Microchip Technology MA330025-1 Data Sheet
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
DS70616G-page 400
2009-2012 Microchip Technology Inc.
REGISTER 22-15: UxIR: USB INTERRUPT STATUS REGISTER (HOST MODE ONLY)
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
R/K-0, HS
R/K-0, HS
R/K-0, HS
R/K-0, HS
R/K-0, HS
R/K-0, HS
R-0
R/K-0, HS
STALLIF
ATTACHIF
RESUMEIF
IDLEIF
TRNIF
SOFIF
UERRIF
DETACHIF
bit 7
bit 0
Legend:
U = Unimplemented bit, read as ‘0’
R = Readable bit
K = Write ‘1’ to clear bit
HS = Hardware Settable bit
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-8
Unimplemented: Read as ‘0’
bit 7
STALLIF: STALL Handshake Interrupt bit
1 = A STALL handshake was sent by the peripheral device during the handshake phase of the
1 = A STALL handshake was sent by the peripheral device during the handshake phase of the
transaction in Device mode
0 = A STALL handshake has not been sent
bit 6
ATTACHIF: Peripheral Attach Interrupt bit
1 = A peripheral attachment has been detected by the module; set if the bus state is not SE0 and there
1 = A peripheral attachment has been detected by the module; set if the bus state is not SE0 and there
has been no bus activity for 2.5
s
0 = No peripheral attachment is detected
bit 5
RESUMEIF: Resume Interrupt bit
1 = A K-State is observed on the D+ or D- pin for 2.5 s (differential ‘1’ for low speed, differential ‘0’ for
1 = A K-State is observed on the D+ or D- pin for 2.5 s (differential ‘1’ for low speed, differential ‘0’ for
full speed)
0 = No K-State is observed
bit 4
IDLEIF: Idle Detect Interrupt bit
1 = Idle condition is detected (constant Idle state of 3 ms or more)
0 = No Idle condition is detected
1 = Idle condition is detected (constant Idle state of 3 ms or more)
0 = No Idle condition is detected
bit 3
TRNIF: Token Processing Complete Interrupt bit
1 = Processing of current token is complete; read USTAT register for endpoint BDT information
0 = Processing of current token is not complete; clear USTAT register or load next token from STAT
1 = Processing of current token is complete; read USTAT register for endpoint BDT information
0 = Processing of current token is not complete; clear USTAT register or load next token from STAT
bit 2
SOFIF: Start-of-Frame Token Interrupt bit
1 = Start-of-Frame threshold is reached by the host
0 = No Start-of-Frame token threshold is reached
1 = Start-of-Frame threshold is reached by the host
0 = No Start-of-Frame token threshold is reached
bit 1
UERRIF: USB Error Condition Interrupt bit
1 = An unmasked error condition has occurred; only error states enabled in the UxEIE register can set
1 = An unmasked error condition has occurred; only error states enabled in the UxEIE register can set
this bit
0 = No unmasked error condition has occurred
bit 0
DETACHIF: Detach Interrupt bit
1 = A peripheral detachment has been detected by the module
0 = No peripheral detachment has been detected
1 = A peripheral detachment has been detected by the module
0 = No peripheral detachment has been detected