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| 型号： | PWL6030B1AACMR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA187 |
| 封装： | 7 X 7 MM, 0.40 MM PITCH, GREEN, FCBGA-187 |
| 文件页数： | 50/97页 |
| 文件大小： | 937K |
| 代理商： | PWL6030B1AACMR |
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SWCS045B
– SEPTEMBER 2010 – REVISED JUNE 2011
PWRON: The PWRON ball is connected to a push button to control system power on/off. An internal pullup
on the battery domain is implemented on this input. Three timers are associated with this input duration:
– A short timer of 15 ms to confirm the key press detection. This confirmation initiates a power-on sequence
or generates an interrupt, depending on the system state.
– A long timer, programmable from 50 ms to 1.55 seconds, that measures the key press. A register bit is set
if the key press duration exceeds the timer duration.
– A very long timer of 10 seconds that causes a hardware switch-off of the system PWRON detection is
performed on falling and rising edges (one interrupt line, 1 interrupt status bit). The polarity of the PWRON
signal is active-low (key pressed).
RPWRON: Similar to PWRON, RPWRON controls system power on/off. An internal pullup on the battery
domain is implemented on this input. A short timer of 15 ms is implemented to confirm detection. Confirmation
initiates either a power-on sequence or a generation of an interrupt, depending on the system state. Detection
of RPWRON is performed on falling and rising edges. The polarity of RPWRON is active low (key pressed).
REGEN1, REGEN2: The power-management FSM controls these output signals. These balls are activated
during the power-on/off sequences. The timing of activation depends on the power sequence (EPROM).
REGEN1 and REGEN2 can be used to control two different external power supplies. The polarity of these
signals is active high.
SYSEN: This output signal is controlled by the power-management FSM and is activated during the
power-on/off sequences. The timing of activation depends on the power sequence. SYSEN can be used to
control an external power supply or a slave PM device. The polarity of SYSEN is active high.
Power State-Machine
The TWL6030 FSM controls boot sequences, Phoenix group state changes, and subsystems group initialization.
The power sequencing is made through broadcast commands (several resources accessed simultaneously
through broadcast commands or individual access to a resource. The power sequences are stored in a
hard-coded table (EPROM). The FSM reacts on events, which initiates power state transitions.
Hardware events
– Starting events (going into ACTIVE state)
– Power on button (PWRON ball)
– Remote power on (accessories) (RPWRON ball)
– Battery plug (VBAT ball)
– VAC detection
– USB VBUS detection
– USB ID detection
– RTC alarm
– Stopping events (going to OFF state)
– Short PWRON key press (interrupt to host IC, which initiates switch-off)
– Long PWRON key press (hardware switch-off)
– Remote power on (RPWRON) (interrupt to host IC, which initiates switch-off)
– Primary watchdog (hardware switch-off)
– Thermal shutdown (hardware switch-off)
– Backup events (going into NO SUPPLY or BACKUP state)
– Removal of main and/or backup battery
– Low main and/or backup battery
Software events
– Stopping events (going to OFF state)
– Group DEVOFF instruction (all groups are OFF)
– Software reset (SW_RESET) (going to OFF state and then restart to ACTIVE)
Internal hardware monitors the different energy sources (main and backup) and charging sources (VAC or
VBUS). A set of comparators is dedicated to energy source selection to generate an uninterrupted power supply
(UPR) which exists as soon as a valid energy source is present. The backup battery is considered to be a valid
energy source after the first power up of the device. POR is released when UPR rises above to POR threshold
54
Copyright
2010–2011, Texas Instruments Incorporated
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