| 摘要 |
The present invention relates to communication using a serial peripheral interface. The serial peripheral interface (20) connects a master device (10) and at least one slave device (1 to 3). The serial peripheral interface (20) comprises a slave selection line (25). The slave device 1 may signal an interrupt request to the master device (10) by changing a state of the slave selection line (25) from a first state indicative of an inactive state to a second state indicative of an active state. The slave selection line (25) may be connected to an input/output stage (52) of the slave device (1). The input/output stage enables the slave selection line (25) to remain in the first state if the master device (10) or the slave device (1) does not change the state of the slave selection line (25) and enables the slave selection line (25) to switch to the second state if the master device (10) or the slave device (1) desires to change the state of the slave selection line (25). |
