Preliminary
S3C2451X RISC MICROPROCESSOR
USB2.0 DEVICE
17-7
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
ENDPOINT INTERRUPT REGISTER (EIR)
The endpoint interrupt register lets the MCU knows what endpoint generates the interrupt. The source of an
interrupt could be various, but, when an interrupt is detected, the endpoint status register should be checked to
identify if it’s related to specific endpoint. Clearing the bits can be accomplished by writing “1” to the bit position
where the interrupt is detected.
Register Address
R/W
Description
Reset
Value
EIR 0x4980_0004
R/C
Endpoint
Interrupt Register
0x00
EIR Bit
R/W
Description
Initial
State
[31:9]
Reserved
0
EP8I
[8]
R/C
Endpoint 8 Interrupt Flag
0
EP7I
[7]
R/C
Endpoint 7 Interrupt Flag
0
EP6I
[6]
R/C
Endpoint 6 Interrupt Flag
0
EP5I
[5]
R/C
Endpoint 5 Interrupt Flag
0
EP4I
[4]
R/C
Endpoint 4 Interrupt Flag
0
EP3I
[3]
R/C
Endpoint 3 Interrupt Flag
0
EP2I
[2]
R/C
Endpoint 2 Interrupt Flag
0
EP1I
[1]
R/C
Endpoint 1 Interrupt Flag
0
EP0I
[0]
R/C
Endpoint 0 Interrupt Flag
0