参数资料
型号: AS3658F-BCTP
厂商: ams
文件页数: 131/158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
10.4.2 Startup from Charger
If the voltage on pin VCHARGER is within VSTART CHARGER , the AS3658 is started (even with V BAT = 0V). This
allows the battery to be charged (even from deeply discharged batteries) and finally a normal startup to happen.
Table 139. Charger Startup Conditions
Symbol
Parameter
Min
Typ
Max
unit
Note
Voltage on
VSTART CHARGER
VCHARGER for
4.0
5.0
15
V
on Pin VCHARGER
system to start
10.4.3 Programmable Startup Sequences—Boot ROM
The startup- and reset sequences of the device are highly configurable. The configuration of these sequences is
defined by the ratio of the internal trimmed bias resistors and RPROGRAM. At the beginning of each reset cycle a 3 bit
AD-conversion is performed. The result of this conversion is used to select 1 of 8 possible address-ranges of an
internal mask-programmable ROM. The information that is stored in this ROM defines the following parameters:
Voltage levels for all regulators and step down dcdc converters
power-on sequence of RF_1, RF_2, DIG_1, DIG_2, SD1, SD2 and SD3
duration of the reset cycle
several other configuration bits (e.g. charger)
The following values of R PROGRAM are used to select the 8 possible address ranges (8 different startup voltage /
sequences settings can be used):
000: open
001: 320k Ω
010: 160k Ω
011: 80k Ω
100: 40k Ω
101: 20k Ω
110: 10k Ω
111: 0 Ω
Table 140. Boot ROM Bits definitions
Addr:107
Boot_status
These bits show the boot status
Bit
2:0
3
Bit Name
rom_adr
rom_valid
Default
NA
1
Access
R
R
Description
Boot-ROM address
If ‘1’ Boot-ROM address is valid
Note: For detailed startup sequences see austriamicrosystems AG document AS3658_BootROM_*.
www.austriamicrosystems.com
Revision 1v13
130 - 157
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