PIC16LF1454 Datasheet, PDF (332/418 Pages) Microchip Technology – 14/20-Pin Flash, 8-Bit USB Microcontrollers with XLP Technology

PIC16(L)F1454/5/9
REGISTER 26-7: UIR: USB INTERRUPT STATUS REGISTER
U-0
—
bit 7
R/W-0
SOFIF
R/W-0
STALLIF
R/W-0
IDLEIF⁽¹⁾
R/W-0
TRNIF⁽²⁾
R/W-0
ACTVIF⁽³⁾
R-0
UERRIF⁽⁴⁾
R/W-0
URSTIF
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Unimplemented: Read as ‘0’
bit 6
SOFIF: Start-of-Frame Token Interrupt bit
1 = A Start-of-Frame token received by the SIE
0 = No Start-of-Frame token received by the SIE
bit 5
STALLIF: A STALL Handshake Interrupt bit
1 = A STALL handshake was sent by the SIE
0 = A STALL handshake has not been sent
bit 4
IDLEIF: Idle Detect Interrupt bit⁽¹⁾
1 = Idle condition detected (constant Idle state of 3 ms or more)
0 = No Idle condition detected
bit 3
TRNIF: Transaction Complete Interrupt bit⁽²⁾
1 = Processing of pending transaction is complete; read USTAT register for endpoint information
0 = Processing of pending transaction is not complete or no transaction is pending
bit 2
ACTVIF: Bus Activity Detect Interrupt bit⁽³⁾
1 = Activity on the D+/D- lines was detected
0 = No activity detected on the D+/D- lines
bit 1
UERRIF: USB Error Condition Interrupt bit⁽⁴⁾
1 = An unmasked error condition has occurred
0 = No unmasked error condition has occurred
bit 0
URSTIF: USB Reset Interrupt bit
1 = Valid USB Reset occurred; UADDR register is cleared
0 = No USB Reset has occurred
Note 1:
2:
3:
4:
Once an Idle state is detected, the user may want to place the USB module in Suspend mode.
Clearing this bit will cause the USTAT FIFO to advance (valid only for IN, OUT and SETUP tokens).
This bit is typically unmasked only following the detection of a UIDLE interrupt event.
Only error conditions enabled through the UEIE register will set this bit. This bit is a status bit only and
cannot be set or cleared by the user.
DS41639A-page 332
Preliminary
 2012 Microchip Technology Inc.