VeriSilicon GSMC 0.15um LP Syn. DROM Compiler User's Guide
Contents
1. ROM Address Depth 64 to 32768 Words Increments of 8 X Column Mux The following list shows the changes of width and height when column mux is set to different values Suppose when column mux is 16 the width and height are standard Column Mux Width Height 8 1 2 2 16 1 1 32 2 1 2 Top Metal m4 m5 m6 or m7 Output Drive Strength The same drive as INVHD8X cell in VeriSilicon GSMC 0 15um High Density Standard Cell Library VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Introduction 1 6 ROM Floor Plan Memory Array Row decoder Memory Array Column Decoder Sense Amplifier CLK control Column Decoder Sense Amplifier Data Output CLK amp CEN amp AD amp OE Data Output Fig 1 ROM Floor Plan VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Introduction Timing Diagram 2 1 Timing Specifications for Diffusion ROM This section illustrates the timing specifications for the diffusion ROM Fig 2 depicts the read function timing diagram of diffusion ROM AD i CLK DOUTIi CEN Fig 2 Read Function Timing Fig 3 depicts the diffusion ROM output enable timing diagram OE t z DOUTIi Fig 3 Output Enable Function Timing Timing Parameters The following table specifies the timing parameters in the datasheet generated by the ROM compiler Timing Paramet2. Top Metal Layer m5 m6 AREA lt um x um gt width x height Foretell Default Generate Exit Fig 1 the ROM Compiler GUI Fill content in the blank textbox for each option and click the proper button you will get your results VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler Bsiticon 13 Parameters under GUI and Shell Commands The section specifies detailed descriptions of the parameters of the ROM compiler and their corresponding default value Parameter under Parameter Shell Description under GUI Commands Specify the library directory used by the Register File compiler lib Library You can click on the browse button to find the valid library you have installed Specify the output directory of the ROM compiler Running rundir Direct The directory name can be any valid path name supported by the irectory system The default is current directory Specify the block name The block name can include any alphanumeric value and must be unique to avoid name conflicts for blocks within the same block Block Name library It is recommended that a block name contains no more than 16 characters for we will identify two blocks by their first 16 letters The default is DROM4096X32M8 Specify the number of words in the block The default value is 4096 The range for words can be 64 to 32768 F A Number of The fol
3. block Library Running Directory Block Name Number of Words Number of Bits Ring Width Frequency MHz ROM Code File Multiplexer Width Horizontal Ring Layer Vertical Ring Layer Top Metal Layer The ROM compiler generates the following output files GDSII Layout File GDSII format LVS Netlist CDL format Verilog Model Code TLF Timing Synopsys Model Datasheet ROM code file LEF view Antenna LEF view VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler Bsiticon 11 After inputting the parameters users should wait a few minutes for the outputs to be generated by the ROM compiler automatically Antenna CLF model 3 5 Getting Started There are two ways to start ROM compiler as follows Using Shell Commands Users can launch ROM compiler using commands line in the shell window Enter the following commands to launch the ROM compiler directly from the shell cd lt running_dir gt MC options with parameters The lt running_dir gt is the directory in which the ROM compiler runs All the outputs will be generated in this directory Make sure that the running directory lt running_dir gt is different from the installation directory lt install_dir gt The following options can be specified in the command line lib lib_dir outdir run_dir block mem_name wordsnumber memlength bitsnumber datawidth ringwidth ringwidth muxwidth varMuxWidth viayer varVLayer hla
4. following minimum host configuration is available e Sun Microsystem s Solaris7 Software Environment The ROM compiler requires UNIX and X Window as its GUI was developed with Motif Installing ROM Compiler To install ROM compiler please follow the instructions bellow 1 Create an installation directory where you wish to install the ROM compiler NOTE lt install_dir gt will stand for the directory you have created for installation hereafter cd lt install_dir gt gunzip lt lt release compressed file gt tar xvf Copy vsmerc file to the home directory Add the following to cshrc file pro m source vsmcrc 6 Modify vsmerc file as the following and source it setenv VERISILICON_MC_DIR lt install_dir gt After successful installation the following directory structure will be created under lt install_dir gt gsmc_drom 15_lp This directory contains the technical files and library files of the ROM VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler Bsiticon 10 The following table lists the names of the executable files in the installation directory and its description compiler Name Description MC The executable file of ROM compiler NOTE Be sure not to edit any files in lt install_dir gt directory 3 4 Inputs and Outputs The ROM compiler allows users to define the following input parameters for a specific ROM
