参数资料
型号: AS3517-T
厂商: ams
文件页数: 80/94页
文件大小: 0K
描述: IC CODEC AFE AUDIO STER 81-CTBGA
标准包装: 2,000
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: 带卷 (TR)
AS3517 V17
Data Sheet, Confidential
2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Table 83 System Register
Name
Base
Default
System
2-wire serial
E1h
System Settings Register
Offset: 20h
Controls the powering down conditions of the AFE. The IC can also be emergency shut
down by a high level for 5.4sec (or 10.9sec see reg. 24h) at the PWRUP input pin
This register is reset at a DVDD-POR.
Bit
Bit Name
Default
Access
Bit Description
7:4
Version <3:0>
1111
R
AFE number to identify the design version
1111: revision 7
3
HEARTBEAT_ON
0
R/W
Heartbeat (HBT) Watchdog
The watchdog counter will be reset by a rising edge at the HBT
input pin which has to occur at least every 500ms. If the
watchdog counter is not reset, the AFE will be powered down.
When start-up sequence #16-#25 is selected, no power down
is performed but a reset invoked via the XRES output pin
(pulse duration = 86s typ., 60s min)
0: HBT watchdog is disabled
1: HBT watchdog is enabled
2
JTEMP_OFF
0
R/W
Junction temperature supervision (level can be set in register
21h)
0: temperature supervision enabled
1: temperature supervision disabled
1
WATCHDOG_ON
0
R/W
2-wire serial interface watchdog
To reset the watchdog counter a 2-wire serial read operation
has to be performed at least every 500ms. If the watchdog
counter is not reset, the AFE will be powered down.
0: watchdog is disabled
1: watchdog is enabled
0
PWR_HOLD
1
R/W
0: power up hold is cleared and AFE is powered down
1: set to on after power on
Revision 1v3
80
- 93
ams
AG
Technical
content
still
valid
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