Because SPBs run at low speeds and require few electrical connections, they are frequently used in applications in which battery power must be conserved.įor example, the PC motherboard in a laptop computer might use an I☬ bus to communicate with a low-speed device that monitors the battery level. Typically, SPBs are used in cost-sensitive applications in which low pin counts and simple connections are more important than data transmission speed. An integrated circuit requires fewer pins to connect to a serial bus than to a parallel bus, which transmits multiple bits of data per clock cycle. SPBs are frequently used to connect low-speed peripheral devices to motherboard chipsets and System on a Chip (SoC) modules. For more information, see SPB Controller Drivers and SPB Peripheral Device Drivers. Starting with Windows 8, hardware vendors can supply Windows drivers to directly control their SPB controllers and their SPB-connected peripheral devices, and to make these devices available for use by the operating system and by applications. In versions of Windows before Windows 8, the operating system obtained information from SPB-connected devices on a PC motherboard only indirectly through the platform firmware. This driver might support a family of peripheral devices across a variety of hardware platforms that provide compatible SPBs. The hardware vendor for an SPB-connected peripheral device provides an SPB peripheral driver to manage the hardware functions in the peripheral device. This driver might support a family of similar controller devices. The hardware vendor for an SPB controller device provides an SPB controller driver to manage the hardware functions in the controller. The SPB category includes buses such as I☬ and SPI. New to the game? Got a question about the subreddit? Chances are that it may have already been answered! Head on over to the F.A.Q page to find out.This section describes how to write a driver for a simple peripheral bus (SPB) controller device or for a peripheral device that is connected to an SPB. If it's urgent, then please message the moderators. Please correctly report posts if they break a rule.
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