topic Re: MCF5213 port pull-ups in ColdFire/68K Microcontrollers and Processors

MCF5213 port pull-ups

life_user — Tue, 26 Sep 2006 01:53:40 GMT

In the users manual for the MCF5213 there is no mention of pull-up resistors for port TC pins (PTC[0] thru PTC[3]). However, if these four are lines are defined as general purpose inputs these pins are acting as if there are approximately 30k pull-up resistors internally.

Are there internal pull-ups on port TC?

Re: MCF5213 port pull-ups

Nouchi — Tue, 26 Sep 2006 15:11:15 GMT

Hello,

I think there's pull-up on Port TC, because in the MCF5213EC datasheet, Table 3 P18 Pull-up/pull-down column says, "2 All signals have a pull-up in GPIO mode".
In table 26, there's a parameter (Iapu) which specify the Weak Internal Pull Up Device Current, tested at VIL Max.

Emmanuel