M66596FP datasheet(95/133 Pages) RENESAS

95 / 133 page

M66596FP/WG

rev .1.00

2006.3.14

page 93 of 127

3.9.2

DATA-PID

Because High-Bandwidth transfers are not supported, In the Peripheral mode, the DATA-PID added with the

USB 2.0 standard is supported as indicated below.

(1) IN direction:

(a) DATA0: Sent as data packet PID

(b) DATA1: Not sent

(c)

DATA2: Not sent

(d) mDATA: Not sent

(2) OUT direction(when using Full-Speed operation):

(a) DATA0: Received normally as data packet PID

(b) DATA1: Received normally as data packet PID

(c)

DATA2: Packet is ignored

(d) mDATA: Packet is ignored

(3) OUT direction(when using Hi-Speed operation):

(a) DATA0: Received normally as data packet PID

(b) DATA1: Received normally as data packet PID

(c)

DATA2: Received normally as data packet PID

(d) mDATA: Received normally as data packet PID

3.9.3

Interval counter

3.9.3.1 An overview of operation

The isochronous interval can be set using the IITV bit of the PIPEPERI register. In the Peripheral mode, interval

counter is used for the function of a table. In the Host mode, the transmitting timing of a token is generated.

Table 3.26 The function of an interval counter in the Peripheral mode

Direction

Function

Detection conditions

IN buffer flush

When a token cannot be normally received in the

interval frame during an isochronous IN transfer

OUT

Notification of a token not being received

When a token cannot be normally received in the

interval frame during an isochronous OUT transfer

The interval count is carried out when an SOF is received or for interpolated SOFs, so the isochronism can be

maintained even if an SOF is damaged. The frame interval that can be set is 2IITV(u) frames.

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