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What difference is there between gal and pal?

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002

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22v10 pal programming cable

:sm9: What difference is there between gal and pal? :sm9:
 

Rayengine

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difference a gal from a pal?

The most different may be GAL can be re-programmable but PAL can't support the feature.
 

hot_chmock

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Hi,

I have used PAL's with a window to erase with UV light just like an EPROM.

hc

:roll:
 

pit

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002 said:
:sm9: What difference is there between gal and pal? :sm9:
PAL: registered trademark of AMD/MMI
GAL: registered trademark of Lattice

In the beginning there was MMI (later accquired by AMD) which manufactured the original PAL (programmable array logic). This was the opposite part to the TTL PROMs. The original PAL was not erasable, it was just OTP (one time programmable).

Later Lattice came and produced electrically erasable PALs, they called it GAL (general array logic). They also introduced a significant enhancement: the univeral output cell which could be a straight output, a registered output, tri-state etc.

Later on AMD/MMI enhanced their OTP-PALs to the more general structure of the GALs, they made their PALs erasable, too, and called them PALCE.

So a GAL16V8 is similar to a PALCE16V8. Other well known types are 20V8 and 22V10.

Programming algorithms differ from type to type and from manufacturer to manufacturer.
 

Hero

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Hi,

Lattice bought small density PLDs from AMD so PAL,PALCE and GALa are Lattice ownership.

Regards
 

ahgu

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what is the cheapest way to program gal?

to program lattice gal? what is the cheapest on board method?
 

djolestojic

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Onboard programming of GALs

Hi,

The cheapest method of onboard GAL programming can be done with
Lattice's ispGAL family. This is one member family with PLCC 22 housing and with 22V10 core. It can be programmed using programming cable (datasheet available on the Lattice website, together with the programming software).

Happy to be of some use to this good forum,
djolestojic :)
 

djolestojic

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Onboard programming of GALs

Hi,

The cheapest method of onboard GAL programming can be done with
Lattice's ispGAL family. This is one member family with PLCC 22 housing and with 22V10 core. It can be programmed using programming cable (datasheet available on the Lattice website, together with the programming software).

Happy to be of some use to this forum,
djolestojic :)
 

djolestojic

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Onboard programming of GALs

Hi,

The cheapest method of onboard GAL programming can be done with
Lattice's ispGAL family. This is one member family with PLCC 22 housing and with 22V10 core. It can be programmed using programming cable (datasheet available on the Lattice website, together with the programming software).

Happy to be of some use to this forum,
djolestojic :)
 

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