Hitachi H8S/2215 Series Hardware Manual page 499

• • • • UEPIRnn_3
Bit Bit Name
7 to D15 –D8
0
• UEPIRnn_4
Bit Bit Name
7 to D7 –D0
0
This manual assumes that endpoint information (EPINFO data) is configured based on the
Bluetooth standard shown in figure 15.2. If endpoint data is configured in a configuration other
than that shown in figure 15.2, care must be taken for the correspondence between endpoint
number, Configuration/Interface/Alternate number and maximum packet size, and register name
and bit name. For details, refer to section 15.7, Endpoint Configuration Examples.
Endpoint data configured based on the Bluetooth standard can be specified as shown in table 15.2.
Endpoint data shown in table 15.2 includes unused endpoints (EP4i, EP4o, and EP5i). To load all
EPINFO data items from UEPIR00_0 to UEPIR22_4 correctly, unused end pints must also be
dummy written as shown in table 15.2.
In addition, to prevent unused endpoints from being accessed from the host, descriptor information
for the unused endpoints must not be returned in the enumeration phase at connection. This
correctly informs the host of usable endpoint information and enables access control for unused
endpoints. If descriptor information for the unused endpoints is returned to the host, the USB
cannot operate correctly when the host accesses the unused endpoint.
Note that endpoint data information must match the corresponding descriptor information to be
returned to the host . Otherwise, the USB cannot operate correctly. For example, if the descriptor
Initial Value R/W
— R/W
Initial Value R/W
— R/W
Description
Endpoint internal address (D15 to D0 16-bit
configuration)
Set UEPIR00_3, UEPIR00_4 = H'0000
Set UEPIR01_3, UEPIR01_4 = H'0001
:
Set UEPIR21_3, UEPIR21_4 = H'0015
Set UEPIR22_3, UEPIR22_4 = H'0016
Description
Endpoint internal address (D15 to D0 16-bit
configuration)
Set UEPIR00_3, UEPIR00_4 = H'0000
Set UEPIR01_3, UEPIR01_4 = H'0001
:
Set UEPIR21_3, UEPIR21_4 = H'0015
Set UEPIR22_3, UEPIR22_4 = H'0016
Rev. 3.0, 10/02, page 441 of 686