- 您现在的位置：买卖IC网 > PDF目录16380 > SI3216PPQX-EVB (Silicon Laboratories Inc)BOARD EVAL W/DISCRETE INTERFACE PDF资料下载
参数资料
| 型号： | SI3216PPQX-EVB |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 49/122页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL W/DISCRETE 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： | Si3216 |
| 已供物品： | 板，CD |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页当前第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页
Si3216
32
Rev. 1.0
Not
Recommended
fo
r N
ew
D
esi
gn
s
Figure 18. Loop Closure Detection
2.1.6. Loop Closure Detection
A loop closure event signals that the terminal equipment
has gone off-hook during On-Hook Transmission or On-
Hook Active states. The ProSLIC performs loop closure
detection
digitally
using
its
on-chip
monitor
A/D
converter. The functional blocks required to implement
loop closure detection are shown in Figure 18. The
primary input to the system is the Loop Current Sense
value provided in the LCS register (direct Register 79).
The LCS value is processed in the Input Signal
Processor when the ProSLIC is in the On-Hook
Transmission or On-Hook Active Linefeed state, as
indicated by the Linefeed Shadow register, LFS[2:0]
(direct Register 64). The data then feeds into a
programmable digital low-pass filter, which removes
unwanted ac signal components before threshold
detection.
The output of the low-pass filter is compared to a
programmable threshold, LCRT (indirect Register 15).
The threshold comparator output feeds a programmable
debouncing filter. The output of the debouncing filter
remains in its present state unless the input remains in
the opposite state for the entire period of time
programmed by the loop closure debounce interval,
LCDI (direct Register 69). If the debounce interval has
been satisfied, the LCR bit will be set to indicate that a
valid loop closure has occurred. A loop closure interrupt
is generated if enabled by the LCIE bit (direct
Register 22). Table 25 lists the registers that must be
written or monitored to correctly detect a loop closure
condition.
2.1.7. Loop Closure Threshold Hysteresis
Programmable hysteresis to the loop closure threshold
can
be
enabled
by
setting
HYSTEN = 1
(direct
Register 108, bit 0). The hysteresis is defined by LCRT
(indirect Register 15) and LCRTL (indirect Register 66),
which set the upper and lower bounds, respectively.
2.1.8. Voltage-Based Loop Closure Detection
An optional voltage-based loop closure detection mode
is enabled by setting LCVE = 1 (direct Register 108,
bit 2). In this mode, the loop voltage is compared to the
loop
closure
threshold
register
(LCRT),
which
represents a minimum voltage threshold instead of a
maximum current threshold. If hysteresis is also
enabled, then LCRT represents the upper voltage
boundary and LCRTL represents the lower voltage
boundary for hysteresis. Although voltage-based loop
closure detection is an option, the default current-based
loop closure detection is recommended.
ISP_OUT
NCLR
LCDI
Input
Signal
Processor
Digital
LPF
Loop Closure
Threshold
D ebounce
Filter
+
–
LCR
LCIP
LCIE
Interrupt
Logic
LCS
LVS
LCVE
LFS
LCRTL
LCRT
HYSTEN
Table 25. Register Set for Loop
Closure Detection
Parameter
Register
Location
Loop Closure
Interrupt Pending
LCIP
Direct Reg.19
Loop Closure
Interrupt Enable
LCIE
Direct Reg. 22
Loop Closure Threshold
LCRT[5:0]
Indirect Reg.15
Loop Closure
Threshold—Lower
LCRTL[5:0]
Indirect Reg. 66
Loop Closure Filter
Coefficient
NCLR[12:0]
Indirect Reg. 22
Loop Closure Detect
Status (monitor only)
LCR
Direct Reg. 68
Loop Closure Detect
Debounce Interval
LCDI[6:0]
Direct Reg. 69
Hysteresis Enable
HYSTEN
Direct Reg. 108
Voltage-Based Loop
Closure
LCVE
Direct Reg. 108
相关PDF资料 |
PDF描述 |
|---|---|
| CM322522-2R7JL | INDUCTOR CHIP 2.7UH 3225 SMD |
| RBM12DTAI | CONN EDGECARD 24POS R/A .156 SLD |
| GBC28DREH | CONN EDGECARD 56POS .100 EYELET |
| SI3210PPQX-EVB | BOARD EVALUATION FOR SI3210 MLP |
| SI2401FS10-EVB | BOARD EVAL SI2401 UART INTERFACE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI32170-B-FM1 | 制造商:Silicon Laboratories Inc 功能描述:IC PROSLIC FXS 1CH -136V 42LGA |
| SI32170-B-FM1R | 制造商:Silicon Laboratories Inc 功能描述:FXS WITH DC-DC CONTROLLER (-136V MAX. BATTERY), DTMF DETECTI - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC PROSLIC FXS 1CH -136V 42LGA |
| SI32170-C-FM1 | 制造商:Silicon Laboratories Inc 功能描述:FXS WITH DC-DC CONTROLLER (-14 制造商:Silicon Laboratories Inc 功能描述:IC PROSLIC PCM/SPI -140V 42LGA |
| SI32170-C-FM1R | 制造商:Silicon Laboratories Inc 功能描述:FXS WITH DC-DC CONTROLLER (-140V MAX. BATTERY), DTMF DETECTI - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC PROSLIC PCM/SPI -140V 42LGA |
| SI32170-C-GM1 | 制造商:Silicon Laboratories Inc 功能描述:FXS WITH DC-DC CONTROLLER (-140V MAX. BATTERY), DTMF DETECTI - Trays 制造商:Silicon Laboratories Inc 功能描述:IC PROSLIC PCM/SPI -140V 42LGA |
发布紧急采购，3分钟左右您将得到回复。