M66290AFP datasheet(49/54 Pages) RENESAS

49 / 54 page

USB DEVICE CONTROLLER

M66290AGP/FP

MITSUBISHI <DIGITAL ASSP>

D15 to 0

Dreq

tsu(D)

tw(CTRL)

th(D)

twh(Dreq)

td(Dack-Dreq)

D15 to 0

ten(CTRL)

tw(CTRL)

tdis(CTRL)

tv(CTRL)

ta(CTRL)

(4) DMA Transfer Timing -2

(4-2) Read timing -1

Dack

Dreq

twh(Dreq)

td(Dack-Dreq)

Dack

trec(CTRL)

td(Dackh-Dreq)

Data output is established

Data input is established

(note 7)

(note 6)

(note 7)

(note 5)

note 7 : Inactive condition of Dreq is Dack="L"

And when next DMA transfer exists, spec when Dreq turns to active is valid the latest one of twh(Dreq) or td(Dackh-Dreq).

note 5 : Write is done in the overlap period when Dack and WR is active "L".

Spec from the positive edge is valid from the fastest inactive signal.

Spec of pulse width is valid of the overlap period of active "L".

note 6 : Read is done in the overlap period of Dack and RD is active "L"

Spec from the negative edge is valid from the latest signal.

Spec from the positive edge is valid form the fastest inactive signal.

Spec of pulse width is valid during active "L" overlap period.

In case of one word transfer mode (DMA operation mode register : MODE=1)

(4-1) Write timing -1

td(Dackh-Dreq)

td(CTRL-Dack)

M66290AFP 데이터시트(PDF) 49 Page - Renesas Technology Corp

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