AT90SCR100 datasheet(230/433 Pages) ATMEL

230 / 433 page

230

TPR0327AY–SMS–30Jan09

AT90SCR100

• Bits 7..0 - PDAT7..0 : Pipe Data Bits

Set by the software to read/write a byte from/to the Pipe FIFO selected by PNUM.

17.7.20

UPBCX - USB Pipe Byte Count Register for Pipe X

Set UPNUM register to point to the relevant Pipe before using the UPBCXH and UPBCXL

registers.

• Bits 15..11 - Res : Reserved

The value read from these bits is always 0. Do not set these bits.

• Bits 10..0 - PBYCT10..0 : Byte count Bits

Set by hardware.

PBYCT10:0 is:

• (for OUT Pipe) increased after each writing into the Pipe and decremented after each byte

sent,

• (for IN Pipe) increased after each byte received by the host, and decremented after each

byte read by the software.

17.7.21

UPINT - USB Pipe Interrupt Register

• Bits 7..4 - Res : Reserved

The value read from these bits is always 0. Do not set these bits.

• Bits 3..0 - PINT3..0 : Pipe Interrupts Bits

Set by hardware when an interrupt is triggered by the UPINTX register and if the corresponding

endpoint interrupt enable bit is set.

Cleared by hardware when the interrupt source is served.

Bit

151413

$009C

-----

PBYTCT [10..8]

UPBCXH

$009B

PBYTCT [7..0]

UPBCXL

Bit

76543

Read/write

RRRRR

R/W

Initial value

00000

0x00

00000

0x00

Bit

$009A

PINT3

PINT2

PINT1

PINT0

UPINT

Read/write

Initial value

0x00

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