参数资料
型号: AS3658F-BCTP
厂商: ams
文件页数: 120/158页
文件大小: 0K
描述: IC PMU POWER/AUDIO 124-CTBGA
标准包装: 2,500
应用: 便携式设备
电流 - 电源: 7mA
电源电压: 3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 124-TFBGA
供应商设备封装: 124-CTBGA(8x8)
包装: 带卷 (TR)
AS3658
Data Sheet Confidential
- Detailed Description - System Functions
Voltage detection:
There are two types of voltage dependent resets: V POR and V XRESET . V POR monitors the voltage on V2_5 and
V XRESET monitors the voltage on VSUPPLY. The linear regulator for V2_5 is always on and uses the voltage
VCHARGER, V BAT or V_USB as its source.
The pin RESET is only released if V2_5 is above V POR and VSUPPLY is above VXRESET RISE .
Table 124. Reset Levels
Symbol
V POR
VXRESET RISE
Parameter
Overall power on reset
Reset level for Vsupply
rising
Min
1.5
Typ
2.0
ResVol
trise
Max
2.3
Unit
V
V
Note
Monitor voltage on V2_5; power on
reset for all internal functions
Monitor voltage on Vsupply; rising
level
VXRESET FALLING Reset level for Vsupply
falling
2.7
ResVol
tfall
V
V
Monitor voltage on VSupply; falling
level
if SupResEn=1 only
VRESET MASK
Mask time for
VXRESET FALLING
2.0
2.5
3.0
ms
Duration for V BAT <VXRESET FALLING
1
until a reset cycle is started
1. VRESET signal is debounced with the specified mask time for rising- and falling slope of V BAT .
VRESET FALLING is only accepted if the reset condition is longer than VRESET MASK . This guard time is used to avoid a
complete reset of the system in case of short drops of V BAT .
Power off:
To put the chip into ultra low power mode, write ‘1’ into xon_enable and ‘1’ into power_off . The chip stays in power off
mode until the external pin XON is pulled low, the charger is inserted or the level V POR is touched to start a complete
reset cycle. The bit power_off is automatically cleared by this reset cycle. During power_off state all circuits are shut-off
except the Low Power LDO (V2_5). Thus the current consumption of AS3658 is reduced to less than 15 μA. The digital
part is supplied by V2_5, all other circuits are turned off in this mode, including references and oscillator. Except the
reset control registers all other registers are set to their default value after power-on.
Software forced reset
Writing ‘1’ into the register bit force_reset immediately starts a reset cycle. The bit force_reset is automatically cleared
by this reset.
External triggered reset:
If the pin XRESET is pulled from high to low by an external source (e.g. microprocessor or button) a reset cycle is
started as well.
Overtemperature reset:
The reset cycle can be started by overtemperature conditions. (see Protection Functions on page 134)
Watchdog reset:
If the watchdog is armed (register bit wtdg_on = 1 and wtdg_res_on = 1) and the timer expires it causes a reset. (see
www.austriamicrosystems.com
Revision 1v13
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