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PDSP16488AMA Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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PDSP16488AMA Datasheet(HTML) 1 Page - Mitel Networks Corporation |
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1 / 30 page  PDSP16488A MA 1 FEATURES 8 16 8 16 8 16 1 1 1 1 1 2 1 2 2 4 4 - 1 2 2 4 4 - 4 - 6 - - - 4 - 6 - - - 4 - 8 - - - 9 - - - - - Pixel 3x3 5x5 7x7 9x9 11x11 15x15 23x23 Size 10MHz 10MHz 20MHz 20MHz 40MHz 40MHz Max Pixel Rate Window size * * * Maximum rate is limited to 30 MHz by line store expansion delays Table 2 Devices needed to implement typical window sizes Table 1 Single Device Configurations 40MHz 20MHz 10MHz 20MHz 10MHz 8 8 8 16 16 4 8 8 4 8 4 4 8 4 4 4x1024 4x1024 8x512 4x512 4x512 Data Size Window Size Width X Depth Max Pixel Rate Line Delays The PDSP16488A is a fully integrated, application spe- cific, image processing device. It performs a two dimensional convolution between the pixels within a video window and a set of stored coefficients. An internal multiplier accumulator array can be multi-cycled at double or quadruple the pixel clock rate. This then gives the window size options listed in Table 1. An internal 32k bit RAM can be configured to provide either four or eight line delays. The length of each delay can be programmed to the users requirement, up to a maximum of 1024 pixels per line. The line delays are arranged in two groups,which may be internally connected in series or may be configured to accept separate pixel inputs. This allows inter- laced video or frame to frame operations to be supported. The 8 bit coefficients are also stored internally and can be downloaded from a host computer or from an EPROM. No additional logic is required to support the EPROM and a single device can support up to 16 convolvers. The PDSP16488A contains an expansion adder and delay network which allows several devices to be cascaded. Convolvers with larger windows can then be fabricated as shown in Table 2. Intermediate 32 bit precision is provided to avoid any danger of overflow, but the final result will not normally occupy all bits. The PDSP16488A thus provides a multiplier in the output path, which allows the user to align the result to the most significant end of the 32 bit word. Fig. 1 Typical , Stand Alone, Real Time System DELAYED SYNC PIXEL CLOCK GENERATOR SYNC EXTRACT ADDR DATA CLK SYNC BYPASS AUX DATA EPROM OUTPUT DATA POWER ON RESET RES A/D CONVERTER OPTIONAL FIELD STORE COMPOSITE DATA IN PDSP 16488A CONVOLVER I The PDSP16488A is a fully compatible replacement for the PDSP16488 I 8 or 16 bit pixels with rates up to 40 MHz I Window sizes up to 8 x 8 with a single device I Eight internal line delays I Supports interlace and frame to frame operations I Coefficients supplied from an EPROM or remote host I Expandable in both X and Y for larger windows I Gain control and pixel output manipulation I 132 pin QFP Rev A B C D Date MAR 1993 JUL 1996 JAN1997 NOTE Polyimide is used as an inter-layer dielectric and as glassivation. Polymeric material is also used for die attach which according to the requirement in paragraph 1.2.1.b. (2) precludes catagorising this device as fully compliant. In every other respect this device has been manufactured and screened in full accordance with the requirements of Mil-Std 883 (latest revi- sion). CHANGE NOTIFICATION The change notification requirements of MIL-PRF-38535 will be implemented on this device type. Known customers will be notified of any changes since the last buy when ordering further parts if significant changes have been made. PDSP16488A MA Single Chip 2D Convolver with Integral Line Delays Supersedes January 1997 version, DS3742 - 3.1 DS3742 - 4.0 January 2000 |
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