Internal serial interface
First Claim
Patent Images
1. A communications interface device comprising:
- a radio frequency front end configured to receive input data signals and a first clock signal;
a serial interface configured to receive data signals from the radio frequency front end and that includes a transmit block that provides data and enable signals to at least one receive block, the receive block being associated with a component other than the radio frequency front end; and
a clock generator configured to be enabled by the radio frequency front end to provide a second clock signal when data is to be transmitted via the interface so that the transmit block of the serial interface receives the second clock signal, the clock generator being activated by the radio frequency front end when data received by the radio frequency front end indicates that the data being provided to the at least one receive block has changed, the clock generator configured to provide a clock signal and a transmit signal to the transmit block of the interface when enabled by the radio frequency front end, and the clock generator and the transmit block being disabled when the data has been transmitted.
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Abstract
A simplified serial interface for a communications device. The serial interface includes an RF front end and a transmit block and at least one receive block located on different dies. The receive block is activated by a clock generator that is separate than the system clock. The at least one receive block can inhibit transmission of an enable signal to the receive block and inhibit operation of an oscillator of the interface.
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Citations
19 Claims
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1. A communications interface device comprising:
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a radio frequency front end configured to receive input data signals and a first clock signal; a serial interface configured to receive data signals from the radio frequency front end and that includes a transmit block that provides data and enable signals to at least one receive block, the receive block being associated with a component other than the radio frequency front end; and a clock generator configured to be enabled by the radio frequency front end to provide a second clock signal when data is to be transmitted via the interface so that the transmit block of the serial interface receives the second clock signal, the clock generator being activated by the radio frequency front end when data received by the radio frequency front end indicates that the data being provided to the at least one receive block has changed, the clock generator configured to provide a clock signal and a transmit signal to the transmit block of the interface when enabled by the radio frequency front end, and the clock generator and the transmit block being disabled when the data has been transmitted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communications device comprising:
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a radio frequency front end configured to receive input data signals and a first clock signal; a serial interface configured to receive data signals from the radio frequency front end and that includes a transmit block configured to provide data and enable signals to at least one receive block, the at least one receive block being associated with a downstream device other than the radio frequency front end, the downstream device configured to receive the data from the at least one receive block, the downstream device including a power on reset detector configured to determine when the at least one receive block and downstream device are capable of receiving data, the downstream device configured to communicate with the at least one receive block to inhibit enablement of the receive block until the receive block and downstream device are capable of receiving data, and the power on reset detector configured to control the enable signal via a switch to inhibit the transmission of the enable signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification