4. Functions
S1R72U16 Data Sheet (Rev. 2.00) EPSON 5
4. Functions
4.1 Main CPU I/F
This LSI can be used as either of the following connections to the main CPU.
• IDE bus connection (interface voltage: 3.3 V)
• CPU bus connection (interface voltage: 1.8 V to 3.3 V)
Bus connection is selected by using the mode setting pin CPUxIDE (PORT02).
4.1.1 IDE Device Controller
This
block operates when IDE bus connection is selected. It supports ATA/ATAPI-6.
• PIO transfer modes 0 to 4
• Multi Word DMA transfer modes 0 to 2
• Ultra DMA transfer modes 0 to 5
4.1.2 CPUIF
This
block operates when CPU bus connection is selected. The registers used to control
this LSI are ATA task file registers. It supports PIO and DMA (*) transfer.
* For DMA transfer, the main CPU must provide a DMA master function that complies
with the DMA specifications of this LSI.
4.2 USB Host
The USB host function complies with the USB 2.0 (Universal Serial Bus Specification Revision 2.0)
standards. It supports HS (480 Mbps) and FS (12 Mbps) speed modes. USB host function is
controlled by the Bridge Sequencer block inside the LSI. USB devices that can be connected to this
LSI are bulk-only transport mass storage class devices (e.g., USB memory) and HUB devices.
4.3 GPI
These are the mode setting pins for selecting the command system, number of connected devices, and
interface to the main CPU.
For detailed information, see the S1R72U16 Technical Manual.
4.4 GPO
These pins are used to issue notification of USB storage device connections, internal PLL operation
status, and NSF (No Silent Failure).
For detailed information, see the S1R72U16 Technical Manual.
