PIC16F1459T-E/SL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F1459T-E/SL

14/20-Pin Flash, 8-Bit USB Microcontrollers with XLP Technology

Microchip 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.

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