5. VeriSilicon GSMC 0 15um Low Power Synchronous Diffusion ROM Compiler User s Guide siticon Trademark Acknowledgments VeriSilicon amp the VeriSilicon logo are the trademarks of VeriSilicon Microelectronics Shanghai Co Ltd All other products and company names mentioned may be the trademarks of their respective owners 2002 VeriSilicon Microelectronics Shanghai Co Ltd All rights reserved Printed in P R China VeriSilicon Microelectronics Shanghai Co Ltd reserves all its copy rights and other intellectual property rights ownership powers benefits and rights arising or to arise from this manual All or part of the contents of this manual may be changed by VeriSilicon Microelectronics Shanghai Co Ltd without notice at any time for any reason including but not limited to improvement of the product relating hereto VeriSilicon Microelectronics Shanghai Co Ltd shall not undertake or assume any obligation responsibility or liability arising out of or in respect of the application or use of the product described herein except for reasonable careful and normal uses Nothing whether in whole or in part within this manual can be reproduced duplicated copied changed or disposed of in any form or by any means without prior written consent by VeriSilicon Microelectronics Shanghai Co Ltd VeriSilicon Microelectronics Shanghai Co Ltd 3F Building 1 No 200 Zhangheng Road Zhang
6. e memory blocks via a friendly GUI or shell commands The compiler supports a comprehensive range of word lengths and bit lengths While satisfying speed and power requirements it is optimized for area efficiency VeriSilicon GSMC 0 15um Low Power Synchronous Diffusion ROM compiler uses three metal layers within the blocks and supports metal 4 5 6 or 7 as the top metal Dummy bit cells are embedded with the intention to enhance reliability 1 2 Features e High Density e High Speed e Size Sensitive Self time Delay for Fast Access and Zero Hold Time e Automatic Power Down 1 3 Operating Conditions The following table gives the recommended operating conditions for memory blocks generated by ROM compiler Operating Conditions Parameter Rating Supply Voltage 1 5V 1 35V to 1 65V Temperature 25 C 0 C to 125 C VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Introduction 1 4 Pin Descriptions Bsiticon 5 The following table gives detailed information of pin descriptions for ROM Bus index in descending order Pin Description DOUT i Data output ADIi Address input CEN Chip enable input low enable CLK CLK input positive edge active OE Output enable high enable 1 5 Parameter Range Parameter Range Memory Array Range 128 to 2M Bits Data Width 2 to 128 Bits Increments of 1
7. ers Parameter Symbol Cycle time tcyc Access time ta VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Timing Diagram 8 Address setup time tas Address hold time tah Chip enable setup time tes Chip enable hold time tch Output enable to hi Z time tz Output enable active time thz Parameters values are loaded dependently Power Parameters The following table specifies the power parameters in the datasheet generated by the ROM compiler Power Parameters Parameter Symbol Average current lavg Peak current Ipeak lavg IS the average current in A 100MHz unit The average current in the datasheet is achieved under below assumptions 1 Input net transition is 0 2ns 2 Output port capacitance is OpF The total average current of the memory than can be estimated according to the following equation lavg lag F 1 2 C V T N Where lavg the total average current of the memory A F the frequency of clock 100MHz C the average capacitance of output port F V the voltage supply V f the frequency of output port Hz N switched ports number ipeak iS the peak current of memory during operation in A unit VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Timing Diagram 3 1 3 2 3 3 Using the ROM Compiler System Requirement Before installation make sure that the
8. jiang Hi Tech Park Pudong New Area Shanghai 201204 P R China Tel 86 21 5131 1118 Fax 86 21 5131 1119 Web http www verisilicon com 3 Contents Chapter 1 Introduction 4 1 1 Compiler DescriptiOM oooomococccccnnnnncnnnnnccccccncnnncnnnnnnno 4 2 Feilen 4 1 3 Operating Conditions 2444444444nnnnnnnnn nennen 4 14 Pin Desctiplions nee 5 1 5 Parameter Range ee 5 1 6 ROM Floor Plan 6 Chapter 2 Timing Diagram 7 2 1 Timing Specifications for Diffusion ROM 7 Timing Parameters nnnnnnssnnnnnnnnnnnnnnnnnnnnn 7 Power PIANO Sivnscscnasvcasinssisaninuseewaonatianains 8 Chapter 3 Using the ROM Compiler 9 3 1 System Requirement oooocccccccccncccnonoccccncccnnnnnnnnannnnnnnos 9 3 2 Software Environment 244444snnnnnnnnnn nennen 9 3 3 Installing ROM Compiler sun44 nennen 9 3 4 Inputs and QUID near 10 35 ERIN e fz 1 210 leery nen eer ere eee 11 Using Shell Commands 11 Using Graphical User Interface GU I 12 3 6 Generating the Outputs 2244400ennnnnn nennen 14 VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Introduction Introduction 1 1 Compiler Description VeriSilicon GSMC 0 15um Low Power Synchronous Diffusion ROM compiler optimized for Grace Semiconductor Manufacturing Corporation GSMC 0 15um Logic 1P7M Salicide 1 5 3 3V process can flexibly generat
