*request the AHA3422 product specification for complete details. comtech aha corporation comtech aha corporation product brief* AHA3422 starlite 16 mbytes/sec lossless decompressor ic AHA3422 is a high speed lossless decompression coprocesso r ic for the hardcopy systems on many standard platforms, including the pci bus. the device offers a low cost decompression only solution for under 30 ppm printers or 50 ppm copiers at 1200 dpi. high speed decompression , flexible interfaces and advanced banding support make this a unique solution for raster image processing (rip) controller designs. advanced banding support handles blank, uncompressed and compressed bands. scan line and record length counters accommodate various prin t resolutions and band buffer sizes. software simulation and an analysis of the algorithm for printer and copier images of various complexity are ava ilable for evaluation. features performance: ? 16 mbytes/sec data rate 132 mbytes/sec burst data rate over a 32-bit data bus 33 mbytes/sec burst rate, 16 mbytes/sec sustained synchronous 8-bit video out port average 15 to 1 compression ratio for 1200 dpi bitmap image data advanced banding support flexibility: big endian or little endian; 32 or 16-bit bus width and data bit/byte reordering for duplex printing support programmable record length, record count and scan length registers may be prearmed scan line length up to 2k bytes interfaces directly with various motorola 68xxx and cold fire and in tel i960 processors pass-through mode passes raw data through the decompression engine system interface: single chip decompression solution?no external sram required four internal 16 32-bit fifos maskable interrupts tristatable outputs to facilitate board level testing others: low power modes optional counter checks errors in decompression software emulation program available 128 pin quad flat package applications digital copiers printer controllers multifunction printers and copiers 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 34 33 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 pa [ 3 ] pa [ 2 ] pa [ 1 ] pa [ 0 ] test0 voackn vss vdd nc vod[7] vod[6] vod[5] vod[4] vod[3] vss vdd vod[2] vod[1] vod[0] voeorn voreqn d[31] vss vss vdd vdd d[30] d[29] d[28] d[27] d[26] d[25] vdd vss d[24] d[23] d[22] d[21] d[20] d[19] d[18] d[17] d[16] d[15] vdd vss vdd vdd vss clock vdd vss vss test1 d[14] d[13] d[12] vdd vss d[11] d[10] d[9] d[8] d[7] *i *i *i *i *i intrn vss vdd driven sd doackn vdd diackn vdd vss vdd doreqn nc direqn nc nc d[0] vss vss vdd vdd d[1] d[2] d[3] d[4] d[5] d[6] vdd pa [ 5 ] vss pa [ 4 ] nc voeotn procmode[1] procmode[0] csn vdd vss dir rstn pd[7] pd[6] pd[5] vdd vss pd[4] pd[3] pd[2] pd[1] pd[0] vdd vss rdyn vdd *i *i *i vdd vss notes: nc = no connect; *i = connect to vdd or vss AHA3422a-033 pqc yywwd - country of origin lllll yywwd = date code; lllll = lot number
comtech aha corporation figure 1: AHA3422 block diagram functional description the coprocessor device has two external high speed synchronous data ports each capable of transferring once every 33 mhz clock. these are a 32-bit bidirectional data port and an 8-bit video output data (vod) port. the data port is capable of transferring up to 132 mbytes/sec. the vod is capable of up to 33 mbytes/sec. decompression data is accepted through the data port, buffered in the decompression input fifo (di fifo), and de compressed. the output data is made available on the data port via the decompression output fifo (do fifo) or optionally on the 8-bit video output port. the decompression engine runs on the 33 mhz clock and is capable of processi ng an uncompressed byte every other clock, i.e. 16 mbytes/sec. the two fifos are organized as 1632 each. for data transfers through the two ports, the ?effective? fifo widths differ according to their data bus widths. data transfer is synchron ous over the data ports functioning as dma masters. to initiate a transfer into or out of the vide o port, the device asserts voreqn, the external device responds with voackn and begins to tran sfer data over the vod bus on each succeeding risi ng edge of the clock until voreqn is deasserted. the data port relies on the fifo threshold settings to determine the transfer. system application the device is intended for memory intensive applications requiring a hardware decompression device, such as high reso lution copiers or printers. the part is typically used in systems where starlite compression is performed e ither in software or in another starlite compression device. it may also be used in systems requirin g multiple decompressors. d[31:0] driven test clk rstn procmode[1:0] pd[7:0] pa[5:0] csn dir rdyn intrn voackn vod[7:0] voreqn voeorn voeotn (to printer) data port di fifo 16x32 clock decompressor microprocessor interface do fifo 16x32 vod port AHA3422 starlite 8 8 8 32 32 32 5 8 doreqn direqn sd doackn diackn data port control
comtech aha corporation starlite image compression results - 1200 x 1200 dpi uncompressed file size = 16 mbytes; image dimensions = 10200 13200 pels fonts - simple text output file size = 783,848 compression ratio = 21.5 math - simple text and lineart output file size = 79,245 compression ratio = 212.4 mp - text and simple graphics output file size = 86,525 compression ratio = 194.5 bench2 - text and gra phics with pictorials output file size = 424,995 compression ratio = 39.6 balls - complex graphics with pictorials output file size = 3,665,167 compression ratio = 4.6
comtech aha corporation pb3422_0600 ? 2005 comtech aha corp. comtech aha corporation 1126 alturas drive fax: 208.892.5601 tel: 208.892.5600 e-mail: sales@aha.com www.aha.com moscow id 83843-8331 a subsidiary of comtech te lecommunications corporation decompressor for mid-range multifunction copier/printer applications - an example about aha comtech aha corporation (aha) develops and markets superior integrated circuits, boards, and intellectual property core technology for communications systems architects worldwide. aha has been setting the st andard in forward error correction and lossless data compression technology for many years and provides flexible, cost-effective solutions for today?s growing bandwidth and reliability challenges. comtech aha corporation is a who lly owned subsidiary of comtech telecommuncations corp. (nasdaq: cmtl). for more informa tion, visit www.aha.com. ordering information frame buffer memory AHA3422 starlite diackn pa[4:0] csn dir rdyn intrn direqn data port vod port voreqn voackn voeorn cpu interface vod printer port 32 bit 8-bits voeotn part number description AHA3422a-033 pqc 16 mbytes/sec lossless decompressor ic
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