US 2004/0017869 A1Published application

Method for transmitting data over a data bus with minimized digital inter-symbol interference

AssigneeMaxtor Corporation

InventorsDana Hall, Bruce Leshay

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Abstract

A method for transmitting data via a data bus with minimized digital control and data inter-symbol interference. The voltage level on the bus is not permitted to reach the bus negated quiescent voltage level set by the bus terminator voltage. Additional time is provided for data detection circuitry to detect a first segment of data transferred over the bus. A pause time is enabled after the bus has been at idle/paused for a prolonged period. After the first segment of data has been transferred, the method returns to normal operation by pausing for a normal period of time for data detection circuitry to detect subsequent segments of data transferred over the bus. Additionally, during prolonged synchronous data transfers with unchanged data bits, the data bus is inverted and driven for further regulating the data bus voltage.

Claims12

Dependent claims

A method for controlling transmission of data from a sender to a receiver via a data bus to minimize digital inter-symbol interference, comprising the steps of:

(A) executing a start data transfer command;
(B) waiting for a FIFO register at the sender to be holding data and determining when the FIFO is holding data;
(C) driving the data held in the FIFO on to the data bus;
(D) pausing a first predetermined period of time for the data to be set up on the data bus;
and
(E) asserting a REQ command;
(F) pausing a second predetermined period of time longer than the first predetermined period of time for data to be sensed by data detection circuitry, wherein pausing for the second predetermined period of time provides REQ detection circuitry additional time to sense data being transmitted on the data bus, thereby minimizing digital inter-symbol interference during data transmission from the sender to the receiver.

4 more elements

Dependencies are inferred from the claim text.