9. lowing gives the detailed information ne Words Mux Number of words Increment 8 64 to 8192 Mux 8 16 128 to 16384 Mux 8 32 256 to 32768 Mux 8 Specify the number of bits in the block The default value is 32 The range for bits can be 2 to 128 The following gives the detailed information bitsnumber Number of Mux Number of Bits Increment Bits 8 2 to 128 1 16 2 to 128 1 32 2 to 64 1 Specify the ring width of the block in um ringwidth Ring Width The default value is 5 The minimum is 2 The designer must decide the ring width according to the power analysis Specify the frequency of the clock of the chip in MHz The default frequency Frequency value is 100MHz codefile CodeFile Specify the code file of the ROM Please refer to the following VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler Bsiticon 14 figure for detailed information about the code file format If an user doesn t specify the code file or the code file he specifies doesn t exist all the bits of the ROM block will be set to 1 automatically The default is NOCODE Specify the column multiplexer width The default value is 8 There are three buttons for your choice 8 Multiplexer muxwidth a 16 or 32 When this option is set to different values the width i and height of the block will change correspondingly For detailed information please refer to Parameter Range section o
10. n page 5 l Vertical Specify which metal layer will be the vertical ring layer It can vlayer y Ring Layer only be m4 Horizontal Specify which metal layer will be the horizontal ring layer It can hlayer Ring Layer only be m3 topmetal Top Metal Specify the top metal layer It can be m4 m5 or m6 The default Layer value is m4 area yin Once area y is used the compiler will only generate a width X height report Default is n The following illustrates the format of code file of a ROM name of DROM64 X7 with 64 words 7 bits Column 1 bit 6 Column 7 bit 0 the highest bit 1010001 the lowest bit 1111111 Line 1 address 0 0000000 0011110 Line 64 address 63 1100111 Each character in a line indicates the bit of a word 3 6 Generating the Outputs When you click on the Default button in the GUI window the ROM compiler will automatically load the default parameters of the ROM and generate the ROM based on the default parameters To generate the outputs click on Generate button All the outputs are generated according to the generic parameters you set and are placed in the VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler user specified running directory lt running_dir gt Bsiticon 15 The following table lists the detailed description of the output files Name Description tlf TLF Model lib Syno
11. psys Model net Cdl netlist gds GDS file ds Datasheet tv Verilog Model dat Rom Code File lef LEF view antenna lef Antenna LEF view antenna clf Antenna CLF model And click on Exit button to quit the ROM compiler VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler
12. yer varHLayer frequency frequency codefile codefile topmetal topmetal area y n Please see section Parameters under GUI and Shell Commands for detailed explanation Example VeriSilicon GSMC 0 15um LP Syn DROM Compiler User s Guide Using the ROM Compiler Bsiticon 12 MC lib gsmc_drom 15_ Ip block DROM2048X16 wordsnumber 2048 bitsnumber 16 muxwidth 16 vlayer m3 hlayer m4 frequency 100 codefile DROM2048X16 topmetal m4 This command will generate a ROM name of DROM2048X16 with 2048 words 16 bits 16 column multiplexer width frequency of 100MHz metal layer 3 as the vertical ring layer metal layer 4 as the horizontal ring layer and metal layer 4 as the top metal layer according to the code file DROM2048X16 Using Graphical User Interface GUI We provide a friendly GUI to enable the users to configure parameters and generate all the outputs in the directory specified From the shell type the commands as follows cd lt running_dir gt MC Click on the browse button to select the ROM s library then the following GUI window for ROM compiler will appear on your screen MC E Library GSMC 15u Diffusion ROM LP Browse Running Directory Browse Block Name DROM4096X32M8 Number of Words 4096 Number of Bits 32 Ring Width lt um gt 5 000000 Frequency lt MHz gt 100 000000 Rom Code File NOCODE Browse Multiplexer Width 5 16 32 Horizontal Ring Layer m3 m Vertical Ring Layer m3 _ m4
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