Self-progamming of on-chip program memory for microcontroller at clock start-up
US5504903A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Feb 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/445
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microcontroller fabricated on a semiconductor chip is adapted, when operating, to execute programs and instructions and, in response, to generate control signals to selectively control external apparatus. A clock generates timing signals to control the timing of the microcontroller execution and operation. An on-chip program memory has space avilable for storing a program to be executed by the microcontroller in sequential steps in successive address locations of the program memory. An instruction stored in unerasable memory on the chip initiates self-programming of the program memory with the program to be executed by the microcontroller by enabling a pointer timed by the clock to alternately read addresses containing steps of the program to be executed from off-chip memories and to write same into successive addresses of the on-chip program memory by incrementing the latter addresses with each step to be written therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.