Universal Serial Bus OTG Controller
UG0331 User Guide Revision 15.0 338
10.3.9.1 ULPI_VBUS_CTRL_REG Bit Definitions
10.3.9.2 ULPI_CARKIT_CTRL_REG Bit Definitions
FS_EOF1_REG
(0x4004307D)
0x4004307D 8 RW 0x77 Sets the minimum time gap that is to be allowed
between the start of the last transaction and the
EOF for full speed transactions.
LS_EOF1_REG
(0x4004307E)
0x4004307E 8 RW 0x72 Sets the minimum time gap that is to be allowed
between the start of the last transaction and the
EOF for low speed transactions.
SOFT_RESET_REG
(0x4004307F)
0x4004307F 8 RW 0 Asserts the output reset signals, NRSTO and
NRSTOX, low. This register is self clearing and
is reset by the input NRST.
Table 253 • ULPI_VBUS_CTRL_REG (0x40043070)
Bit
Number Name
Reset
Value Function
[7:2] Reserved N/A
1 UseExtVbusInd 0 When 1, selects the use of an external VBus indicator (overcurrent indicator) in
the PHY’s VbusState determination.
0 UseExtVbus 0 When 1, selects the use of an external charge pump.
Table 254 • ULPI_CARKIT_CTRL_REG (0x40043071)
Bit
Number Name
Reset
Value Function
[7:6] Reserved N/A Reserved/ N/A
5 CarKitActiveEnd 0 Set by link when CarKitActive (bit 1 of this register) is cleared. This bit must be
cleared by software. Signifies that the USB controller’s (synchronous) USB
mode has been entered.
4 RxCmdEvent 0 Set by link when a RxCmd has been latched. This bit must be cleared by
software.
3 CancelCarKit 0 Set by software to abort CarKit mode and wake up the PHY. This bit auto-
clears when the PHY enters Synchronous mode.
2 AltIntEvent 0 Set by link when an alt_int (ULPI_RAW_DATA_REG.bit7) event occurs. This bit
must be cleared by software.
1 CarKitActive 0 Set by link when the (asynchronous) CarKit mode is entered after DIR goes
high. It is cleared on the falling edge of DIR.
0 DisableUTMI 0 Set and cleared by software to decouple the reconstituted UTMI signals from
the USB controller prior to entering CarKit mode.
Can not be cleared while ULPICarKitControl CarKitActive bit (bit 1 of this
register) is set.
Table 252 • ULPI and Configuration Registers (continued)
Register Name Address Width
R/W
Type
Reset
Value Description
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