M66290AFP datasheet(37/54 Pages) RENESAS

37 / 54 page

USB DEVICE CONTROLLER

M66290AGP/FP

MITSUBISHI <DIGITAL ASSP>

Function

Name

Bit

Name

Bit

Reset

W/R

Write/Read "0"

If "1" is written into this bit when the selected endpoint is

set to IN, IN buffer effective state flag and the data (byte)

which is written are cleared.

If the IVAL="1" and BCLR="1" is written at the same time,

the data is cleared but the IN buffer effective state flag

is set.(This is effective to transmit 0 length data)

If "1" is written into this bit when the selected endpoint is

set to OUT, OUT buffer effective state flag and the read data

(byte) are cleared.

If it is set to double buffer, the state of buffer which can

be read or write for CPU bus is cleared.

To set the EPi_ACLR, USB bus buffer is cleared.

This bit is not changed when "0" is written.

Buffer clear

If the selected endpoint is set to IN, this becomes IN buffer

effective state flag.

When set to "1", it becomes transmit data set state.

(SIE is available to read)

When the data (byte) which exceeds to the maximum packet size

(MXPS) is written, this bit is set to "1".

In short packet transmit, set this bit to "1" after wrote

the transmit data.

If IVAL="1" and BCLR="1" is written at the same time, the

IN buffer effective state flag is set to "1".

(This is effective to transmit 0 length data)

If the selected endpoint is set to OUT, it becomes to

OUT buffer effective state status.

Status "1" shows that there is data which is available to read.

When Creq bit is "0", the value of this bit is effective.

This bit is not changed when "1" is written.

Flag is not changed when "0" is written.

IN buffer status

BCLR

IVAL

Reserved

15, 14

W/R

USB

S/W

H/W

DMA_DTLN[10:0]

Dreq

BCLR

IVAL

D10

D11

D12

D15

D13

D14

(4-5) DMA_FIFO Control Register (Address : 4Ah)

M66290AFP 데이터시트(PDF) 37 Page - Renesas Technology Corp

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