M66290AFP datasheet(19/54 Pages) RENESAS

19 / 54 page

USB DEVICE CONTROLLER

M66290AGP/FP

MITSUBISHI <DIGITAL ASSP>

Bit

Name

Function

Reset

00h

W/R

Write/Read "0"

EPB_

NRDY

[5:0]

Endpoint5-0 buffer

not ready

interrupt

To IN/OUT token of each endpoint, if the set of response PID is not

NAK("00") and if buffer is in not ready state (receive/transmit disabled),

the bit which corresponds to the number of endpoint changes to "1".

(If the endpoint is control transfer or bulk transfer or interrupt transfer,

NAK response is executed)

If the endpoint is set to isochronous transfer, M66290A does not execute

NAK response, but when over-run or under-run of endpoint buffer

occurred, this bit changes to "1" at the timing of token packet receive end.

If it is set to isochronous (OUT), and if received data has error such as

CRC, this bit changes to "1" at the timing of transaction end.

When "0" is written, status flag is cleared.

When "1" is written, flag is not changed.

5 to 0

Reserved

15 to 6

W/R

USB

S/W

H/W

EPB_NRDY[5:0]

D10

D11

D12

D15

D13

D14

(2-7) Interrupt Status Register 2 (Address : 1Ch)

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