Filter
Top Products
Intel
®
IXP42X product line and IXC1100 control plane processors—Universal Serial Bus (USB)
v1.1 Device Controller
Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
DM September 2006
526 Order Number: 252480-006US
18.5.26 UDC Byte Count Register 7 (UBCR7)
The Byte-Count Register maintains the remaining byte count in the active buffer of out
endpoint 7.
18.5.26.1 Endpoint 7 Byte Count (BC[7:0])
The byte count is updated after each byte is read. When software receives an interrupt
that indicates the endpoint has data, it can read the byte count register to determine
the number of bytes that remain to be read.
The number of bytes that remain in the input buffer is equal to the byte count +1.
18.5.27 UDC Byte Count Register 9 (UBCR9)
The Byte-Count Register maintains the remaining byte count in the active buffer of out
endpoint 9.
18.5.27.1 Endpoint 9 Byte Count (BC[7:0])
The byte count is updated after each byte is read. When software receives an interrupt
that indicates the endpoint has data, it can read the byte count register to determine
the number of bytes that remain to be read.
The number of bytes that remain in the input buffer is equal to the byte count +1.
Register UBCR4
Bits Name Description
31:8 (Reserved)
7:0 BC
Byte Count (read-only).
Number of bytes in the FIFO is Byte Count plus 1 (BC+1).
Register Name: UBCR7
Hex Offset Address: 0 x C800B070 Reset Hex Value: 0x00000000
Register
Description:
Universal Serial Bus Device Endpoint 7 Byte Count
Access: Read-Only
Bits
31 87 0
(Reserved) BC[7:0]
X 00000000
Resets (Above)
Register
UBCR7
Bits Name Description
31:0 (Reserved)
7:0 BC
Byte Count (read-only).
Number of bytes in the FIFO is Byte Count plus 1 (BC+1).