M66290AGP Datasheet, PDF (10/54 Pages) Mitsubishi Electric Semiconductor – USB DEVICE CONTROLLER

MITSUBISHI <DIGITAL ASSP>
M66290AGP/FP
USB DEVICE CONTROLLER
(1-5) Isochronous Status Register (Address : 0Ah)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
OVRN CRCE
FMOD
FRNM[10:0]
Bit
Bit
Name
Name
Function
Reset
W/R
H/W S/W USB
In isochronous transfers (OUT/IN), when over-run or under-run is
occurred to the endpoint buffer, this flag is set at the timing of the
receive end of the OUT/IN token packet.
Over run is occurred when delayed to read the received data from
the endpoint buffer, and means that could not received. Over run is
occurred when the direction of transmission is OUT.
Also the received data has CRC or bit stuffing error, this flag is set.
Under run is occurred when delayed to write the transmit data into the
15 OVRN Over run error
endpoint buffer, and means that could not transmitted. Under-run is
occurred when the direction of transmission is IN.
When a state above is occurred, endpoint buffer notready interrupt is
occurred.
When "0" is written, status flag is cleared.
When "1" is written, flag is not changed.
W/R 0 0 -
In isochronous transfers(OUT), if the received data has CRC or
bit stuffing error, this flag is set at the timing of the end of transaction.
When a state above is occurred, endpoint buffer notready interrupt is
14 CRCE Receive data error occurred.
W/R 0 0 -
When "0" is written, status flag is cleared.
When "1" is written, flag is not changed.
13 to 12 Reserved
Write/Read "0"
Select the renewal timing of the flame number to be stored
to FRNM[10:0].
Frame number
11 FMOD
mode
0 : Renew the flame number when SOF is received .
1 : In isochronous transfer, renew the flame number at the
timing of the end of transaction.
FRNM
10 to 0
[10:0]
Frame number
Stores the flame number.
The timing to renew the stored flame number is selectable by set
FMOD.
W/R 0 0 -
R 000h 000h -
9