Toshiba TLCS-900/H1 Series Manual page 397

Original cmos 32-bit microcontroller

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Table of Contents

(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.