M66596FP datasheet(91/131 Pages) RENESAS

91 / 131 page

M66596FP/WG

rev .1.00

2006.3.14

page 91 of 127

3.8.1

Interval counter in the Host mode

3.8.1.1 Overview

Set the interval of a transaction as the IITV bit of PIPEPERI at the Interrupt transfer. This controller sends out the

token of Interrupt transfer according to the IITV bit.

3.8.1.2 Initialization of a counter

The conditions on which this controller initializes an interval counter are as follows.

(1) H/W reset

IITV

bit is initialized.

(2) S/W reset

IITV

bit is initialized.

(3) The return from Low-power sleep state

An IITV bit is initialized.

(4) Buffer memory initialization by ACLRM

A count is initialized although an IITV bit is not initialized. By setting an ACLRM bit to 0, the setting value of

IITV

is counted from the beginning.

In the following cases, an interval counter is not initialized.

(1) USB bus reset, USB suspensd

An IITV bit is not initialized. By setting a UACT bit to 1, a count is started from the value before considering

as USB bus reset or a USB suspend state.

3.8.1.3 When a token is not transmitted

When as follows, a token is not transmitted even if it is the transmitting timing of a token. In such a case,

execution of a transaction is tried at the next interval.

(1) When PID is set as NAK or STALL

(2) When a buffer memory is not empty at the time of transmission of the IN direction (reception).

(3) When there is no transmitting data in a buffer memory at the time of transmission of the OUT direction

(transmission).

3.9 Isochronous transfers(PIPE1-2)

The controller is equipped with the following functions pertaining to isochronous transfers.

(1)

Notification of isochronous transfer error information

(2)

Interval counter (specified by the IITV bit)

(3)

Isochronous IN transfer data setup control (IDLY function)

(4)

Isochronous IN transfer buffer flush function (specified by the IFIS bit)

(5)

SOF pulse output function

The controller does not support the High-Bandwidth transfers of isochronous transfers.

M66596FP 데이터시트(PDF) 91 Page - Renesas Technology Corp

M66596FP 데이터시트(HTML) 91 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

데이터시트 다운로드

링크 URL