Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1997-05-15
1999-03-23
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
395825, H03M 100
Patent
active
058866582
ABSTRACT:
A novel serial port interface system and method are disclosed. The serial port interface system achieves a three-pin interface mode with only a serial data input pin, a serial data output pin, and a serial clock pin by allocating a bit in an on-chip register to identify a three-pin conversion-done mode. In this three-pin mode, the serial data output pin signals an external device that data is ready to be accessed. Also disclosed with this three-pin conversion-done mode is a single conversion data read and a continuous conversion data read that may be selected through two separate bits in an on-chip register. In another aspect, a multiple register access capability is disclosed that allows multiple on-chip registers to be accessed with a single read/write command. This is accomplished by allocating a register select address in a command register to identify a group of registers, such as all of the set-up registers (gain, offset and configuration). An invalid command lock mode is also disclosed that places the serial port interface in a hold state, if an invalid command is decoded, to protect on-chip registers from corruption. Control of the serial port interface is removed from an external device until a specific restart sequence is applied.
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Amar Aryesh
Del Signore Bruce P.
Johnston Jerome E.
Crystal Semiconductor Corporation
Hoff Marc S.
Jean Pierre Peguy
Peterman Brian W.
Violette J. P.
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