Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet

572

SAM9G25 [DATASHEET]

11032C–ATARM–25-Jan-13

–

 (for Isochronous OUT endpoints) (Read-only):

This bit is set by hardware if the last received data is corrupted (CRC error on data).

This bit is updated by hardware when new data is received (Received OUT Data bit).

–

 (for High Bandwidth Isochronous IN endpoints):

This bit is set at the end of a microframe in which at least one data bank has been transmitted, if less than the number of transac-
tions per micro-frame banks (UDPHS_EPTCFGx register NB_TRANS) have been validated for transmission inside this 
microframe.

This bit is reset by UDPHS_EPTRST register EPT_x (reset endpoint) and by UDPHS_EPTCTLDISx (disable endpoint).

– (for High Bandwidth Isochronous IN endpoints)

This bit is set when flushing unsent banks at the end of a microframe.

This bit is reset by UDPHS_EPTRST register EPT_x (reset endpoint) and by EPT_CTL_DISx (disable endpoint).

–

:

These bits are set by hardware to indicate the number of the current bank.

Note:

The current bank is updated each time the user:
- Sets the TX Packet Ready bit to prepare the next IN transfer and to switch to the next bank.
- Clears the received OUT data bit to access the next bank.

This bit is reset by UDPHS_EPTRST register EPT_x (reset endpoint) and by UDPHS_EPTCTLDISx (disable endpoint).

These bits are set by hardware to indicate the number of busy banks.

: It indicates the number of busy banks filled by the user, ready for IN transfer.

: It indicates the number of busy banks filled by OUT transaction from the Host. 

Byte count of a received data packet.

This field is incremented after each write into the endpoint (to prepare an IN transfer).

This field is decremented after each reading into the endpoint (OUT transfer).

This field is also updated at RXRDY_TXKL flag clear with the next bank.

This field is also updated at TXRDY_TRER flag set with the next bank.

This field is reset by EPT_x of UDPHS_EPTRST register. 

0

BANK0

Bank 0 (or single bank)

1

BANK1

Bank 1

2

BANK2

Bank 2

0

1BUSYBANK

1 busy bank

1

2BUSYBANKS 

2 busy banks

2

3BUSYBANKS

3 busy banks