Samsung S3C2451X User Manual page 382

USB2.0 DEVICE
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
EDR 0x4980_0014
EDR Bit
[31:9]
EP8DS [8]
EP7DS [7]
EP6DS [6]
EP5DS [5]
EP4DS [4]
EP3DS [3]
EP2DS [2]
EP1DS [1]
[0]
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
17-10
Specifications and information herein are subject to change without notice.
R/W
R/W Endpoint Direction Register
R/W
Reserved
R/W Endpoint 8 Direction Select
R/W Endpoint 7 Direction Select
R/W Endpoint 6 Direction Select
R/W Endpoint 5 Direction Select
R/W Endpoint 4 Direction Select
R/W Endpoint 3 Direction Select
R/W Endpoint 2 Direction Select
R/W Endpoint 1 Direction Select
0: Rx Endpoint
1: Tx Endpoint
Reserved
S3C2451X RISC MICROPROCESSOR
Description
Description
Reset Value
0x0
Initial State
0
0
0
0
0
0
0
0