参数资料
型号: SI3232PPT0-EVB
厂商: Silicon Laboratories Inc
文件页数: 66/128页
文件大小: 0K
描述: BOARD EVAL W/SI3200 INTERFACE
标准包装: 1
系列: ProSLIC®
主要目的: 接口,模拟前端(AFE)
已用 IC / 零件: Si3232
已供物品: 板,CD
Si3232
42
Preliminary Rev. 0.96
Not
Recommended
fo
r N
ew
D
esi
gn
s
4.11. Loop Closure Mask
The Dual ProSLIC implements a loop closure mask to
ensure mode change between Ringing and Active or
On-hook Transmission without causing an erroneous
loop-closure detection. The loop-closure mask register,
LCRMASK, should be set such that loop-closure
detections are ignored for (LCRMASK x 1.25 ms/LSB)
amount of time. The programmed time is set to mask
detection of transitional currents that occur when exiting
the ringing mode while driving a reactive load (i.e.,
5 REN). A typical setting is 80 ms (LCRMASK = 0x40).
Figure 20. Ring Trip Detect Processing Circuitry
Input
Signal
Processor
Digital
LPF
+
_
AC Ring Trip
Threshold
RTPER
LFS
ILOOP
RTACTH
Debounce
Filter_AC
Interrupt
Logic
RTRIPS
RTP
RTRIPE
+
_
DC Ring Trip
Threshold
RTDCTH
RTACDB
Digital
LPF
Debounce
Filter_DC
RTDCDB
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