STW4810CRAT/LF ST-Ericsson Inc, STW4810CRAT/LF Datasheet - Page 15

• Manufacturer Part Number: STW4810CRAT/LF
• Description: IC PWR MNGMNT MULTIMEDIA 84VFBGA
• Manufacturer: ST-Ericsson Inc

Specifications of STW4810CRAT/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

Functional description
4
4.1
4.2
4.2.1
14/78
Functional description
Introduction
The STw4810 integrates all the power supplies for a multimedia processor as well as
memories and peripherals:
●
●
●
●
●
●
Digital control module
This module describes the interfaces used to program the device and the related registers.
State machine
Description of each states: (
Off: In this mode the STw4810 is switched off. Off is when PON=0, when battery level is
under 2.4 V or when thermal shutdown is activated. There is no multimedia processor power
supply. The only active cell is the USB cable detection and
OSC_START: Oscillator is enabled and the power up module is waiting for the rising edge of
the internal signal OSC_OK to start power up sequence. This state duration is 300 µs.
START_BIAS: Bias, reference and thermal shut-down are enabled, a counter is activated to
wait for rising edge of internal signals PDN_regulators. This state duration has a typical
value of 7.77 ms and a worst case value of 9.46 ms.
START_PM: after a 1 ms wait, multimedia processor power supplies are available
(VIO_VMEM, VCORE, VPLL, and VANA). The device can allow I2C communication, output
power supply monitoring and application (USB,SD/MMC).
OFF2: STw4810 is waiting for the 32 kHz multimedia processor signal. This state has an
indeterminate duration. If 32kHz is present during the states describes above, it has no
effect. The 32 kHz signal is taken into account by STw4810 only when the ‘VDDOK’ ball is
high, that is at the end of START_PM state.
Reset: STw4810 forces a reset during 10*32 kHz period before setting PORn high.
INT_OSC: The STw4810 can work without MASTER_CLK via its internal oscillator. The
device waits for an external clock detection before switching to the external clock. When
receiving a rising edge on PWREN ball (coming from multimedia processor) or on
TCXO_EN ball (coming from modem), STw4810 answers by asserting to “1” the
Two switched mode power supply regulators: one for the multimedia processor core,
one for
Three low-drop output regulators for multimedia processor analog supplies (PLL and
others) and auxiliary components
USB OTG FS/LS physical interface
MMC card power supplies and level shifters
Multimedia processor supply monitoring / power-on reset and power supply alarms /
interrupt management
Two serial I2C communication interfaces; one to control the devices (SDA, SCL) and
one to control the USB (USBSDA, USBSCL).
multimedia processor
Figure 3.
I/Os and memories
)
V
BAT
level detection.
STw4810