any AAS at any dosage will suppress HPTA at a certain amount of time.
if you run a light dose of orals for say 3 weeks you will probably have very little or no HPTA suppression. but if you go say 6 or 7 weeks then yes you will likely have suppression.
tren ace will start suppressing you week 3 or so. most injectables will start weeks 5 area. i like to start hcg once my nuts start shrinking