STW4810CRAE/LF ST-Ericsson Inc, STW4810CRAE/LF Datasheet - Page 42

• Manufacturer Part Number: STW4810CRAE/LF
• Description: IC PWR MNGMNT MULTIMEDIA 84VFBGA
• Manufacturer: ST-Ericsson Inc

Specifications of STW4810CRAE/LF

• Applications: Processor
• Current - Supply: 170µA
• Voltage - Supply: 2.7 V ~ 4.8 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 84-VFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STw4810
4.4.2
VBUS monitoring
These comparators monitor the VBUS voltage. They detect the current status of the VBUS
line:
●
●
●
These three bits generate an interrupt when active (see USB interrupt registers).
VUSB LDO: Internal regulator which provides power supply for the bus driver and receiver.
ID detector: This block detects the status of the ID line. It is capable of detecting three
different states of line: ball is floating ID_FLOAT high, ball is tied to ground ID_GND high and
ball ID is grounded via resistor. This detection generates interrupts (see USB interrupt
registers).
Transceiver: The driver can operate in several different modes. It can act as a classical low-
speed and full-speed differential driver, as two independent single-ended drivers or as a
single-ended driver in UART mode. This block contains one differential receiver for the USB
mode of operation and two single-ended receivers for USB signaling and UART mode.
DP monitor: This block is used to detect car kit peripheral (0.6 V on DP).
Pull up and pull down resistor: Configurable integrated pull-up and pull-down resistor of
data line and VBUS.
Modes and operations
Power modes
The transceiver power modes are:
●
●
●
In suspended power mode the differential transmitter and receiver are turned off to save
power but the USB interface is still active (pull-up and pull-down on, VBUS on). In power
down mode, only the serial interface is active and the transceiver is able to detect SRP. In
power down mode, ID ball sensing can be turned on/off via a control bit in the control
registers.
USB modes
The two transceiver modes are:
●
●
VBUS > 4.4 V means VBUS_VALID
2 V<VBUS<4.4 V means SESSION_VALID
VBUS<0.8 V means SESSION_END
Active power mode
Suspended power mode
Power down mode
DAT_SEO mode (dat_se0 = 1 in USB control register 1 -
VP_VM mode (dat_se0 = 0 in USB control register 1 -
Table 11
Table 11
Functional description
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