参数资料
型号: AS3517
厂商: ams
文件页数: 48/94页
文件大小: 0K
描述: IC CODEC AFE AUDIO STER 81-CTBGA
标准包装: 250
类型: 音频编解码器
应用: 便携式音频,电话
安装类型: 表面贴装
封装/外壳: 81-TFBGA
供应商设备封装: 81-CTBGA(9x9)
包装: 托盘
AS3517 V17
Data Sheet, Confidential
2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
9.3.4
Interrupt Generation
General
All interrupt sources can get enabled or disabled by corresponding bits in the 5 IRQ-bytes. By default no interrupt source is enabled.
The XIRQ output can get configured to be PUSH/PULL or OPEN_DRAIN and ACTIVE_HIGH or ACTIVE LOW with 2 bits in IRQ_ENRD_4
register (27h). Default state is open drain and active_low.
IRQ Source Interpretation
There are 3 different modules to process interrupt sources:
LEVEL
The IRQ output is kept active as long as the interrupt source is present and this IRQ-Bit is enabled
EDGE
The IRQ gets active with a high going edge of this source. The IRQ stays active until the corresponding IRQ-Register gets read.
STATUS CHANGE
The IRQ gets active when the source-state changes. The change bit and the status can be read to notice which interrupt was the source.
The IRQ stays active until the corresponding interrupt register gets read.
De-bouncer
There is a de-bounce function implemented for USB and CHARGER. Since these 2 signals can be unstable for the phase of plug-in or
unplug, a de-bounce time of 512ms/256ms/128ms can be selected by 2 bits in the IRQ_ENRD_4 register (27h).
Interrupt Sources
18 IRQ events will activate the XIRQ pin:
headphone connected
Microphone 1 connected
Microphone 2 connected
Microphone 1 remote control
Microphone 2 remote control
Voice activation threshold reached
RTC sec/min elapsed
10bit ADC end of conversion
IS changed
USB changed
Charger changed
End of charge (at 10% of programmed current )
Battery temperature high (at 42°C and 45°C with 100k
Ω NTC)
RVDD low (e.g. after battery was changed)
Battery low (Brown-out voltage reached)
wake-up from hibernation
power-up key (pin PWRUP) pressed
power rail monitor: PVDD1, PVDD2, CVDD1, CVDD2
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