Datasheet

Block description STULPI01A, STULPI01B
20/44 Doc ID 14817 Rev 4
Figure 6. VB_REF_FAULT pin functionality
6.9 Voltage regulator
The dual output ultra low dropout voltage regulator provides the power supply for analog and
digital internal circuits. An external capacitor on both the 3V3V and 1V2V pins is needed for
proper operation.
6.10 ID detector
This block provides the sensing of the status of the ID line. It is capable of detecting whether
the pin is floating or tied to the ground.
6.11 USB 2.0 PHY
The USB 2.0 PHY block provides a complete physical layer transceiver for low-speed, full-
speed, and high-speed USB operating modes. The analog part of this block deals with
impedance adaptation, controlled voltage swing, and Common mode voltage generation
+
-
REF
VBREF_FAULT
Internal VBUS Valid
VBUSVLD
[UseExternalVbusIndicator, IndicatorPassthru]
RX CMD VBUS Valid
2
0
1
[0,X]
[1,0]
[1,1]
BUS
VB
REF
V
BUS
(5 V TOLERANT)
VBUS
FAULT
+
-
VBOC
EN
/EN
+
-
Valid
IndicatorComplement
OverCurrent_PD or neg (UseExternalVbusIndicator)
0
1
[0,X]
[1,1]
V
V
VBUS
+
-
VBOC
R IN_VBREF
+
-
REF
VBREF_FAULT
Internal VBUS Valid
VBUSVLD
[UseExternalVbusIndicator, IndicatorPassthru]
RX CMD VBUS Valid
2
0
1
[0,X]
[1,0]
[1,1]
BUS
VB
REF
V
BUS
Schmitt
(5 V TOLERANT)
VBUS
FAULT
+
-
VBOC
EN
/EN
+
-
Valid
IndicatorComplement
OverCurrent_PD or neg (UseExternalVbusIndicator)
0
1
[0,X]
[1,1]
V
V
VBUS
+
-
VBOC
R IN_VBREF
AM04948v2
Table 9. VB_REF_FAULT configuration bit settings
RX CMD VBUS valid
Use External
Vbus Indicator
Overcurrent_PD Indicator Pass-Thru
Indicator
complement
VBUSVLD 0 1 X X
VBOC 1 0 1 X
VBOC and VBUSVLD 1 0 0 X
neg (FAULT) 1 1 1 0
FAULT 1 1 1 1
VBUSVLD and FAULT 1 1 0 1
VBUS_VLD and neg (FAULT) 1 1 0 0