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UPD1002-AI/MQ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P46
UPD1002
DS00001760B-page 16 2014 Microchip Technology Inc.
Source
Voltage
Select 0
VSEL0_N OD8 This active low signal is one in a series of output pins
(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the
correct source voltage from the DC-to-DC solution. Each
VSELx_N pin is dedicated to one voltage, assigned in
order of increasing supported voltage.
For example, if 5, 12 and 20 V capabilities are supported,
the VSELx_N selections will be as follows:
VSEL0_N = 5 V
VSEL1_N = 12 V
VSEL2_N = 20 V
In another example, if only 5 and 20 V care supported,
the VSELx_N selections will be as follows:
VSEL0_N = 5 V
VSEL1_N = 20 V
VSEL2_N = RESERVED
The VSELx_N pins are also used to set the overvoltage
protection (OVP) voltage on the VMON pin. The OVP
fault will trigger when the measured voltage on VMON is
10% above the selected voltage setting.
For a mapping of the VSELx_N voltage assignments for
each CFG_SEL1/CFG_SEL0 configuration profile, refer
to Section 3.3, "Configuration Selection (CFG_SEL0/
CFG_SEL1)," on page 24.
Note: This function is only available in specific
device configurations.
Source
Voltage
Select 1
VSEL1_N OD8 This active low signal is one in a series of output pins
(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the
correct source voltage from the DC-to-DC solution. Each
VSELx_N pin is dedicated to one voltage, assigned in
order of increasing supported voltage.
Refer to the VSEL0_N definition for additional informa-
tion.
Note: This function is only available in specific
device configurations.
Source
Voltage
Select 2
VSEL2_N OD8 This active low signal is one in a series of output pins
(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the
correct source voltage from the DC-to-DC solution. Each
VSELx_N pin is dedicated to one voltage, assigned in
order of increasing supported voltage.
Refer to the VSEL0_N definition for additional informa-
tion.
Note: This function is only available in specific
device configurations.
TABLE 2-2: PIN DESCRIPTIONS (CONTINUED)
Name Symbol
Buffer
Type
Description
2014 Microchip Technology Inc. DS00001760B-page 17
UPD1002
VBUS
Discharge
VBUS_DISCHARGE O8 This active high output is used to drive a power NFET to
discharge VBUS during high-to-low voltage transitions in
order to achieve vSafe0V. When asserted, the external
MOSFET should conduct to GND through a current limit-
ing resistor. This signal de-asserts when the VMON sig-
nal voltage reaches a preset value (a percentage of the
destination voltage).
VBUS
Out
VBUS_OUT O8 This active high output is used on an Upstream Facing
Port (UFP) to tell the hub to stay connected. This signal
will remain asserted at all times that a valid VBUS level is
present (VBUS minimum of 4.5 V to PD VBUS maximum
20 V+10%) on the UFP, as well as during any voltage
transitions or role swaps where the voltage may drop
below 4.5V.
Note: Per the OTG specification, data connectivity
roles can be swapped and a micro-AB con-
nector with a micro-A plug inserted can oper-
ate as an “upstream” port (as a device).
Therefore, VBUS_OUT assertion behavior as
per above is not only valid with a micro-B
cable, but also a micro-A cable so that the
USB data link is not lost during PD swaps.
Note: This function is only available in specific
device configurations.
USB ID
Indicator
USB_ID_IND O8 This signal is used in micro-AB pinouts to indicate to the
OTG host whether a micro-A plug (Legacy, Low Power or
PD) is present. If a micro-A plug is present, this pin is low.
Otherwise it is high.
Emulation
Enable
CHG_EMU_EN O8 This active high output signal can be used to drive the
Emulation Enable pin of a Microchip UCS1001 or similar
device that supports BC 1.2. The device will assert this
signal whenever operating at VSafe5V without a PD con-
tract. Whenever a PD contract is established (even at
5 V), this signal is de-asserted.
Note: This function is only available in specific
device configurations.
TABLE 2-2: PIN DESCRIPTIONS (CONTINUED)
Name Symbol
Buffer
Type
Description
UPD1002
DS00001760B-page 18 2014 Microchip Technology Inc.
Insertion
Detect
INSERTION_DETECT IS
(PU)
This active low input signal should be connected to the
Insertion Detect pin on the USB Standard-A (STD-A)
receptacle. This signal is pulled high via an internal pull-
up resistor by default. Assertion (low value) qualifies a
STD-A plug insertion event and triggers transition out of
the “Startup” state of the Source Policy engine.
The device firmware implements cold socket detection
using the INSERTION_DETECT signal. Even when
operating as a provider, if the signal is high, the device
will not output voltage on VBUS. VSafe5V will only be
output upon assertion of this signal (low).
Note: Cold socket (insertion detect) is an optional
feature in the USB PD specification. If this fea-
ture is not being used in a design, the INSER-
TION_DETECT signal must be grounded.
Note: This function is only available in specific
device configurations.
Dead Battery
Enable
VSAFEDB_EN O8 This active high output signal is used to enable the dead
battery supply on a USB Standard-B (STD-B) receptacle
(consumer/provider) AC adapter. When no voltage has
been detected on VBUS, this signal is asserted every
10 s to back power an attached provider/consumer and
determine whether the attached device has specified to
be powered per the dead battery mechanisms specified
in the PD specification.
Note: This function is only available in specific
device configurations.
External Power
Source Detect
EXT_PWR_DET IS This active high signal is used to indicate an external
power source is installed. This input can be utilized as a
standard digital input, or a resistive voltage divider can be
used to determine if the wall power AC adapter or char-
ger is plugged into the platform (i.e., a qualifying “Exter-
nally Powered” status has occurred, according to the
USB Power Delivery Specification). In a typical applica-
tion, this signal level will be set by a resistor divider of the
DC barrel voltage to satisfy the device logic levels and
level tolerance.
When this signal is high, the “externally powered” bit of
the VSafe5V Fixed Supply PDO for a provider will be set.
This signal will also help determine the preferences on
role swaps. Refer to Section 3.3.4, "USB Power Delivery
Role Selection," on page 26 for additional information.
Note: This function is only available in specific
device configurations.
TABLE 2-2: PIN DESCRIPTIONS (CONTINUED)
Name Symbol
Buffer
Type
Description
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P46

UPD1002-AI/MQ

Mfr. #:
Buy UPD1002-AI/MQ
Manufacturer:
Microchip Technology
Description:
USB Interface IC USB Power Delivery Controller 32 QFN
Lifecycle:
New from this manufacturer.
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