RM0082
HS_USB 2.0 device
Doc ID 018672 Rev 1
501/844
23.8.13
Endpoint buffer size and received packet frame number register
This is a dual-function endpoint-specific RW register which gives either the buffer size or the
TxFIFO associated to an in endpoint, or the frame number in which a packet is received an
out endpoint (useful to handle ISO traffic).
[05:04]
OUT
2‘h0
Out packet reception.
This 2 bit field states that if an out packet has been received
by the endpoint. The type of the incoming data is given by
encoding:
– 2‘b00 = None.
– 2‘b01 = Data.
– 2‘b10 = SETUP data (8 bytes).
– 2‘b11 = Reserved.
In order to clear these bits, the application must write the
same values.
[03:00]
Reserved
-
Read: undefined.
Table 408.
Endpoint status register bit assignments (continued)
Bit
Name
Reset value Description
Table 409.
Endpoint buffer size/received packet frame number register bit
assignments
Bit
Name
Reset value Description
[31:18]
Reserved
-
Read: undefined. Write: should be zero.