Toshiba TLCS-900/H1 Series Manual page 248

(2) Transfer mode
UDC supports FULL speed transfer mode.
• FULL speed device
Control transfer type
Interrupt transfer type
Bulk transfer type
Isochronous transfer type
The following is an explanation of UDC operation in each transfer mode.
The explanation is of data flow up until FIFO.
(a) Bulk transfer type
Bulk transfer type warrants transferring no error between host and function by
using detect error and retry. Basically, 3 phases are used - token, data and
handshake. However, with flow control and a STALL condition, data phase is
changed to hand shake phase, and it become to 2 phases. The UDC holds status of
each endpoint, and flow control is controlled in hardware. Each endpoint condition
can be confirmed using EPx_STATUS register.
92CH21-246
TMP92CH21
2009-06-19