參數(shù)資料
型號: SI3232DCX-EVB
廠商: Silicon Laboratories Inc
文件頁數(shù): 56/128頁
文件大?。?/td> 0K
描述: DAUGHTER CARD W/DISCRETE INTRFC
標(biāo)準(zhǔn)包裝: 1
系列: ProSLIC®
主要目的: 接口,模擬前端(AFE)
已用 IC / 零件: Si3232
已供物品: 板,CD
Si3232
Preliminary Rev. 0.96
33
Not
Recommended
fo
r N
ew
D
esi
gn
s
Figure 14. Loop Closure Detection Circuitry
Table 19. Register and RAM Locations used for Loop Closure Detection
Parameter
Register/
RAM
Mnemonic
Register/RAM
Bits
Programmable
Range
LSB
Size
Resolution
Loop Closure Interrupt Pending
IRQVEC2
LOOPS
Yes/No
N/A
Loop Closure Interrupt Enable
IRQEN2
LOOPE
Yes/No
N/A
Linefeed Shadow
LINEFEED
LFS[2:0]
Monitor only
N/A
Loop Closure Detect Status
LCRRTP
LCR
Monitor only
N/A
Loop Closure Detect Debounce
Interval
LCRDBI
LCRDBI[15:0]
0 to 40.96 s
1.25 ms
Loop Current Sense
ILOOP
ILOOP[15:0]
0 to 101.09 mA
3.097
A
500
A1
Loop Closure Threshold (on-hook to
off-hook)
LCROFFHK
LCROFFHK[15:0]
0 to 101.09 mA2
3.097
A
396.4
A
Loop Closure Threshold (off-hook to
on-hook)
LCRONHK
LCRONHK[15:0]
0 to 101.09 mA2
3.097
A
396.4
A
Loop Closure Filter Coefficient
LCRLPF
LCRLPF[15:3]
0 to 4000h
N/A
Loop Closure Mask Interval
LCRMASK
LCRMASK[15:0]
0 to 40.96 s
1.25 ms
Notes:
1. ILOOP is a calculated value based on measured IQ1–IQ4 currents. The resulting effective resolution is approximately
500
A.
2. The usable range for LCRONHK and LCROFFHK is limited to 61 mA. Entering a value >61 mA disables threshold
detection.
I
Q1
LFS
LCRLPF
LCROFFHK
Input
Signal
Processor
Digital
LPF
Loop Closure
Threshold
Debounce
Filter
+
LCR
LCRONHK
LOOPS
LOOPE
Interrupt
Logic
LCRDBI
Loop
Closure
Mask
LCRMASK
I
Q2
I
Q5
I
Q6
CMH
I
LOOP
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