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PDSP16330GC1R Datasheet(PDF) 2 Page - Mitel Networks Corporation |
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PDSP16330GC1R Datasheet(HTML) 2 Page - Mitel Networks Corporation |
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2 / 9 page  PDSP16330/A/B 2 FUNCTIONAL DESCRIPTION The PDSP16330 converts incoming Cartesian Data into the equivalent Polar Values. The device accepts new 16 + 16 bit complex data every cycle, and delivers a 16 bit + 12 bit Polar equivalent after 24 clock cycles.The input data can be in 2s’ Complement or Sign Magnitude format selected via the FORM input. The output is in a magnitude format for both the Magnitude output and the Phase. Phase data is zero for data with a zero Y input and positive X, and is 400 hex for zero X data and positive Y, is 800 hex for zero Y data and negative X, and is C00 hex for zero X and negative Y. The LSB weighting (bit 0) is 2 x π/4096 radians. The 16 bit Magnitude result may be scaled by shifting one, two, or three places in the more significant direction, effectively multiplying the Magnitude result by 2,4 or 8 respectively. Any of these shifts can under certain conditions cause an invalid result to be output from the device. Under these circumstances the OVR output will become active. The PDSP16330 has independent clock enables and three state output controls for all ports. FORM This input selects the format of the X and Y input data. A low level on FORM indlcates that the Input data is twos’ complement format (Note: input data 8000 hex is not valid in 2s’ complement mode). This input refers to the format of the current Input data and may be changed on a per cycle basis if desired. The level of FORM is latched at the same time as the data to which it refers. S1-0 These inputs select the scaling factor to be applied to the Magnitude output. They are latched by the rising edge of CLK and determine the scaling of the output in the cycle after they are loaded into the device. The scale factor applied is determined by the table. Should the scaling factor applied cause an invalid Magnitude result to be output on the M Port, then the OVR Flag will become active for the period that the M Port output is invalid. The output number range is from 0 to 2 when the scaling factor is set at x1. S0 0 1 0 1 Scaling Factor x1 x2 x4 x8 S1 0 0 1 1 Fig.2 Block diagram + SHIFT 16 32 30 15 16 16 16 9 9 12 2 OEM S0 S1 FORM CEX SIGN 15 30 SIGN X SIGN Y X > Y OEP P11:0 OVR M15:0 X 2 MAGNITUDE MAGNITUDE Y 2 X 2 + Y 2 ROTATE SIGN Y/X CEY /4 ARCTAN ROM Y15:0 X15:0 π |
Similar Part No. - PDSP16330GC1R |
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Similar Description - PDSP16330GC1R |
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