Rainbow Electronics AT91CAP9S250A User Manual
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888
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
:Endpoint Type
• BK_NUMBER: Number of Banks
Read and write:
Set this field according to the endpoint’s number of banks (see
Section 44.4.5 ”Endpoint Configuration”
Number of Banks
• NB_TRANS: Number Of Transaction per Microframe
Read and Write:
The Number of transactions per microframe is set by software.
Note:
Meaningful for high bandwidth isochronous endpoint only.
• EPT_MAPD: Endpoint Mapped
Read-only:
0 = the user should reprogram the register with correct values.
1 = set by hardware when the endpoint size (EPT_SIZE) and the number of banks (BK_NUMBER) are correct regarding:
– the fifo max capacity (FIFO_MAX_SIZE in UDPHS_IPFEATURES register)
– the number of endpoints/banks already allocated
– the number of allowed banks for this endpoint
00
Control endpoint
01
Isochronous endpoint
10
Bulk endpoint
11
Interrupt endpoint
00
Zero bank, the endpoint is not mapped in memory
01
One bank (bank 0)
10
Double bank (Ping-Pong: bank 0/bank 1)
11
Triple bank (bank 0/bank 1/bank 2)