w681308 Winbond Electronics Corp America, w681308 Datasheet - Page 31

• Manufacturer Part Number: w681308
• Description: Usb Audio Controller
• Manufacturer: Winbond Electronics Corp America

10.
10.1
The W681308 generates internal events, these interrupt events are triggered by the interrupt control logic. The MCU
supports two priority levels of interrupts with 6 interrupt sources.
10.2
The External Interrupts INT0 and INT1 can be either edge triggered or level triggered,
The Interface and Support logic generate the following interrupts:
Three registers control the generation of interrupts in the W681308, the interrupt source register, the interrupt enable register
and the interrupt priority register. Each interrupt has a corresponding bit in these three registers.
The interrupt source register is set when an interrupt event occurs and is cleared by MCU.
When the MCU writes to interrupt source, any bit that is set to 1 cause the corresponding bit of interrupt source to be cleared,
bits set to 0 are not affected (write “one” to clear).
An Interrupt is generated when (interrupt source) & (interrupt enable) =1 for any of the interrupt sources. For each bit; if
interrupt priority = 0, the interrupt is issued to INT0, if interrupt priority = 1, the interrupt is issued to INT1.
NFS interrupt
Keypad-Wakeup Interrupt
GPIO interrupt
SPI interrupt
W2S interrupt
USB interrupt
Interrupt Control
Overview
Functionality
Interrupt
Interrupt
Interrupt
Priority
Enable
Source
Figure 3 Interrupt Structure
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&
&
INT0
INT1
W681308
Rev1.2