C541U_99 Datasheet, PDF (128/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

On-Chip Peripheral Components
C541U
6.4.8.6 USB Low Speed Interrupts
Each of the USB Low Speed specific interrupt share the vector address of 004B_H. The general
interrupt enable EUEI in IEN1 register has to be enabled, before using these interrupts. The
interrupts are cleared by reading USBDCR register. The following table lists the USB Low Speed
specific interrupts.
Table: USB Low Speed Interrupt Source and Vectors
Interrupt Request
SETUP packet interrupt
OUT packet interrupt
USB Suspend interrupt
USB Reset interrupt
DADD interrupt
Interrupt Enable Flags
always enabled
always enabled
SUSPIE
always enabled
DADDIE
Semiconductor Group
6-83
1999-04-01