STW4810CRAE/LF ST-Ericsson Inc, STW4810CRAE/LF Datasheet - Page 48

• 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
4.4.3
USB enable control
STw4810 OFF
In this state, the overall system is able to detect USB connection through IT_WAKE_UP ball
and with VBUS session valid comparator and ID detection ON.
IT_WAKE_UP is activated (low level) in either of the two following cases:
STw4810 ON, USB driver not enabled
The USBINTn is now enabled.
If the USB cable is already connected while STw4810 is starting, the USB driver will be
enabled when power management is ready.
●
●
●
–
–
Wake-up USB driver conditions
–
–
–
–
Set condition: one among the following possibilities
–
–
–
Power down USB driver conditions in order to set the USB driver to power down mode:
–
–
When Mini A connector cable is connected and ID goes low
When activity on VBUS, i.e. a mini B is connected and is able to communicate.
This mode is used to wake-up the modem platform. In this configuration, USBINTn
ball is not enabled.
A plug-in on a mini A-device and active ID detector
B device is connected and ready to start data transfer, VBUS is driven high
(session valid high)
Activity on USB registers (00h to 0Fh -
ready to wake-up and set-up USB PHY.
Possibility to force PHY high (enable) when writing usb_en = 1 in USB EN register
(
External it_wake_up =0
usb_en = 1 by writing to I²C USB interface
Access to any other USB register (00h to 0Fh)
it_wake_up = 1, and only then
Set usb_en bit of USB EN register (
Table 17
)
Table 17
Table 9
) to “0”
to
Table 16
Functional description
). Multimedia processor
47/78