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High-Speed USB Host Subsystem
Bits
Field Name
Description
Type
Reset
3
SESSEND_FALL
Generate an interrupt event notification when SessEnd
RW
0x0
changes from high to low.
Write 0x0: No effect on bit value
Write 0x1: Clear the bit to 0
2
SESSVALID_FALL
Generate an interrupt event notification when SessValid
RW
0x0
changes from high to low. SessValid is the same as
UTMI+ AValid.
Write 0x0: No effect on bit value
Write 0x1: Clear the bit to 0
1
VBUSVALID_FALL
Generate an interrupt event notification when VbusValid
RW
0x0
changes from high to low.
Write 0x0: No effect on bit value
Write 0x1: Clear the bit to 0
0
HOSTDISCONNECT_FALL
Generate an interrupt event notification when
RW
0x0
Hostdisconnect changes from high to low. Applicable only
in host mode (DpPulldown and DmPulldown both set to
1b).
Write 0x0: No effect on bit value
Write 0x1: Clear the bit to 0
Table 22-111. Register Call Summary for Register ULPI_USB_INT_EN_FALL_CLR_i
High-Speed USB Host Subsystem
•
High-Speed USB Host Subsystem Register Summary
Table 22-112. ULPI_USB_INT_STATUS_i
Address Offset
0x0000 0013 + (0x100 * i)
Index
i = 0 to 2
Physical Address
0x4806 2813 + (0x100 * i)
Instance
USBTLL
Description
Indicates the current value of the interrupt source signal.
Type
R
7
6
5
4
3
2
1
0
RESERVED
IDGND
SESSEND
SESSVALID
VBUSVALID
HOSTDISCONNECT
Bits
Field Name
Description
Type
Reset
7:5
RESERVED
Reserved
R
0x0
4
IDGND
Value of UTMI+ IdDig output. Undefined unless IdPullup
R
0x0
= 1
0x0: ID pin is grounded = OTG A = default Host
0x1: ID pin is floating = OTG B = default Peripheral
3
SESSEND
Current value of UTMI+ SessEnd output.
R
0x0
0x0: VBUS is above Session-End threshold
0x1: VBUS is below Session-End threshold
2
SESSVALID
Current value of UTMI+ SessValid output. SessValid is
R
0x0
the same as UTMI+ AValid.
0x0: VBUS is below Session-Valid threshold
0x1: VBUS is above Session-Valid threshold
1
VBUSVALID
Current value of UTMI+ VbusValid output.
R
0x0
0x0: VBUS is below Vbus-Valid threshold
0x1: VBUS is above Vbus-Valid threshold
3311
SWPU177N – December 2009 – Revised November 2010
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
Copyright © 2009–2010, Texas Instruments Incorporated