| Joe Gold 02/04/10 06:18 Modified: 02/04/10 06:18 Read: 193 times Melbourne Australia |
#172887 - LPC900 are 5V input tolerant Responding to: Grant Beattie's previous message |
5V input is no problem so lets talk about outputs.
drive 5V outputs If you need to drive in to 4000 CMOS logic then perhaps you could add a 5V pull up resistor in the following operation. a) Logic level low required - just drive the output low (there will be some current thu the pull-up) b) Logic level low - turn the pin in to an input or Hi Z input and the 5V pull-up will sink current in to the 4000 CMOS etc. Also some of the new LPC900 series Have Vdd up to 5V - ie the LPC9xx1 series. Regards Joseph |
| Topic | Author | Date |
| 5v Flash 8051 (low pin count) | Grant Beattie | 02/03/10 15:36 |
| NXP: LPC9xx? | Andy Neil | 02/03/10 15:56 |
| Older? | Neil Kurzman | 02/03/10 17:12 |
| WHY 5v??? | Erik Malund | 02/03/10 18:26 |
| Yes they have the M8 core | Grant Beattie | 02/04/10 08:10 |
| SiLabs Parts Can Interface 5V logic | Michael Karas | 02/03/10 22:10 |
| re SILabs | Erik Malund | 02/04/10 10:00 |
SiLabs | Maarten Brock | 02/08/10 13:16 |
| LPC900 are 5V input tolerant | Joe Gold | 02/04/10 06:18 |
| See App Note cited earlier | Andy Neil | 02/04/10 07:23 |
| 5-volt LP9xx1? | Jan Waclawek | 02/04/10 15:14 |
| check also | Stefan KAnev | 02/05/10 03:33 |