Datasheet

406
42023E–SAM–07/2013
ATSAM4L8/L4/L2
17.7.3.2 Host Global Interrupt Register
Register Name: UHINT
Access Type: Read-Only
Offset: 0x0404
Reset Value: 0x00000000
Note: 1. PnINT bits are within the range from P0INT to P7INT.
• PnINT: Pipe n Interrupt
This bit is cleared when the interrupt source is served.
This bit is set when an interrupt is triggered by the endpoint n (UPSTAn). This triggers a USB interrupt if the corresponding pipe
interrupt enable bit is one (UHINTE register).
• HWUPI: Host Wakeup Interrupt
This bit is cleared when the HWUPIC bit is written to one.
This bit is set when:
- the host controller is in the suspend mode (SOFE is zero) and an upstream resume from the peripheral is detected.
- the host controller is in the suspend mode (SOFE is zero) and a peripheral disconnection is detected.
- the host controller is in the operationnal state (VBUSRQ is one) and a device connection is detected.
This interrupt is generated even if the clock is frozen by the FRZCLK bit.
• HSOFI: Host Start of Frame Interrupt
This bit is cleared when the HSOFIC bit is written to one.
This bit is set when a SOF is issued by the Host controller. This triggers a USB interrupt when HSOFE is one. When using the
host controller in low speed mode, this bit is also set when a keep-alive is sent.
• RXRSMI: Upstream Resume Received Interrupt
This bit is set when an Upstream Resume has been received from the Device.
This bit is cleared when the RXRSMIC is written to one.
• RSMEDI: Downstream Resume Sent Interrupt
This bit is cleared when the RSMEDIC bit is written to one.
This bit set when a Downstream Resume has been sent to the Device.
• RSTI: USB Reset Sent Interrupt
This bit is cleared when the RSTIC bit is written to one.
This bit is set when a USB Reset has been sent to the device.
• DDISCI: Device Disconnection Interrupt
This bit is cleared when the DDISCIC bit is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
-------P8INT
(1)
15 14 13 12 11 10 9 8
P7INT
(1)
P6INT
(1)
P5INT
(1)
P4INT
(1)
P3INT
(1)
P2INT
(1)
P1INT
(1)
P0INT
76543210
- HWUPI HSOFI RXRSMI RSMEDI RSTI DDISCI DCONNI