- 您現在的位置：買賣IC網 > PDF目錄16699 > AFE7222EVM (Texas Instruments)EVAL MODULE FOR AFE7222 PDF資料下載
參數資料
| 型號： | AFE7222EVM |
| 廠商： | Texas Instruments |
| 文件頁數： | 18/106頁 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR AFE7222 |
| 標準包裝： | 1 |
| 主要目的： | 接口，模擬前端（AFE） |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AFE7222 |
| 已供物品： | 板 |
| 其它名稱： | 296-30300 AFE7222EVM-ND |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁
REGISTER ADDRESS
(A11:A0)
SDATA
SCLK
SEN
REGISTER DATA
(D7:D0)
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
4
SERIAL PERIPHERAL INTERFACE
4.1
DESCRIPTION
The SPI (serial peripheral interface) is used to program the AFE7225/7222. It is used to read data from
and write data to the registers, from the rms/peak power meter and the auxiliary ADC. It is also used to
send data to the auxiliary DACs.
The interface is formed with pins SEN (Serial Interface Enable), SCLK (Serial Interface Clock), SDATA
(Serial interface input data) and SDOUT (Serial interface output data).
The serial shift of bits into the device is enabled when SEN is low. Serial data SDATA is latched at every
rising edge of SCLK when SEN is active (low). The SPI uses a 20-bit serial arrangement – the first 12-bits
are the register address, and the last 8-bits represent the data for the address.
The interface can work with SCLK frequency from a frequency of 40MHz down to a few Hertz and also
with non-50% SCLK duty cycle.
Direct access modes exist for reading from the auxiliary ADC and writing to the auxiliary DACs by using
the SPI pins.
Figure 4-1. Timing
Address bits (A11:A8) are referred to as the Page address of the register, and address bits (A7:A0) are
referred to as the Row address of the register.
4.2
SPI REGISTER READOUT
Data stored in a register corresponding to a page can be read out by programming the readout bit
corresponding to that page. The read out bit for a register addressed by (A11:A0) is the D0 bit of the
register with the Page address of (A11:A8) and row address of 00000000.
To read out a particular register, the following steps have to be followed:
1. Configure SDOUT as a digital output pin using bits
2. Set the register specific readout bit. This bit can be set by writing the following 20-bit sequence –
A11:A8,00000000,00000001 where (A11..A8) is the page address of the register whose contents are
desired to be read out
3. Once in the readout mode, write the address of the register to be readout as below. The new data
write is ignored. The data contents of the register come out serially on the SDOUT pin (with MSB first
format) as shown below.
Copyright 2011–2012, Texas Instruments Incorporated
SERIAL PERIPHERAL INTERFACE
19
相關PDF資料 |
PDF描述 |
|---|---|
| ECE-V1EA100NP | CAP ALUM 10UF 25V 20% SMD |
| 0210491116 | CABLE JUMPER 1.25MM .305M 39POS |
| UPM1J270MED1TD | CAP ALUM 27UF 63V 20% RADIAL |
| RNF-100-1-1/4-RD-SP | HEAT SHRINK TUBING |
| RNF-100-1-1/4-BU-SP | HEAT SHRINK TUBING |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AFE7222IRGC25 | 功能描述:射頻前端 Dual 12B,65MSPS ADC RoHS:否 制造商:Skyworks Solutions, Inc. 類型: 工作頻率:2.4 GHz, 5 GHz 最大數據速率:54 Mbps 噪聲系數: 工作電源電壓:3.3 V 電源電流:180 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-32 |
| AFE7222IRGCR | 功能描述:射頻前端 Dual 12B,65MSPS ADC RoHS:否 制造商:Skyworks Solutions, Inc. 類型: 工作頻率:2.4 GHz, 5 GHz 最大數據速率:54 Mbps 噪聲系數: 工作電源電壓:3.3 V 電源電流:180 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-32 |
| AFE7222IRGCT | 功能描述:射頻前端 Dual 12B,65MSPS ADC RoHS:否 制造商:Skyworks Solutions, Inc. 類型: 工作頻率:2.4 GHz, 5 GHz 最大數據速率:54 Mbps 噪聲系數: 工作電源電壓:3.3 V 電源電流:180 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-32 |
| AFE7225 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Analog Front End Wideband Mixed-Signal Transceiver |
| AFE7225EVM | 功能描述:射頻開發工具 AFE7225 Eval Mod RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
發布緊急采購，3分鐘左右您將得到回復。