参数资料
型号: AS3658F-BCTP
厂商: ams
文件页数: 130/158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
Startup
Figure 56. Startup flow chart
Power on reset
xon_enable=0
batsw_on=0
batsw_mode=0
Reset registers
except
xon_enable
xon_enable=1 and
(chdet=0 or
USBChdet=0)
YES
NO
XON pin pulled
to GND
NO
YES
NO
V BAT >V ResVolt ?
NO
YES
Switch on
Battery switch
batsw_on=1
NO
Charger
detected ?
YES
ChEn=1
batsw_mode=1
NO
USB Sup.
detected and
YES
USB_ChEn=1
YES
ChDet=0?
V SUPPLY >V ResVolt ?
YES
Startup Device
Active state
batsw_mode
batsw_on
trickle
Switch on
0
1
1
1
batsw_on=0
batsw_mode=0
Switch off
X
0
power_off=1
YES
YES
NO
NO
V SUPPLY <V ResVolt ?
YES
batsw_on=0
batsw_mode=0
NO
force_reset=1
10.4.1 Normal Startup
During a normal reset cycle (e.g. after the battery or a charger is inserted; (see Reset generator and XON-Key on page
118) ), after V2_5 is above V POR and Vsupply is above VRESET RISE a normal startup happens:
The external capacitor on CREF is charged to 1.8V
The 3bit A/D conversion is performed to measure the external resistor value RPROGRAM
Startup State machine reads out the internal Boot-ROM (address defined by boot_ctrl ), Start sequence of Step-
Down Converter and LDO’s controlled by the Boot-ROM
Reset-Timer is set by the Boot-ROM
The reset is released when the Reset Timer expires (external pin XRESET)
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