1. Function Overview
S1R72U16 Development
EPSON 1
Support Manual (Rev.2.00)
1. Function Overview
This LSI includes two functions to support product (system) development. They are controlled by a PC via
the serial interface.
•
History display function
•
USB logo certification support function
The History display function enables the viewing from a PC of various details, including IDE/USB status,
detected USB device type, transfer history, and error information. It also enables connection verification
between the main CPU and the LSI, as well as simple debugging using transfer history and error information.
The USB logo certification support function is used to switch to the test mode corresponding to the electrical
test as part of certification testing. For detailed information, refer to the
S1R72U16 Embedded Host
Compliance Guide
.
Note the following precautions for history information.
•
HS devices connected via an FS USB hub will be recognized as FS devices, not HS devices.
•
Only Bulk Only Transport Mass Storage Class devices are supported.
* UFI subclass(SubClassCode value is 04h) devices are unsupported.
¾
CBI Transport devices such as USB FDDs are unsupported, even if they are Mass Storage Class
devices. Likewise, devices manufactured before the implementation of Mass Storage Class standards
and not conforming to those standards will not be supported.
•
Non-Mass Storage Class devices are not supported.
Note the following precautions regarding operations.
•
These functions are disabled if the LSI switches to Sleep mode while functions are underway. Operation
will resume on recovery from Sleep mode in the state immediately preceding Sleep mode.
