Edge-based communication

Abstract

A method comprising: generating a pulse on a data line in a bidirectional edge-based pulse width modulation communication system, the data line connecting a master device to a slave device for communication, wherein generating the pulse comprises: actively driving the data line to a first voltage at the beginning of the pulse and actively driving the data line to a second voltage different from the first voltage at the end of the pulse, the pulse being a trigger pulse indicating identification of a slave device, following the trigger pulse, driving the data line by a slave device, wherein driving the line by the slave device comprises transmitting a synchronization pulse a predetermined time after actively driving the first voltage or after actively driving the second voltage.

Claims

[1] Procedure which includes: Generating a pulse on a data line in a bidirectional edge-based pulse width modulation communication system, the data line connecting a master device to a slave device for communication, wherein generating the pulse comprises: actively driving the data line to a first voltage at the beginning of the pulse and actively driving the data line to a second voltage different from the first voltage at the end of the pulse, wherein the pulse is a trigger pulse indicating an identification of a slave device, after the trigger pulse, driving the data line by a slave device, wherein driving the line by the slave device involves transmitting a Synchronization pulse a predetermined time after the active drive to the first voltage or after the active driving to the second voltage. [2] The method of claim 1, further comprising pulling the line to the second voltage via a resistor after actively driving to the second voltage. [3] Procedure which includes: Generating a pulse on a data line in a bidirectional edge-based pulse width modulation communication system, wherein generating the pulse comprises: actively driving the data line to a first voltage at the beginning of the pulse and actively driving the data line to a second voltage different from the first voltage at the end of the pulse, wherein the pulse is a trigger pulse indicating an identification of a slave device, after the trigger pulse, driving the data line by a slave device, wherein driving the data line by the slave device comprises transmitting a synchronization pulse that overlaps with the trigger pulse. [4] The method of any of claims 1-3, wherein driving the data line by the slave device comprises actively driving the data line to the first voltage and actively driving the data line to the second voltage. [5] A communication device configured to communicate based on an edge-based pulse width modulation method, the device comprising a driver, the driver configured to actively drive a data line to a first voltage and to actively drive the data line to a second voltage after the data line has been actively driven to the first voltage to generate a pulse on the data line, the data line connecting the communication device to another communication device, the device configured to wait a predetermined time after receiving a last falling edge or a last rising edge until generating pulses. [6] The device of claim 5, wherein the driver comprises a push-pull driver. [7] The device of claim 6, wherein the push-pull driver has a tri-state mode. [8] The device of any of claims 5-7, wherein the device is a master device and wherein the pulse comprises a trigger pulse identifying a slave. [9] Device according to one of claims 5-8, wherein the device is a slave. [10] The device according to any one of claims 5-9, wherein the device comprises a line termination, a pull-up resistor and / or a pull-down resistor. [11] System that includes: a master device and at least one slave device, wherein the master device and the at least one slave device are configured to communicate via a bidirectional edge-based pulse width modulation protocol, wherein the master device comprises a push-pull driver coupled to a data line, wherein the master device is configured to generate a trigger pulse using the push-pull driver that identifies the slave device, wherein the slave device is configured to transmit a synchronization pulse that overlaps with the trigger pulse. [12] The system of claim 11, wherein the slave device comprises another push-pull driver coupled to the data line. [13] The system of claim 11, wherein the master device comprises at least one of a line termination, a pull-up resistor, and a pull-down resistor. [14] System that includes: a master device and at least one slave device, wherein the master device and the at least one slave device are configured to communicate via a bidirectional edge-based pulse width modulation protocol, wherein the master device comprises a push-pull driver coupled to a data line, the data line connecting the master device to the slave device, wherein the master device is configured to generate a trigger pulse that identifies the slave device using the push-pull driver, wherein the slave device is configured to send a synchronization pulse on the data line after receiving the trigger pulse.

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