| ??? 04/17/05 04:16 Read: times |
#91743 - Level translator Responding to: ???'s previous message |
Archilles Waterland said:
Hi,
I have a 8051 which runs on 5V DC powersupply. I need to interface it to FPGA which has 3.3V supply. For HIGH logic levels: From 8051 to FPGA I would have to add a resistor to drop the voltage from 5V to 3.3V From FPGA to 8051 I need to up from 3.3V to 5V Should I use some kindof buffer ? Since my 8051 is a TTL would I need to up the voltage ? Cause TTL VOH = 2.4V so 3.3V should be considered as HIGH. Any suggestions ? Thanks, Archilles How about a logic level translator? Maxim seems to make a variety of these; here is an example. --Sasha Jevtic |
| Topic | Author | Date |
| FPGA 8051 | 01/01/70 00:00 | |
| Level translator | 01/01/70 00:00 | |
| 5V and 3.3V | 01/01/70 00:00 | |
| Read this | 01/01/70 00:00 | |
| Something else to read | 01/01/70 00:00 | |
| why and how | 01/01/70 00:00 | |
| How true,,,,,Or | 01/01/70 00:00 | |
| Surface mount :( I need DIP | 01/01/70 00:00 | |
| FPGA on perfboard?! | 01/01/70 00:00 | |
| 8051 + FPGA + OV6620 Camera | 01/01/70 00:00 | |
| My cat says....... | 01/01/70 00:00 | |
| Doh! | 01/01/70 00:00 | |
| as Andy said | 01/01/70 00:00 | |
| 8051 + FPGA + OV6620 Camera | 01/01/70 00:00 | |
| Which still begs the question.. | 01/01/70 00:00 | |
| ... and another question | 01/01/70 00:00 | |
I would | 01/01/70 00:00 | |
| I thought | 01/01/70 00:00 |