| ??? 02/17/11 15:40 Read: times |
#181149 - It depends on how it was used Responding to: ???'s previous message |
It was possible to boot-load a program into internal SRAM, which then allowed it to be executed. The consequence of that was that one could use the bootloaded code to load an external program memory, BBSRAM in my particular case, and really only for development use, with the parts available in 1985.
Second-sources developed other variants over time, later, of course, some of which worked only with external memory, hence, relying on external flash-programming hardware. This was ISP, but not MCU-based. As the 68HC11 product line was expanded, it became apparent that the ISP die was cast and it became only a matter of time before such features were on the horizon. Memory technology development set the pace, of course. RE |
| Topic | Author | Date |
| Cross-post: "When did ISP become commonplace?" | 01/01/70 00:00 | |
| Pre 1996 | 01/01/70 00:00 | |
| I was doing ISP in 1996 | 01/01/70 00:00 | |
| Roll your own | 01/01/70 00:00 | |
| 1995 | 01/01/70 00:00 | |
| Flash | 01/01/70 00:00 | |
| Single supply | 01/01/70 00:00 | |
| 1998 | 01/01/70 00:00 | |
| 1992 | 01/01/70 00:00 | |
| Sub question: as a built-in feature of the microcontroller | 01/01/70 00:00 | |
| on a limited basis ... | 01/01/70 00:00 | |
| RE: not a widely used feature | 01/01/70 00:00 | |
| When does anything become commonplace | 01/01/70 00:00 | |
| RE: When does anything become commonplace? | 01/01/70 00:00 | |
| Mid 90s | 01/01/70 00:00 | |
| introduced in 1985 | 01/01/70 00:00 | |
It depends on how it was used | 01/01/70 00:00 | |
| one way to answer | 01/01/70 00:00 |