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TMP92CZ26A
92CZ26A-421
(2) Transfer mode
UDC support transfer mode in FULL speed.
• FULL speed device
Control transfer type
Interrupt transfer type
Bulk transfer type
Isochronous transfer type
Following is explanation of UDC operation in each transfer mode.
Explanation of data flow is explanation 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 (token, data and handshake are
used) are used. However, if flow control and STALL condition, data phase is
changed to hand shake phase, and it become to 2 phases. UDC holds status of
every each endpoint, and it control flow control in hardware. Each endpoint
condition can be confirmed by using EPx_STATUS register.