Endpoint Interrupt Register (Eir) - Samsung S3C2416 User Manual

USB2.0 DEVICE

8.2 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
EIR 0x4980_0004
EIR Bit
[31:9]
EP8I [8]
EP7I [7]
EP6I [6]
EP5I [5]
EP4I [4]
EP3I [3]
EP2I [2]
EP1I [1]
EP0I [0]
16-8
Address R/W
R/C Endpoint Interrupt Register
R/W
− Reserved
R/C Endpoint 8 Interrupt Flag
R/C Endpoint 7 Interrupt Flag
R/C Endpoint 6 Interrupt Flag
R/C Endpoint 5 Interrupt Flag
R/C Endpoint 4 Interrupt Flag
R/C Endpoint 3 Interrupt Flag
R/C Endpoint 2 Interrupt Flag
R/C Endpoint 1 Interrupt Flag
R/C Endpoint 0 Interrupt Flag
S3C2416X RISC MICROPROCESSOR
Description
Description
Reset Value
0x00
Initial State
0
0
0
0
0
0
0
0
0
0