| ??? 02/14/06 01:41 Read: times |
#109890 - using a DataFlash (works only on 3v3) Responding to: ???'s previous message |
I am using a Data Flash AT45DB161B for storage of data. The Data Flash works only on 3v3.
In order to interface 3v3 DataFlash to 5V microcontroller, I would be required a voltage regulator and a level shifter as all other peripherals are of CMOS family. In the Atmel's datasheet("Interfacing 3V system to 5V system"), they had suggested some voltage regulators and level shifter but they are not available in the market. A friend of mine suggested me to go for 89LV51RD2. I don't think that Port0 of 89LV51RD2 is 5V tolerant as they(Philips) haven't mentioned it anywhere in the datasheet. Is it possible to use 74HCT373/74HCT573 between SO(DataFlash) & MISO(microcontroller)? That's the only problem I am facing if I have to use 89V51RD2. I am using LP2951-3.3V as voltage regulator. Sorry to lead you with half information about what project I am doing. Thanks, Erik, for your quick response & valuable suggestions. |
| Topic | Author | Date |
| Interface between LV uC & peripherals | 01/01/70 00:00 | |
| sure ... | 01/01/70 00:00 | |
| And we covered the LCD problem | 01/01/70 00:00 | |
| If you do not care about noise margin, t | 01/01/70 00:00 | |
| using a latch to interface keyboard | 01/01/70 00:00 | |
| well then | 01/01/70 00:00 | |
| good quote | 01/01/70 00:00 | |
| if, the port is "5V tolerant" and drivin | 01/01/70 00:00 | |
| using a DataFlash (works only on 3v3) | 01/01/70 00:00 | |
| in and out | 01/01/70 00:00 | |
Thanks for the quick response | 01/01/70 00:00 |