Samsung S3C6400X User Manual page 856

S3C6400X RISC MICROPROCESSOR
SGNPInNAK
TstCtl
GOUTNakSts
GNPINNakSts
SftDiscon
RmtWkUpSig
NAK.
[7] WO Set Global Non-Periodic IN NAK
A write to this field sets the Global Non-Periodic IN
NAK. The application uses this bit to send a NAK
handshake on all non-periodic IN endpoints. The
core can also set this bit when a timeout condition is
detected on a non-periodic endpoint. The application
must set this bit only after making sure that the
Global IN NAK Effective bit in the Core Interrupt
Register is cleared.
[6:4] R_W Test Control
· 3'b000 : Test mode disabled
· 3'b001 : Test_J mode
· 3'b010 : Test_K mode
· 3'b011 : Test_SE0_NAK mode
· 3'b100 : Test_Packet mode
· 3'b101 : Test_Force_Enable
· Others : Reserved
[3] RO Global OUT NAK Status
· 1'b0 : A handshake is sent based on the FIFO
Status and the NAK and STALL bit settings.
· 1'b1 : No data is written to the RxFIFO, irrespective
of space availability. Sends a NAK handshake on all
packets, except on SETUP transactions. All
isochronous OUT packets are dropped.
[2] RO Global Non-Periodic IN NAK Status
· 1'b0 : A handshake is sent based on the data
availability in the transmit FIFO.
· 1'b1 : A NAK handshake is sent out on all non-
periodic IN endpoints, irrespective of the data
availability in the transmit FIFO.
[1] R_W Soft Disconnect
The application uses this bit to signal the OTG core
to do a soft disconnect. As long as this bit is set, the
host will not see that the device is connected, and
the device will not receive signals on the USB. The
core stays in the disconnected state until the
application clears this bit.
· 1'b0 : Normal operation. When this bit is cleared
after a soft disconnect, the core drives the opmode
signal on the UTMI+ to 2'b00, which generates a
device connect event to the USB host. When the
device is reconnected, the USB host restarts device
enumeration.
· 1'b1 : The core drives the opmode signal on the
UTMI+ to 2'b01, which generates a device
disconnect event to the USB host.
[0] R_W Remote Wakeup Signaling
When the application sets this bit, the core initiates
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
USB2.0 HS OTG
1'b0
3'b0
1'b0
1'b0
1'b0
1'b0
26-49