STULPI01ATBR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STULPI01ATBR Datasheet PDF : 44 Pages
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ULPI registers
STULPI01A - STULPI01B
Table 21. USB interrupt enable falling register
Address: 10h-12h (Read), 10h (Write), 11h (Set), 12h (Clear)
(If set, the bits in this register cause an interrupt event notification to be generated when the
corresponding PHY signal changes from high to low. By default, all transitions are enabled. RxActive and
RxError must always be communicated immediately and so are not included in this register. Interrupt
circuitry can be powered down in any mode when both rising and falling edge enables are disabled. To
ensure interrupts are detectable when clock is powered down, the link should enable both rising and
falling edges.)
Field name
Bits Access Reset
Description
Host disconnect fall
VbusValid fall
SessValid fall
SessEnd fall
ID fall
0
rd/wr/s/c
1
rd/wr/s/c
2
rd/wr/s/c
3
rd/wr/s/c
4
rd/wr/s/c
Generates an interrupt event notification when the host
1b disconnect changes from high to low. Applicable only in
host mode.
1b
Generates an interrupt event notification when
VbusValid changes from high to low.
Generates an interrupt event notification when
1b SessValid changes from high to low. SessValid is the
same as UTMI+ AValid.
1b
Generates an interrupt event notification when SessEnd
changes from high to low.
Generates an interrupt event notification when ID
1b
changes from high to low. ID is valid 50ms after IdPullup
is set to 1b, otherwise ID is undefined and should be
ignored.
Reserved
7:5 rd/wr/s/c
0b Reserved
Table 22. USB interrupt status register
Address: 13h (Read-only)
(Indicates the current value of the interrupt source signal. Interrupt circuitry can be powered down in any
mode when both rising and falling edge enables are disabled. To ensure interrupts are detectable when
clock is powered down, the link should enable both rising and falling edges.)
Field name
Bits Access Reset
Description
Host disconnect
Current value of UTMI+ Host disconnect output.
0
rd
0b Applicable only in host mode. Automatically reset to 0b
when Low Power Mode is entered.
VbusValid
1
rd
0b Current value of UTMI+VbusValid output.
SessValid
2
rd
0b
Current value of UTMI+SessValid output. SessValid is the
same as UTMI+ AValid.
SessEnd
3
rd
0b Current value of UTMI+SessEnd output.
Current value of UTMI+ID output. ID is valid 50ms after
ID
4
rd
0b IdPullup is set to 1b, otherwise ID is undefined and should
be ignored.
Reserved
7:5
rd
0b Reserved
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