S2R72V27B08 查看數據表（PDF） - Seiko Epson Corp

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S2R72V27B08

Supports HS (480 Mbps), FS (12 Mbps), and LS (1.5 Mbps) transfer

Seiko Epson Corp 

4. Explanation of Functions

4.5 CPU-I/F

This LSI is connected to the CPU via a 16-bit interface. Endian settings can be set as Big Endian or

Little Endian in 16-bit steps. For Big Endian, registers with even addresses can be accessed above the

bus (CD[15:8]), while registers with odd addresses can be accessed below the bus (CD[7:0]). For

Little Endian, registers with even addresses can be accessed below the bus (CD[7:0]), while registers

with odd addresses can be accessed above the bus (CD[15:8]).

The bus mode can be set to either Strobe mode for access using high/low strobe (XWRH/XWRL) or

Byte Enable mode for access using high/low byte enable (XBEH/XBEL) for writing the first or last 8

bits. Endian and bus mode is set by the CPUIF_MODE register immediately cancelling of hard reset.

The CPU-I/F on this LSI includes 1-ch DMA (slave).

The registers that can be accessed will depend on the power management state. For details, refer to

the LSI Technical Manual.

4.6 USB Device I/F

This LSI supports High-Speed specification USB device functions complying with the USB 2.0

(Universal Serial Bus Specification Revision 2.0) standards.

4.6.1

Speed Mode and Transfer Type

This LSI’s USB device function supports HS (480 Mbps) and FS (12 Mbps) speed modes.

The speed mode is set automatically by the speed negotiation performed when resetting the

bus. For example, HS transfer mode is selected automatically by speed negotiation if

connected to a USB host that supports HS speed mode. In addition, the register can be set

so that FS speed mode is always selected in speed negotiations.

All transfer types stipulated under the USB 2.0 standard are supported, including control

transfers (endpoint 0), bulk transfers, interrupt transfers, and isochronous transfers.

4.6.2

Resources

4.6.2.1

Endpoint

This LSI’s USB device function includes endpoint 0 and five standard

endpoints. Endpoint 0 supports control transfers. The standard endpoints

support bulk transfers, interrupt transfers, and isochronous transfers. The

standard endpoint numbers, maximum packet size, and transfer direction

(in/out) can be set as desired.

S2R72V27 Data Sheet (Rev. 1.00)

EPSON

7

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