PIC32MX1XX_12 Datasheet, PDF (128/328 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
REGISTER 10-8: U1EIR: USB ERROR INTERRUPT STATUS REGISTER
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Range 31/23/15/7 30/22/14/6 29/21/13/5 28/20/12/4 27/19/11/3 26/18/10/2
U-0
U-0
U-0
U-0
U-0
U-0
31:24
—
—
—
—
—
—
U-0
U-0
U-0
U-0
U-0
U-0
23:16
—
—
—
—
—
—
U-0
U-0
U-0
U-0
U-0
U-0
15:8
—
—
—
—
—
—
R/WC-0, HS R/WC-0, HS R/WC-0, HS R/WC-0, HS R/WC-0, HS R/WC-0, HS
7:0
BTSEF
BMXEF DMAEF⁽¹⁾ BTOEF⁽²⁾ DFN8EF CRC16EF
Bit
25/17/9/1
U-0
—
U-0
—
U-0
—
R/WC-0, HS
CRC5EF⁽⁴⁾
EOFEF^(3,5)
Bit
24/16/8/0
U-0
—
U-0
—
U-0
—
R/WC-0, HS
PIDEF
Legend:
R = Readable bit
-n = Value at POR
WC = Write ‘1’ to clear
W = Writable bit
‘1’ = Bit is set
HS = Hardware Settable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 31-8 Unimplemented: Read as ‘0’
bit 7 BTSEF: Bit Stuff Error Flag bit
1 = Packet rejected due to bit stuff error
0 = Packet accepted
bit 6 BMXEF: Bus Matrix Error Flag bit
1 = The base address, of the BDT, or the address of an individual buffer pointed to by a BDT entry, is invalid.
0 = No address error
bit 5 DMAEF: DMA Error Flag bit⁽¹⁾
1 = USB DMA error condition detected
0 = No DMA error
bit 4 BTOEF: Bus Turnaround Time-Out Error Flag bit⁽²⁾
1 = Bus turnaround time-out has occurred
0 = No bus turnaround time-out
bit 3 DFN8EF: Data Field Size Error Flag bit
1 = Data field received is not an integral number of bytes
0 = Data field received is an integral number of bytes
bit 2 CRC16EF: CRC16 Failure Flag bit
1 = Data packet rejected due to CRC16 error
0 = Data packet accepted
Note 1:
2:
3:
4:
5:
This type of error occurs when the module’s request for the DMA bus is not granted in time to service the
module’s demand for memory, resulting in an overflow or underflow condition, and/or the allocated buffer
size is not sufficient to store the received data packet causing it to be truncated.
This type of error occurs when more than 16-bit-times of Idle from the previous End-of-Packet (EOP)
has elapsed.
This type of error occurs when the module is transmitting or receiving data and the SOF counter has
reached zero.
Device mode.
Host mode.
DS61168E-page 128
Preliminary
 2011-2012 Microchip Technology Inc.