Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral configuration
Patent
1998-02-23
2000-03-14
Lee, Thomas C.
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral configuration
36523001, 36523003, 36523008, 711102, G06F 1314
Patent
active
060386177
ABSTRACT:
A device for configuring a serial ROM. In accordance thereto, a read instruction is serially transmitted to the input of the serial ROM. Thereafter, an x-bit address of all zeros is serially transmitted to the input of the serial ROM. Each bit of the instruction and x-bit address is transmitted to the input of this serial ROM on a rising edge of a clock also inputted to the serial ROM. The output of the serial ROM is connected to a precharged sense node. Prior to the serial ROM outputting data in response to the x-bit address, the serial ROM will discharge the sense node to ground if the serial ROM is one of the first type of serial ROMs. However, if the serial ROM is a second type, the sensing node will not be discharged to ground prior to output of the data. Immediately after transmission of the x-bit address, a configuration register is set to indicate the type of serial ROM. In this regard, the configuration register is set according to whether the sense node is discharged or not upon complete transmission of the x-bit address.
REFERENCES:
patent: 5604880 (1997-02-01), Dipert
patent: 5715207 (1998-02-01), Cowell
patent: 5751996 (1998-05-01), Glew et al.
Elamin Adbelmoniem
Hood Jeffrey C.
Lee Thomas C.
National Instruments Corporation
Stephenson Eric A.
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