Safety digital input and output device, system and control method thereof
A technology for secure digital input and output devices, applied in the direction of multi-programming devices, electrical digital data processing, digital data processing components, etc., can solve the impact of ability, wake up SDIO device SDIO host time increase, SDIO device can not receive SDIO device and other issues to achieve the effect of reducing power consumption
Active Publication Date: 2017-10-24
MEDIATEK INC
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- Description
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- Application Information
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Problems solved by technology
However, in some cases, if the level of the supply voltage is reduced to a certain extent, the ability of the SDIO device to receive input signals sent by the SDIO host may be affected
This is due to the fact that the receiver of an SDIO device has difficulty properly decoding the high frequency signals defined in the SDIO specification when operating with a low supply voltage
Worst of all, the SDIO device cannot receive the signal used to wake the SDIO device from idle mode
This adverse effect increases the time to wake up the SDIO device and properly respond to the SDIO host
Method used
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[0020] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.
[0021] figure 1 is a schematic diagram of the SDIO host 100...
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The invention discloses a safe digital input and output device, system and control method thereof. The above system includes a safety digital input and output device and a safety digital input and output host. The safety digital input and output device has a first operation mode and a second operation mode, and includes: a register for storing a control value allowing the safety digital input and output device to switch to the first operation mode; and a first mode control circuit for transparently The first signal allowing the safety digital input and output device to switch to the second operation mode is received through the data bus. The safety digital input and output host is used to control the safety digital input and output device, and includes: a second mode control circuit, used to send the first signal to the safety digital input and output device through the data bus; and a safety digital input and output host control module, used to issue commands to write control values to registers. The above device, system and control method thereof can reduce power consumption.
Description
[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 861,378, filed August 1, 2013. The entire contents of the aforementioned application are hereby incorporated by reference. technical field [0003] The present invention relates to secure digital input and output (Secure Digital Input Output, SDIO), and in particular, the present invention relates to SDIO devices, systems and related control methods, so as to place SDIO devices in sleep mode and bring the aforementioned SDIO devices from sleep to mode wakeup. Background technique [0004] SDIO is an interface standard extended from the Secure Digital (SD) standard. It can not only be applied to storage devices such as flash memory cards, but can also be used to connect Wi-Fi wireless network cards, global positioning systems, etc. (Global Positioning System, GPS) receivers and peripheral devices such as Bluetooth adapters. Generally, an SDIO card...
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IPC IPC(8): G06F1/32G06F9/48
CPCG06F1/3206G06F21/82G06F1/266G06F1/3275G06F1/3278Y02D10/00
Inventor 吴智斌
Owner MEDIATEK INC