RM0082
HS_USB 2.0 device
Doc ID 018672 Rev 1
491/844
[16]
HALT
STATUS
1'h0
Reply to USB host Clear_Feature request for endpoint 0.
This bit indicates whether the USB device must respond
with either a STALL (bit set to 1‘b1) or an ACK (bit set to
1‘b0) handshake when a Clear_Feature
(ENDPOINT_HALT) request for Endpoint 0 has been
issued by the USB host.
[15:13]
HS_TIMEO
UT CALIB
3‘h0
Timeout counter in HS operation.
This 3 bit field indicates the integer number of PHY clocks
to the USB device’s timeout counter in high-speed (HS)
operation.
The application uses this value to increase the timeout
value (736 to 848 bit times in HS operation), which depends
on the PHY’s delay in generating a line state condition. The
default timeout value is 736 bit times.
[12:10]
FS_TIMEO
UT CALIB
3‘h0
Timeout counter in FS operation.
This 3 bit field indicates the integer number of phy clocks to
the USB device’s timeout counter in full-speed (FS)
operation.
The application uses this value to increase the timeout
value (16 to 18 bit times in FS operation), which depends
on the PHY’s delay in generating a line state condition. The
default timeout value is 16 bit times.
[09]
PHY_ERRO
R DETECT
1'h0
PHY error detection.
Setting this bit, the USB device detects either the
phy_rxvalid or the phy_rxactive input signal to be
continuously asserted for 2 ms, indicating a PHY error.
[08]
STATUS_1
1'h0
See description.
[07]
STATUS
1'h0
STATUS_1, STATUS
These 2 bits together provide an option for the USB device
to respond to the USB host with a STALL or an ACK
handshake if the USB host has issued a non-zero-length
data packet during the status-out stage of a control transfer.
Refer to USB device technical documentation for more
information.
[06]
DIR
1'h0
UTMI data bus interface direction.
This bit states the direction of the UTMI data bus interface,
according to encoding:
1‘b0 = Unidirectional.
1‘b1 = Bidirectional.
[05]
PI
1'h0
UTMI PHY interface.
This bit indicates the interface size which the UTMI PHY
must support, according to encoding:
1‘b0 = 16 bit.
1‘b1 = 8 bit.
[04]
SS
1'h0
If set, the USB device supports Sync frame.
[03]
SP
1'h0
If set, the USB device is self-powered.
Table 400.
Device configuration register bit assignments (continued)
Bit
Name
Reset value Description