Hi On 18/09/2012 07:40, Baltissen wrote: > Hallo Didier, > > >> GAL 22V10-15LPN DIP24 8.20 Euro >> CPLD MAX7000 EPM7032 LC44-15 PLCC44 3.20 Euro > >> Is the -15 the speed of the component ? > Indeed, for both. for the speed I guessed but I was not sure. > >> Are they replaceable by each other ? > No, they are certainly not pincompatible. > I know that they are bot pin compatible my question should have been: can I do with a CPLD all I can do with a GAL ? >> Any idea on the difference ? > This GAL has 20 usuable pins, partly only input, partly I/O. The MAX > more then 32, mostly I/O (IIRC). > > The GAL with its DIP can be removed easier out of its socket whem to be > (re)programmed then the MAX. OTOH the S-version should have JTAG and is > in circuit programmable. > I have everything to program the altera CPLD, nothing for the GAL >> but I need an address decoding external to the CPLD >> (to reduce the number of io used on the cpld) > Please explain, this doen't make sense. Unless you need more glue logic > than your CPLD can provide. > I'm making a board with ram + eeprom the ram will use from 32K from $2000 the eprom will use the rest to $FFEF I'm thinking to place a register around $1720 to select a "page" in the ram so I can switch between several pages of 32k ($FFF0 to $FFFF will wrap to kim rom) I'm think to place a jumper to have the interrupt vector in the new eprom or in the original rom I also wanted a prototype area to do some experiment with the CPLD.... actually on the main cpld, I have - 12 bits of address A15-A4 (for the register and the exclusion in $FFF0-$FFFF - 8 bits of data for the register and experiment - 4 bits for the selection of the page in ram - 1 bit den signal - 1 bit cs for sram - 1 bit cs for eprom - 1 bit used but I dont remember for what :( the MAX7064S has 36 I/O but 4 are reserved for JTAG 4 are input only clr/oe1/oe2/clk the main use of the I/O on the cpld are for the vector wrapping and the address of the page register for the ram so I was thinking to save 8 bits for my experiments by decoding the register address and the $FFF0 by external chips. >> but no idea on how to program them > For about $40 you can buy the TOP853: > http://www.ebay.com/itm/top853-USB-universal-programmer-EPROM-MCU-GAL-PI > C-/160378432470 > Just picked the first hit on Google. Mine came with a PLCC44-to-DIP40 > adapter. > > >> (I thought a second CPLD would be too expensive) > Cheaper than a GAL, more flexible than LS. But then what about a bigger > CPLD? > bigger CPLD are more expensive... 7032 3.2 euro 7064 10 euro 7128 25 euro >> What is best GAL or CPLD ? > IMHO this depends on the availability of the parts and the price. > > > -- > ___ > / __|__ > / / |_/ Groetjes, Ruud Baltissen > \ \__|_\ > \___| http://Ruud.C64.org > > > > > De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de > geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te > nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit > e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. > Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige > overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij > overgebrachte virussen. > > APG Algemene Pensioen Groep NV is gevestigd te Heerlen en is ingeschreven in het > handelsregister van de Kamer van Koophandel Limburg onder nummer 14099617 > > > The information contained in this e-mail is confidential and may be privileged. > It may be read, copied and used only by the intended recipient. > If you have received it in error, please contact the sender immediately by > return e-mail; please delete in this case the e-mail and do not disclose its > contents to any person. We don't accept liability for any errors, omissions, > delays of receipt or viruses in the contents of this message which arise as a > result of e-mail transmission. > > APG Algemene Pensioen Groep NV is registered in the trade register of the Chamber > of Commerce Limburg, The Netherlands, registration number: 14099617 > > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2012-09-18 08:00:28
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