- 您现在的位置：买卖IC网 > PDF目录16215 > SI3225DC0-EVB (Silicon Laboratories Inc)DAUGHTER CARD W/SI3200 INTERFACE PDF资料下载
参数资料
| 型号： | SI3225DC0-EVB |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 78/112页 |
| 文件大小： | 0K |
| 描述： | DAUGHTER CARD 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： | Si3225 |
| 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页当前第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
Si3220/25 Si3200/02
68
Rev. 1.3
Not
Recommended
fo
r N
ew
D
esi
gn
s
3.22. Pulse Metering Generation
The Si3220 offers an additional tone generator to
generate tones above the audio frequency band. This
oscillator generates billing tones that are typically
12 kHz or 16 kHz. The generator follows the same
algorithm as described in "3.20.1. Tone Generator
Architecture" on page 63 with the exception that the
sample rate for computation is 64 kHz instead of 8 kHz.
The equation is as follows:
where Full Scale VPK =0.5 V.
The pulse metering oscillator has a volume envelope
(linear ramp) on the on/off transitions of the oscillator.
The ramp is controlled by the value in the PMRAMP
RAM address, and the sinusoidal generator output is
multiplied by this volume before it is sent to the pulse
metering DAC. The volume value is incremented by the
value in PMRAMP at an 8 kHz rate. The volume will
ramp from 0 to 7FFF in increments of PMRAMP to allow
the value of PMRAMP to set the slope of the ramp. The
clip detector stops the ramp once the signal seen at the
transmit path exceeds the amplitude threshold set by
PMAMPTH, which provides an automatic gain control
(AGC) function to prevent the audio signal from clipping.
When the pulse metering signal is turned off, the
volume ramps down to 0 by decrementing according to
the
value
of
PMRAMP.
illustrates
the
functional blocks involved in pulse metering generation,
and Table 38 presents the required register and RAM
locations that must be set to generate pulse metering
signals.
Coeff
2
f
64000 Hz
--------------------------
cos
=
PMFREQ
coeff
2
14
1
–
=
PMAMPL
1
4
--- 1coeff
–
1
coeff
+
------------------------
2
15
1
–
Desired V
PK
FullScale V
PK
----------------------------------------
=
Table 38. Register and RAM Locations Used for Pulse Metering Generation
Parameter
Register/RAM
Mnemonic
Register/RAM
Bits
Description/Range
(LSB Size)
Pulse Metering Frequency
Coefficient
PMFREQ
PMFREQ[15:3]
Sets oscillator frequency
Pulse Metering Amplitude
Coefficient
PMAMPL
PMAMPL[15:0]
Sets oscillator amplitude
Pulse Metering Attack/Decay
Ramp Rate
PMRAMP
PMRAMP[15:0]
0 to PMAMPL
(full amplitude)
Pulse Metering Active Timer
PMTALO/PMTAHI
PULSETA[15:0]
0 to 8.19 s (125 s)
Pulse Metering Inactive Timer
PMTILO/PMTIHI
PULSETI[15:0]
0 to 8.19 s (125 s)
Pulse Metering, Control
Interrupt
IRQVEC1, IRQEN1
PULSTAE,
PULSTIE,
PULSTAS,
PULSTIS
Interrupt Status and control
registers
Pulse Metering AGC
Amplitude Threshold
PMAMPTH
PMAMPTH[15:0]
0 to 500 mV
PM Waveform Present
PMCON
ENSYNC
Indicates signal present
PM Active Timer Enable
PMCON
TAEN
Enable/disable
PM Inactive Timer Enable
PMCON
TIEN
Enable/disable
Pulse Metering Enable
PMCON
PULSE1
Enable/disable
相关PDF资料 |
PDF描述 |
|---|---|
| SEK220M400ST | CAP ALUM 22UF 400V 20% RADIAL |
| CP2201EK | KIT EVAL FOR CP2201 ETH CTRLR |
| PM1210-820J-RC | INDUCTOR 82UH 5% 1210 SMD |
| H3WWH-6036G | IDC CABLE - HPL60H/AE60G/HPL60H |
| UPS2C471MRD | CAP ALUM 470UF 160V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI3225DCX-EVB | 功能描述:子卡和OEM板 Si3225 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| Si3225-FQ | 功能描述:电信线路管理 IC Dual-Channel SLIC/ codec RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| SI3225-FQR | 制造商:Silicon Laboratories Inc 功能描述: |
| Si3225-G-FQ | 功能描述:电信线路管理 IC Dual-Channel SLIC codec RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| SI3225-G-FQR | 功能描述:电信线路管理 IC Dual-CH SLIC/codec Ext Ringing Support RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
发布紧急采购，3分钟左右您将得到回复。