| ??? 10/09/10 18:07 Read: times |
#179015 - Maxim chip looking real nice Responding to: ???'s previous message |
That Maxim chip looks really interesting. It gets very close to the flexibilities of a normal GPIO pin from a microcontollers.
I was a little worried when I saw Vih was 0.7* V+ but then noticed that that was just for the GPIO side. The SPI side has 1.6V for Vcc <= 3.3V and 2.0V for Vcc > 3.3V making it work very well with a 3.3V microcontroller while giving 5V GPIO functionality. The only thing to look for is that Dout is between Vcc and Vcc-0.5V so a microcontroller that isn't 5V tolerant needs a bit of help for the MISO signal. |
| Topic | Author | Date |
| 5V configurable bus expansions? | 01/01/70 00:00 | |
| have a look | 01/01/70 00:00 | |
| Like this ? | 01/01/70 00:00 | |
| CPLD/FPGA | 01/01/70 00:00 | |
| Maxim chip looking real nice | 01/01/70 00:00 | |
| 7301 | 01/01/70 00:00 | |
| But SPI as carrier is at least very easy to use | 01/01/70 00:00 | |
| unfair comparison | 01/01/70 00:00 | |
| Not really true | 01/01/70 00:00 | |
| I2C | 01/01/70 00:00 | |
| Don't entirely agree | 01/01/70 00:00 | |
| picky | 01/01/70 00:00 | |
| Not even that! | 01/01/70 00:00 | |
| Agree | 01/01/70 00:00 | |
| Subject is changed. | 01/01/70 00:00 | |
External pull-up or '245 are much too limiting | 01/01/70 00:00 | |
| Totally Agree | 01/01/70 00:00 |