@@ -11,10 +11,10 @@ The SDIO bus has two ends, named host and device. All communication starts when
...
@@ -11,10 +11,10 @@ The SDIO bus has two ends, named host and device. All communication starts when
- D0-3 signal: four data lines. The DAT1 signal cable is multiplexed as the interrupt line. In 1-bit mode, DAT0 is used to transmit data. In 4-bit mode, DAT0 to DAT3 are used to transmit data.
- D0-3 signal: four data lines. The DAT1 signal cable is multiplexed as the interrupt line. In 1-bit mode, DAT0 is used to transmit data. In 4-bit mode, DAT0 to DAT3 are used to transmit data.
- CMD signal: used by the host to send commands and the device to respond to commands.
- CMD signal: used by the host to send commands and the device to respond to commands.
**Figure 1** Connections between the host and devices in SDIO<aname="fig1185316527498"></a>
**Figure 1** Connections between the host and devices in SDIO<aname="fig1185316527498"></a>
The SDIO interface defines a set of common methods for operating an SDIO device, including opening and closing an SDIO controller, exclusively claiming and releasing the host, enabling and disabling devices, claiming and releasing an SDIO IRQ, reading and writing data based on SDIO, and obtaining and setting common information.
The SDIO interface defines a set of common methods for operating an SDIO device, including opening and closing an SDIO controller, exclusively claiming and releasing the host, enabling and disabling devices, claiming and releasing an SDIO IRQ, reading and writing data based on SDIO, and obtaining and setting common information.
