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US 8,948,276 B2Granted
Semiconductor device and data transmission method
AssigneeRenesas Electronics Corporation
InventorShunichi Kaeriyama
Life of this patent
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Abstract
In a semiconductor device, a transmitting circuit generates a delayed data signal and a first delayed retransmission request signal by delaying a data signal and a first retransmission request signal, respectively, and outputs a pulse signal at an edge of the delayed data signal and the first delayed retransmission request signal and prohibits output of the pulse signal at an edge of the first delayed retransmission request signal during a specified period across an edge of the delayed data signal.
Claims13
A semiconductor device comprising:
- a transmitting circuit that operates in a first power supply system and outputs a pulse signal based on an input data signal and an input first retransmission request signal;
- a receiving circuit that operates in a second power supply system different from the first power supply system and restores a delayed data signal based on the pulse signal;
- and
- an insulation coupler that couples the transmitting circuit and the receiving circuit by a magnetic field or an electric field, wherein
- the transmitting circuit generates the delayed data signal and a first delayed retransmission request signal by delaying the input data signal and the first retransmission request signal, respectively, and outputs the pulse signal at an edge of the delayed data signal and at an edge of the first delayed retransmission request signal and prohibits output of the pulse signal at the edge of the first delayed retransmission request signal during a first specified period from a first time before the edge of the delayed data signal to a second time after the edge of the delayed data signal.
2 more elements
A data transmission method comprising:
- generating a delayed data signal and a first delayed retransmission request signal by delaying an input data signal and a first retransmission request signal, respectively;
- and
- outputting a pulse signal at an edge of the delayed data signal and at an edge of the first delayed retransmission request signal, and prohibiting output of the pulse signal at the edge of the first delayed retransmission request signal during a specified period from a first time before the edge of the delayed data signal to a second time after the edge of the delayed data signal.
Dependencies are inferred from the claim text.