參數(shù)資料
型號(hào)： SI3225PPTX-EVB
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 71/112頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL W/DISCRETE INTERFACE
設(shè)計(jì)資源： Si3225PPTX-EVB Schematics/Layout
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： Si3225
已供物品： 板，CD
Si3220/25 Si3200/02
Rev. 1.3
61
Not
Recommended
fo
r N
ew
D
esi
gn
s
Setting the linefeed register to the opposite polarity
immediately reverses (hard reversal) the line polarity.
For example, to transition from Forward Active mode to
Reverse Active mode changes LF[2:0] from 001 to 101.
Polarity reversal is accommodated in the OHT and
ground start modes. The POLREV bit is a read-only bit
that reflects if the device is in polarity reversal mode.
For smooth polarity reversal, set the PREN bit to 1 and
the RAMP bit to 0 or 1 depending on the desired ramp
rate
(see
Polarity
reversal
is
then
accomplished by toggling the linefeed register from
forward to reverse modes as desired.
A wink function slowly ramps down the TIP-RING
voltage (VOC) to 1 followed by a return to the original
VOC value (set in the VOC RAM location). This scheme
lights a message-waiting lamp in certain handsets. No
change to the linefeed register is necessary to enable
this function. Instead, the user sets the VOCZERO bit to
1 so that the TIP-RING voltage collapses to 0 V at the
rate programmed by the RAMP bit. Setting the
VOCZERO bit back to 0 returns the TIP-RING voltage
to its normal setting. With a software timer, the user can
automate the cadence of the wink function. Figure 32
illustrates the wink function.
Figure 32. Wink Function with Programmable Ramp Rate
Table 33. Register and RAM Locations used for Polarity Reversal
Parameter
Programmable Range
Register/RAM
Bits
Register/RAM
Mnemonic
Linefeed
LF[2:0]
LINEFEED
Polarity Reversal Status
Read only
POLREV
Wink Function
(Smooth transition to Voc=0V)
1 = Ramp to 0 V
0 = Return to previous VOC
VOCZERO
POLREV
Smooth Polarity Reversal Enable
0 = Disabled
1 = Enabled
PREN
POLREV
Smooth Polarity Reversal Ramp
Rate
0=1V/125 s
1=2V/125 s
RAMP
POLREV
V
TIP/RING (V)
0
-10
-20
-30
-40
-50
Time (ms)
50
40
30
20
10
60
70
80
0
2 V/125 s slope
set by RAMP bit
Set VOCZERO bit to 1
Set VOCZERO bit to 0
V
cm
V
ov
V
oc
V
TIP
V
BAT
V
RING
相關(guān)PDF資料
PDF描述
LGU2E181MELY CAP ALUM 180UF 250V 20% SNAP
SI3225DCX-EVB DAUGHTER CARD W/DISCRETE INTRFC
SK102M050ST CAP ALUM 1000UF 50V 20% RADIAL
M3TTK-3036J IDC CABLE - MSD30K/MC34G/MSD30K
SI3225DC0-EVB DAUGHTER CARD W/SI3200 INTERFACE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3225-X-FQ 制造商:SILABS 制造商全稱:SILABS 功能描述:DUAL PROSLIC㈢ PROGRAMMABLE CMOS SLIC/CODEC
SI3225-X-GQ 制造商:SILABS 制造商全稱:SILABS 功能描述:DUAL PROSLIC㈢ PROGRAMMABLE CMOS SLIC/CODEC
SI3226 制造商:SILABS 制造商全稱:SILABS 功能描述:Dual ProSLIC㈢ with DC-DC Controller
SI32260 制造商:SILABS 制造商全稱:SILABS 功能描述:Two complete FXS channels in 8X8 mm Perfroms all BORSCHT functions ldel for short-or long-loop applications
SI32260CBB20SL0EVB 制造商:Silicon Laboratories Inc 功能描述:BOARD EVAL SI32260-C DUAL FXS
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*