EZ-USB Datasheet, PDF (170/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

IN07IRQ
b7
IN7IR
b6
IN6IR
Endpoints 0-7 IN Interrupt Requests
b5
IN5IR
b4
IN4IR
b3
IN3IR
b2
IN2IR
b1
IN1IR
7FA9
b0
IN0IR
OUT07IRQ
Endpoints 0-7 OUT Interrupt Requests
7FAA
b7
OUT7IR
b6
OUT6IR
b5
OUT5IR
b4
OUT4IR
b3
OUT3IR
b2
OUT2IR
b1
OUT1IR
b0
OUT0IR
USBIRQ
b7
b6
-
-
USB Interrupt Request
7FAB
b5
b4
b3
b2
b1
b0
-
USESIR SUSPIR SUTOKIR SOFIR SUDAVIR
IN07IEN
b7
IN7IEN
b6
IN6IEN
Endpoints 0-7 IN Interrupt Enables
b5
IN5IEN
b4
IN4IEN
b3
IN3IEN
b2
IN2IEN
b1
IN1IEN
7FAC
b0
IN0IEN
OUT07IEN
Endpoints 0-7 OUT Interrupt Enables
7FAD
b7
OUT7IEN
b6
OUT6IEN
b5
OUT5IEN
b4
OUT4IEN
b3
OUT3IEN
b2
OUT2IEN
b1
OUT1IEN
b0
OUT0IEN
USBIEN
b7
b6
-
-
USB Interrupt Enables
7FAE
b5
b4
b3
b2
b1
b0
-
URESIE SUSPIE SUTOKIE SOFIE SUDAVIE
Figure 9-4. EZ-USB Interrupt Registers
Figure 9-4 shows the registers associated with the USB interrupts. Each interrupt source
has an enable (IEN) and a request (IRQ) bit. The 8051 sets the IEN bit to enable the inter-
rupt. The USB core sets an IRQ bit high to request an interrupt, and the 8051 clears an
IRQ bit by writing a “1” to it.
EZ-USB TRM v1.9
Chapter 9. EZ-USB Interrupts
Page 9-7