MC68HC08JB1 Datasheet, PDF (134/216 Pages) Motorola, Inc – Microcontrollers

9.9 USB Interrupts
The USB module is capable of generating interrupts and causing the
CPU to execute the USB interrupt service routine. There are three types
of USB interrupts:
• End-of-transaction interrupts signify either a completed
transaction receive or transmit transaction.
• Resume interrupts signify that the USB bus is reactivated after
having been suspended.
• End-of-packet interrupts signify that a low-speed end-of-packet
signal was detected.
All USB interrupts share the same interrupt vector. Firmware is
responsible for determining which interrupt is active.
9.9.1 USB End-of-Transaction Interrupt
There are four possible end-of-transaction interrupts:
• Endpoint 0 receive
• Endpoint 0, 1 or 2 transmit
End-of-transaction interrupts occur as detailed in the following sections.
Technical Data
134
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor