Interrupt Services
MOTOROLA
USB Device Port
28-45
28.8.1.5 WAKEUP—Resume (Wake-Up) Signaling Detected
This interrupt asserts when resume signaling is detected on the USB. The device uses this interrupt to wake
up from suspend mode and resume normal operations. This interrupt is independent of the clock to the
USB module.
28.8.1.6 SUSP—USB Suspended
This interrupt asserts when the USB goes into suspend mode. Suspend mode occurs when the device fails
to receive any traffic from the USB for a period of 6 ms. When suspend mode is detected, the device puts
itself into a low power standby mode.
28.8.1.7 FRAME_MATCH—Match Detected in USB_FRAME Register
This interrupt asserts when the frame number programmed into the MATCH field of the USB_FRAME
register is the same as the FRAME field of the USB_FRAME register. Isochronous pipes can use this
interrupt for synchronization between the data source and sink.
28.8.1.8 CFG_CHG—Host Changed USB Device Configuration
This interrupt means that the USB host selected a different configuration or alternate interface. Software
reads the USB_STAT register to determine the current configuration and interfaces and reconfigures itself
accordingly.
28.8.2 Endpoint Interrupts
The endpoint interrupts indicate requests for service by specific USB endpoints. All bits are maskable.
Each endpoint’s interrupt output is connected to a separate hardware interrupt line. When an event occurs
that causes an interrupt condition to occur, and the corresponding bit in the interrupt mask register is zero,
an interrupt signal asserts on the module’s interface. Writing 1 to the associated bit in the interrupt register
clears the interrupt.
28.8.2.1 FIFO_FULL
This interrupt asserts when the FIFO is full.
28.8.2.2 FIFO_EMPTY
This interrupt asserts when the FIFO is empty.
28.8.2.3 FIFO_ERROR
This interrupt means some abnormal condition occurred in the FIFO. The cause of the error can be verified
by reading the USB_EPn_FSTAT register associated with the FIFO that had the error.
28.8.2.4 FIFO_HIGH
Each FIFO has an alarm register. The FIFO_HIGH interrupt asserts when the number of free bytes in the
FIFO is below the level specified by the alarm register.
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...