AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 288
![no-image](/images/no-image-200.jpg)
AT90USB1286-16MU
Manufacturer Part Number
AT90USB1286-16MU
Description
Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90USB1286-16MU.pdf
(434 pages)
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For IN transfer, it indicates the Toggle that will be used for the next packet to be sent. This is not
relative to the current bank.
• 1-0 - NBUSYBK1:0 - Busy Bank Flag
Set by hardware to indicate the number of busy bank.
For IN endpoint, it indicates the number of busy bank(s), filled by the user, ready for IN transfer.
For OUT endpoint, it indicates the number of busy bank(s) filled by OUT transaction from the
host.
00b All banks are free
01b 1 busy bank
10b 2 busy banks
11b Reserved.
• 7-3 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 2 - CTRLDIR - Control Direction (Flag, and bit for debug purpose)
Set by hardware after a SETUP packet, and gives the direction of the following packet:
- 1 for IN endpoint
- 0 for OUT endpoint.
Can not be set or cleared by software.
• 1-0 - CURRBK1:0 - Current Bank (all endpoints except Control endpoint) Flag
Set by hardware to indicate the number of the current bank:
00b Bank0
01b Bank1
1xb
Can not be set or cleared by software.
• 7 - FIFOCON - FIFO Control Bit
For OUT and SETUP Endpoint:
Reserved.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
FIFOCON
R/W
7
0
R
7
0
-
NAKINI
R/W
R
6
0
6
0
-
RWAL
R/W
5
0
R
5
0
-
NAKOUTI
R/W
4
0
R
4
0
-
RXSTPI
R/W
3
0
R
3
0
-
CTRLDIR
RXOUTI
R/W
2
0
R
2
0
STALLEDI
R/W
R
1
0
1
0
CURRBK1:0
TXINI
R/W
R
0
0
7593A–AVR–02/06
0
0
UESTA1X
UEINTX
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