Sony AIT-SDX570, Руководство по техническим характеристикам продукции, Страница: 40 / 162

5. Serial ATA Interface
SONY AIT-2 Turbo drive SDX-570V series Ver.1.0 5-4
5.2.2. Interrupts
INTRQ is used by the selected device to notify the host of an event. The device internal interrupt pending
state is set when such an event occurs. If nIEN is cleared to zero, INTRQ is asserted.
The device shall enter the interrupt pending state when:
1. any command except a PIO data-in command reaches command completion successfully;
2. any command reaches command completion with error;
3. the device is ready to send a data block during a PIO data-in command;
4. the device is ready to accept a data block after the first data block during a PIO data-out command;
5. a device implementing the PACKET Command feature set is ready to receive the command packet and
bits 6-5 in word 0 of the IDENTIFY PACKET DEVICE response have the value 01b;
6. a device implementing the PACKET Command feature set is ready to transfer a DRQ data block during
a PIO transfer;
7. a device implementing the Overlap feature set performs a bus release if the Bus release interrupt is
enabled;
8. a device implementing the Overlap feature set has performed a Bus release and is now ready to
continue the command execution;
9. a device implementing the Overlap feature set is ready to transfer data after a SERVICE command if the
Service interrupt is enabled;
10. Device 0 completes an EXECUTE DEVICE DIAGNOSTIC command. Device 1 does not enter the
interrupt pending state when completing an EXECUTE DEVICE DIAGNOSTIC command.
The device shall not exit the interrupt pending state when the device is deselected.
The device shall exit the interrupt pending state when:
1. the device is selected, BSY is cleared to zero, and the Status register is read;
2. the device is selected, both BSY and DRQ are cleared to zero, and the Command register is written;
3. the RESET- signal is asserted;
4. the SRST bit is set to one.