參數(shù)資料
型號(hào)： PCF50603HN
廠商： ST-ERICSSON
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC48
封裝： 6 X 6 MM, 0.85 MM HEIGHT, SOT-778-1, PLASTIC, HVQFN-48
文件頁(yè)數(shù)： 4/28頁(yè)
文件大?。?/td> 147K
代理商： PCF50603HN
2003 Oct 31
12
Philips Semiconductors
Preliminary specication
Controller for power supply
and battery management
PCF50603
8.1.3
WATCHDOG TIMER
The OOC contains a WatchDog Timer (WDT). By default
it is not activated. It can be activated by setting
bit WDT_RST in the OOCC register to logic 1. Once this
bit has been set, the watchdog is enabled, and needs to be
cleared once every eight seconds. If the watchdog is not
reset in time, the PCF50603 automatically goes to the
STANDBY state when the watchdog timer expires. Status
bit WDTEXP is set when the watchdog timer expires. After
each ACTIVE to STANDBY transition the WDT is disabled
and needs to be activated again by software when
entering the ACTIVE state.
8.1.4
AUTOMATIC RESTART AFTER BATTERY REMOVAL
The PMU allows for an automatic restart from SAVE to
ACTIVE state when the main battery is removed for a
period less than two seconds (tBATRMLIM). This feature is
especially convenient to avoid accidental switch-off of the
phone due to mechanical bounce on the battery. The
automatic restart is enabled or disabled by control
bit BATRM_EN in the OOCC register. By default this
automatic restart feature is disabled.
Status bit BATRMSTAT in the OOCS2 register indicates
whether the PMU returned to ACTIVE state due to a restart
after battery removal. The status bit remains active until
the PMU returns to STANDBY or SAVE state.
Figure 6 shows the timing for an automatic restart due to
battery removal.
This feature is only triggered by battery removal
(VBAT < 2.7 V). All other shut-down conditions like, low
battery, high temperature, programming GO_STDBY do
not trigger this function.
This feature is only applicable upon the condition that a
BBC (VSAVE >VVERY_LOW_BACK) is available in the system.
handbook, full pagewidth
ACTIVE
system
state
ACTIVE
MCE539
SAVE
<tBATRMLIM
treset
VBAT
VLOW_BAT
VSAVE
CLK32K
xxVDD
BATRMSTAT
(internal status bit)
VLOW_BACK
VVERY_LOW_BAT
RSTHC_N
Fig.6 Automatic restart after battery removal.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF50604HN/03/2C,5 制造商:NXP Semiconductors 功能描述:PMU FOR MOBILE PHONES - Tape and Reel
PCF50604HN/04/2C,5 制造商:NXP Semiconductors 功能描述:PMU FOR MOBILE PHONES - Tape and Reel
PCF50605HN/10E/N1, 制造商:NXP Semiconductors 功能描述:PMU FOR SMARTPHONE, PDA & HDD - Tape and Reel
PCF50606HN/03A/N1, 制造商:NXP Semiconductors 功能描述:PMU FOR SMARTPHONE, PDA & HDD - Tape and Reel
PCF50606HN/04B/N1, 制造商:NXP Semiconductors 功能描述:PMU FOR SMARTPHONE, PDA & HDD - Tape and Reel
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