| ??? 06/15/05 21:35 Read: times |
#95040 - who should test it? Responding to: ???'s previous message |
Why should the user test the functionality of what is built into a chip? Do you test if the '51s of your choice execute all commands as stated in datasheet?
Btw., an internal reset circuit is superior to (common) external as it holds the reset until the crystal starts and stabilises. Besides this, according to datasheet, it contains also an internal voltage regulator for the processor core and peripherals. (No personal experience, good or bad, as the device which uses AT89C51ED2 of a design of my colleague uses an external reset - the reason is as Kai stated - the surrounding logic needs to be reset when the voltage drops slightly below 5V while the internal monitor obviously goes far below that (the chip is specified to work as low as 2.7V) (and the reset chip was there already as the design was originally plain AT89C52-based...)) Jan Waclawek |
| Topic | Author | Date |
| AT89C51RD2 without supervisor IC | 01/01/70 00:00 | |
| RC is never good | 01/01/70 00:00 | |
| watchdog ad absurdum | 01/01/70 00:00 | |
| and uses a bunch of pins | 01/01/70 00:00 | |
| wd | 01/01/70 00:00 | |
| paranoia revisited - wd 2 | 01/01/70 00:00 | |
| when the full story | 01/01/70 00:00 | |
| WD3 | 01/01/70 00:00 | |
| if code run astray | 01/01/70 00:00 | |
| Has been discussed before | 01/01/70 00:00 | |
| External ones are better | 01/01/70 00:00 | |
| External ones are better in one respect | 01/01/70 00:00 | |
| Yes, but... | 01/01/70 00:00 | |
| Nope, never use an external when | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| Combined Watchdogs | 01/01/70 00:00 | |
| External better in another respect | 01/01/70 00:00 | |
| I'm using the internal and works well | 01/01/70 00:00 | |
| works well - how do you know | 01/01/70 00:00 | |
| who should test it? | 01/01/70 00:00 | |
| nobody | 01/01/70 00:00 | |
| the manufacturer should | 01/01/70 00:00 | |
| Design Verification | 01/01/70 00:00 | |
one off | 01/01/70 00:00 | |
| The meaning of "well" | 01/01/70 00:00 |