processor for speech, sound, graphics, and imaging applications.
The system-on-a-chip architecture operating at 40 MHz features:

• 32-bit IEEE floating point computations (80MFLOPS)
• 256 Kby dual-ported SRAM
• Four serial I/O ports capable of transfering 40Mbits/s each (2 input, 2 output)
• Six bi-directional link ports capable of transfering 40Mby/s each
• Ten simultaneous DMA channels (6 link ports, 2 serial ports, and 2 host/PCI channels)
• Total DMA throughput of up to 240 Mby/s with transparent memory crossbar
• Specs: 1K CFFT in 460uS, continuous 2K RFFTs at 4 MHz

SHARC 21160 Processor

The Analog Devices 21160 SHARC is a high performance 32-bit signal processor for speech, sound, graphics, and imaging applications.
The system-on-a-chip architecture operating at 100 MHz features:

• 32-bit IEEE floating point computations (400MFLOPS)
• 512 Kby dual-ported SRAM
• Four serial I/O ports capable of transfering 100Mbits/s each (2 input, 2 output)
• Six bi-directional link ports capable of transfering 100Mby/s each
• Fourteen simultaneous DMA channels (6 link ports, 4 serial ports, and 4 host/PCI channels)
• Total DMA throughput of up to 700 Mby/s with transparent memory crossbar
• Specs: 1K CFFT in 92uS, continuous 2K RFFTs at 20MHz

SHARC 21161 Processor

The Analog Devices 21161 SHARC is a high performance 32-bit signal processor for speech, sound, graphics, and imaging applications.
The system-on-a-chip architecture operating at 100 MHz features:

• 32-bit IEEE floating point computations (400MFLOPS)
• 128 Kby dual-ported SRAM
• Four serial I/O ports capable of transfering 100Mbits/s each (2 input, 2 output)
• Two bi-directional link ports capable of transfering 100Mby/s each
• Ten simultaneous DMA channels (6 link ports, 4 serial ports, and 4 host/PCI channels)
• Total DMA throughput of up to 700 Mby/s with transparent memory crossbar
• Integrated SDRAM controller with 400 Mby/s external memory bandwidth
• Specs: 1K CFFT in 92uS, continuous 2K RFFTs at 20MHz

I/O Controller

The Altera  programmable gate array sits between the I/O Modules and the SHARC processor.  It is typically responsible for muxing/demuxing 1, 4, 8, or 16 bit data into the 4/8-bit link port and controlling the external I/O Modules. It can also be used to bridge the A and B ports, upsample tuner input data, process digital time code bits, or other special purpose functions.  The FLEX10K20 (ICE-PIC2) has 1152 logic cells and 12288 ram bits.  The FLEX10K50 (ICE-PIC3/ICE-MBT3) has 2880 logic cells and 20480 ram bits.  The FLEX20K100E (ICE-PIC4) has 4160 logic cells and 53248 ram bits.

The IOC is programmed in AHDL.  The interface design files are available by request for developers to create their own special purpose functions.  See the IOC help page for currently available IOC functions.

The Graychip/TI GC4014 is a 4 channel digital tuner featuring:

• Input rates up to 65 MSPS
• Four real input down-convert channels, or two complex input down-convert channels
• Independent tuning frequencies
• Independent phase and gain controls
• Decimation factors of 16 to 8192 in the real output mode, 32 to 16384 in complex mode
• 0.020 Hz tuning resolution at 65 MSPS
• Five stage CIC provides greater than 100dB far image rejection
• 116 dB spur free dynamic range
• User programmable 21 and 63 tap decimate by two filters, independent per channel
• Nyquist filtering for QPSK or QAM symbol data
• Meets GSM, AMPS, DAMPS, IS95, WBCDMA single channel, and MCNS specifications
• 250mW per channel at 50MHz, 3.3 volts

The decimation must be a multiple of 2 and can range from16 to 32K. Decimation must be the same for all channels on the same chip.

GC4016 Digital Tuner

The Graychip/TI GC4016 is a 4 channel digital tuner / resampler featuring:

• Input rates up to 100 MSPS
• Four real input down-convert channels, or two complex input down-convert channels
• Independent tuning frequencies
• Independent phase and gain controls
• Independent decimation controls
• Decimation factors of 16 to 8192 in the real output mode, 32 to 16384 in complex mode
• Zero padding for lower decimation factors
• 0.020 Hz tuning resolution at 70 MSPS
• Five stage CIC provides greater than 100dB far image rejection
• 116 dB spur free dynamic range
• User programmable 21 and 63 tap decimate by two filters, independent per channel
• Nyquist filtering for QPSK or QAM symbol data
• Resampler provides in/output rate independence, user programmable filter (up to 512 taps)
• Meets GSM, AMPS, DAMPS, IS95, WBCDMA single channel, and MCNS specifications
• 250mW per channel at 50MHz, 3.3 volts

The decimation must be a multiple of 2 and can range from16 to 32K in four channel mode, 8 to 16K in two channel, or 4 to 8K in single channel mode.

AD6620 Digital Tuner

The Analog Devices AD6620 is a single channel digital tuner featuring:

• Input rates up to 65 MSPS (32.5MSPS in diversity mode)
• Decimation factors of 1 to 16384
• 0.020 Hz tuning resolution at 65 MSPS
• 2nd order and 5th order CIC provides better than 110dB out of band rejection
• User programmable, maximum 256 tap FIR filter (max 130M taps per second)
• Minimum decimation of 256 with 256 tap filter, 32 with 32 tap filter, 4 with 4 tap filter, etc...

The diversity mode allows two inputs with the same clock to be tuned to the same frequency by a single chip.

The Analog Devices AD6640 is a single channel A2D Converter featuring:

• Input rates up to 65 MSPS, minimum sample rate of 5MHz
• Two's complement, 12 bit resolution