EPROM emulator for selectively simulating a variety of different paging EPROMs in a test circuit
US5003507A · kind A · utility
Inventor
Key dates
| Filing date | Sep 6, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Sep 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/102
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An EPROM emulator makes use of a simple device with a housing connected to a eprom header which serves to connect the device to a circuit board in conjunction with a microprocessor emulator. Inside the housing are paging and data select circuits and a set of SRAM which are used in place of a traditional EPROM to hold the programming information. To program the device, the EPROM simulator is connected to the circuit board in place of an eprom. A switch on the housing is then turned to place the device in programming mode. The same switch also determines how the device is programmed by accessing the appropriate data lines for the number of pages of EPROM memory which are being emulated. After the switch is properly selected, the emulator is programmed by sending the data through the eprom socket on the circuit board via the microprocessor emulator. After the device is programmed, the switch on the housing is turned to place the device in read-only mode so that it can simulate an EPROM. In addition to the external switch, there are internal jumpers which are set to determine the type of EPROM which is to be emulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.