I haven't flown the 320, but on most a/c, light braking from high speeds and kept on until turnoff will heat them the most.
We teach no brakes (if possible) until 80 kts., then "Use them firmly, get off them completly, then use them firmly again" to clear the runway.
Light, smooth braking is great for passenger comfort, but not so good for brake wear and temperatures.
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[This message has been edited by quid (edited 01 October 2000).]