 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
STW4810 Datasheet(PDF) 11 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
STW4810 Datasheet(HTML) 11 Page - STMicroelectronics |
|
|
11 / 72 page  STw4810 4 Functional description Rev3 11/72 4 Functional description 4.1 Introduction The STw4810 integrates all the power supplies for a multimedia processor as well as memories and peripherals: ● Two switched mode power supply regulators: one for the multimedia processor core, one for multimedia processor I/Os and memories ● 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). 4.2 Digital control module This module describes the interfaces used to program the device and the related registers. 4.2.1 State machine Description of each states: ( Figure 3.) 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 VBAT level detection. 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 REQUEST_MC ball. STw4810 remains in internal oscillator mode until it receives the external clock signal on MASTER_CLK ball. |
Similar Part No. - STW4810 |
|
Similar Description - STW4810 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
