Microchip Technology TDGL019 Data Sheet

PIC32MX1XX/2XX

DS60001168F-page 138

REGISTER 10-16: U1SOF: USB SOF THRESHOLD REGISTER

Bit

Range

Bit

31/23/15/7

Bit

30/22/14/6

Bit

29/21/13/5

Bit

28/20/12/4

Bit

27/19/11/3

Bit

26/18/10/2

Bit

25/17/9/1

Bit

24/16/8/0

31:24

U-0

—

23:16

U-0

—

15:8

U-0

—

7:0

R/W-0

CNT<7:0>

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 31-8 Unimplemented: Read as ‘0’
bit 7-0

CNT<7:0>:

SOF Threshold Value bits

Typical values of the threshold are:
01001010

= 64-byte packet

00101010

= 32-byte packet

00011010

= 16-byte packet

00010010

= 8-byte packet

REGISTER 10-17: U1BDTP1: USB BUFFER DESCRIPTOR TABLE PAGE 1 REGISTER

Bit

Range

Bit

31/23/15/7

Bit

30/22/14/6

Bit

29/21/13/5

Bit

28/20/12/4

Bit

27/19/11/3

Bit

26/18/10/2

Bit

25/17/9/1

Bit

24/16/8/0

31:24

U-0

—

23:16

U-0

—

15:8

U-0

—

7:0

R/W-0

U-0

BDTPTRL<15:9>

—

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 31-8 Unimplemented: Read as ‘0’
bit 7-1

BDTPTRL<15:9>:

Buffer Descriptor Table Base Address bits

This 7-bit value provides address bits 15 through 9 of the Buffer Descriptor Table base address, which
defines the starting location of the Buffer Descriptor Table in system memory.
The 32-bit Buffer Descriptor Table base address is 512-byte aligned.

bit 0

Unimplemented:

Read as ‘0’