| ??? 02/02/05 14:36 Read: times |
#86378 - the matter Responding to: ???'s previous message |
hi,
Erik Malund said:
RC reset circuit replacement in a 89C51 system.
Thus I voted "illogically underrated" Sure, but the matter of questions has nothing with C51. Original questions are: Payam Soltany said:
1) How can we detrmine whether or not this 50ns (max. 200ns) propagation delay between /CEin and /CEout of MAX691 is not too slow to be fed to /CS of SRAM?
2) Is it not better not to use this feature? i.e. no-connect the /CEin and /CEout of MAX691 and simply pull-up the /CS of SRAM with 10K resistor to Vout of MAX691 so that whenever the system is turned off and the battery is in use and the original /CS signal comming from some address decoder does not have a valid value, this 10K resistor will automatically deselect the SRAM? 3) How long does a typical 3v lithium battery live in a system using MAX691+SRAM+Battery? None is related to C51 directly, isn`t it? Regards, Oleg |
| Topic | Author | Date |
| /CE propagaion delay in MAX691 | 01/01/70 00:00 | |
| Prop delay in max691 | 01/01/70 00:00 | |
| Batteries | 01/01/70 00:00 | |
| or check out the FLASH+RAM combination | 01/01/70 00:00 | |
| FRAM | 01/01/70 00:00 | |
| another option | 01/01/70 00:00 | |
| ZMD | 01/01/70 00:00 | |
| that's the one | 01/01/70 00:00 | |
| MAX691+battery | 01/01/70 00:00 | |
| what is the problem | 01/01/70 00:00 | |
| How can that be off topic | 01/01/70 00:00 | |
| the matter | 01/01/70 00:00 | |
| It's definitely on-topic! | 01/01/70 00:00 | |
| NEVER design with typicals | 01/01/70 00:00 | |
| MAX691 versus MAX691A, leakage currents | 01/01/70 00:00 | |
| take note, Kai is using the right value | 01/01/70 00:00 | |
| MAX691A | 01/01/70 00:00 | |
| EEPROM | 01/01/70 00:00 | |
| EEprom | 01/01/70 00:00 | |
| And..... | 01/01/70 00:00 | |
| more Qs on /CE | 01/01/70 00:00 | |
| This is more like a valid question | 01/01/70 00:00 | |
timing diagrams | 01/01/70 00:00 |