| ??? 09/13/08 22:52 Read: times |
#158253 - More detail, please. Where does the code reside? Responding to: ???'s previous message |
Dilip Kulkarni,
If it's in the NVRAM, it could be that the NVRAM is too slow. That shouldn't be the case, however, unless your 89C52 is very fast. The slowest DS1230's are 120 ns parts, which should be readily useable with properly connected 12-clockers, and even most 6-clockers. Could you tell us the exact and complete part numbers and clock (probably pin 19) frequency? If the NVRAM (I use these DS1230's very often, even with one-clockers) is selected (via pin 20) using A15, and output-enabled (via pin 22) by /Rd, then the timing should be pretty generous even with the fastest ATMEL 89C52 types. Are you using both MCU's in the exact same physical circuit? Do you have an oscilloscope available? RE |
| Topic | Author | Date |
| 89C51 works but 89C52 does not | 01/01/70 00:00 | |
| /EA not connected | 01/01/70 00:00 | |
| 89c51 works 89c52 does not | 01/01/70 00:00 | |
| Why would you conclude that, Erik? | 01/01/70 00:00 | |
| More detail, please. Where does the code reside? | 01/01/70 00:00 | |
| i faced the same problem...... | 01/01/70 00:00 | |
| wong direction | 01/01/70 00:00 | |
| Try Other 89C52 Part | 01/01/70 00:00 | |
| No good news... | 01/01/70 00:00 | |
| wrong spot ... | 01/01/70 00:00 | |
| but your problem was with 89c52 | 01/01/70 00:00 |