SH7263 Datasheet, PDF (1382/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 25 USB 2.0 Host/Function Module (USB)
(d) Control Transfer Auto Response Function
This module automatically responds to a normal SET_ADDRESS request. If any of the following
errors occur in the SET_ADDRESS request, a response from the software is necessary.
1. Any transfer other than a control read transfer: bmRequestType ≠ H'00
2. If a request error occurs: wIndex ≠ H'00
3. For any transfer other than a no-data control transfer: wLength ≠ H'00
4. If a request error occurs: wValue > H'7F
5. Control transfer of a device state error: DVSQ = 011 (Configured)
For all requests other than the SET_ADDRESS request, a response is required from the
corresponding software.
25.4.6 Bulk Transfers (PIPE1 to PIPE5)
The buffer memory specifications for bulk transfers (single/double buffer setting, or
continuous/non-continuous transfer mode setting) can be selected. The maximum size that can be
set for the buffer memory is 2 kbytes. The buffer memory state is controlled by this module, with
a response sent automatically for a PING packet/NYET handshake. If MXPS = 0 has been set, the
interrupt specifications are different from those of the other pipes. For details, see section 25.4.3
(3), Maximum Packet Size Setting.
(1) PING Packet Control when the Host Controller Function is Selected
This module automatically sends a PING packet in the OUT direction.
On receiving an ACK handshake in the initial state in which PING packet sending mode is set,
this module sends an OUT packet as noted below. Reception of an NAK or NYET handshake
returns this module to PING packet sending mode. This control also applies to the control
transfers in the data stage and status stage.
1. Sets OUT data sending mode.
2. Sends a PING packet.
3. Receives an ACK handshake.
4. Sends an OUT data packet.
5. Receives an ACK handshake.
(Repeats steps 4 and 5.)
6. Sends an OUT data packet.
7. Receives an NAK/NYET handshake.
Rev. 2.00 Mar. 14, 2008 Page 1348 of 1824
REJ09B0290-0200