參數(shù)資料
型號： Si3232
廠商： Electronic Theatre Controls, Inc.
英文描述： DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
中文描述： 兩個可編程的CMOS用戶接口與在線監(jiān)測
文件頁數(shù)： 45/128頁
文件大?。?/td> 2327K
代理商： SI3232
Si3232
Preliminary Rev. 0.96
45
4.12.1. Polarity Reversal
The Si3232 supports polarity reversal for message-
waiting functionality as well as various signaling modes.
The ramp rate can be programmed for a smooth
transition or an abrupt transition to accommodate
different application requirements. A wink function is
also provided for special equipment that responds to a
smooth ramp to V
OC
= 0 V. Table 27 illustrates the
register bits required to program the polarity-reversal
modes.
An immediate reversal (hard reversal) of the line polarity
is achieved by setting the Linefeed register to the
opposite polarity. For example, a transition from
Forward Active mode to Reverse Active mode is
achieved by changing LF[2:0] from 001 to 101. Polarity
reversal can also be accommodated in the OHT and
ground-start modes. The POLREV bit is a read-only bit
that reflects whether the device is in polarity reversal
mode. A smooth polarity reversal is achieved by setting
the PREN bit to 1 and setting the RAMP bit to 0 or 1
depending on the desired ramp rate (see Table 27).
Polarity reversal is then accomplished by toggling the
linefeed register from forward to reverse modes as
desired.
A wink function is used to slowly ramp down the TIP-
RING voltage (V
OC
) to 1 followed by a return to the
original VOC value (set in the VOC RAM 0 location).
This scheme is used to light a message-waiting lamp in
certain handsets. To enable this function, no change to
the linefeed register is necessary. Instead, the user
must set the VOCZERO bit to 1 to cause the TIP-RING
voltage to collapse to 0 V at the rate programmed by the
RAMP bit. Setting the VOCZERO bit back to 0 causes
the TIP-RING voltage to return to its normal setting. A
software timer provided by the user can automate the
cadence of the wink function. Figure 23 illustrates the
wink function.
Table 27. Register and RAM Locations used for Polarity Reversal
Parameter
Programmable Range
Register/RAM Bits
Location
Linefeed
See Table 12
LF[2:0]
LINEFEED
Polarity Reversal Status
Read only
POLREV
POLREV
Wink Function
(Smooth transition to Voc = 0 V)
1 = Ramp to 0 V
0 = Return to previous V
OC
0 = Disabled
1 = Enabled
VOCZERO
POLREV
Smooth Polarity Reversal Enable
PREN
POLREV
Smooth Polarity Reversal Ramp
Rate
0 = 1 V/125 μs
1 = 2 V/125 μs
RAMP
POLREV
相關(guān)PDF資料
PDF描述
Si3200-KS DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
Si3200-X-FS DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
Si3200-X-GS DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
Si3232-X-FQ DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
Si3232-X-GQ DUAL PROGRAMMABLE CMOS SLIC WITH LINE MONITORING
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3232-BQ 功能描述:電信線路管理 IC DUAL CH SLIC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-BQR 制造商:Silicon Laboratories Inc 功能描述:
SI3232DC0-EVB 功能描述:子卡和OEM板 Si3232 DAUGHTER CARD RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
SI3232DCX-EVB 功能描述:子卡和OEM板 Si3232 DAUGHTER CARD RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
SI3232-FQ 功能描述:電信線路管理 IC DUAL CH SLIC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*