User's Manual

S3C2450X RISC MICROPROCESSOR USB2.0 DEVICE
17-11
8.5 ENDPOINT DIRECTION REGISTER (EDR)
USB 2.0 Core supports IN/OUT direction control for each endpoint. This direction can’t be changed dynamically.
Only by new enumeration, the direction can be altered. Since the endpoint 0 is bi-directional, there is no direction
bit assigned to it.
Register Address R/W Description Reset Value
EDR 0x4980_0014 R/W Endpoint direction register 0x0
EDR Bit R/W Description Initial State
[31:9]
−
Reserved
EP8DS [8] R/W Endpoint 8 Direction Select 0
EP7DS [7] R/W Endpoint 7 Direction Select 0
EP6DS [6] R/W Endpoint 6 Direction Select 0
EP5DS [5] R/W Endpoint 5 Direction Select 0
EP4DS [4] R/W Endpoint 4 Direction Select 0
EP3DS [3] R/W Endpoint 3 Direction Select 0
EP2DS [2] R/W Endpoint 2 Direction Select 0
EP1DS [1] R/W Endpoint 1 Direction Select
0 = Rx Endpoint
1 = Tx Endpoint
0
[0]
−
Reserved