參數(shù)資料
型號： 20-101-1217
廠商： Rabbit Semiconductor
文件頁數(shù)： 36/138頁
文件大?。?/td> 0K
描述： MODULE RABBITCORE RCM3229
標(biāo)準(zhǔn)包裝： 50
系列： RabbitCore®
模塊/板類型： MPU 核心模塊
適用于相關(guān)產(chǎn)品： RCM3229
產(chǎn)品目錄頁面： 620 (CN2011-ZH PDF)
其它名稱： 316-1146
124
RabbitCore RCM3200
E.6 Quadrature Decoder
The two-channel Quadrature Decoder accepts inputs via Parallel Port F from two external
optical incremental encoder modules. Each channel of the Quadrature Decoder accepts an
in-phase (I) and a quadrature-phase (Q) signal, and provides 8-bit counters to track shaft
rotation and provide interrupts when the count goes through the zero count in either direc-
tion. The Quadrature Decoder contains digital filters on the inputs to prevent false counts
and is clocked by the output of Timer A10. Each Quadrature Decoder channel accepts
inputs from either the upper nibble or lower nibble of Parallel Port F. The I signal is input
on an odd-numbered port bit, while the Q signal is input on an even-numbered port bit.
There is also a disable selection, which is guaranteed not to generate a count increment or
decrement on either entering or exiting the disable state. The operation of the counter as a
function of the I and Q inputs is shown below.
Figure E-2. Operation of Quadrature Decoder Counter
The Quadrature Decoders are clocked by the output of Timer A10, giving a maximum
clock rate of one-half of the peripheral clock rate. The time constant of Timer A10 must be
fast enough to sample the inputs properly. Both the I and Q inputs go through a digital fil-
ter that rejects pulses shorter than two clock periods wide. In addition, the clock rate must
be high enough that transitions on the I and Q inputs are sampled in different clock cycles.
The Input Capture (see the Rabbit 3000 Microprocessor Users Manual) may be used to
measure the pulse width on the I inputs because they come from the odd-numbered port
bits. The operation of the digital filter is shown below.
00 01 02 03 04 05 06 07 08 07 06 05 04 03 02 01 00 FF
I input
Q input
Counter
Interrupt
Rejected
Accepted
Peri Clock
Timer A10
相關(guān)PDF資料
PDF描述
20-101-0494 MODULE RABBITCORE RCM2250
AT25020N-10SI-2.7 IC EEPROM 2KBIT 2.1MHZ 8SOIC
345-030-521-801 CARDEDGE 30POS DUAL .100 GREEN
12FMN-BMTTN-A-TF CONN FMN HSNG 12POS STAG NOR SMD
AT25020-10PI-2.7 IC EEPROM 2KBIT 2.1MHZ 8DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
20-101-1220 功能描述:單板計算機 BL4S200 (RCM4310-based) RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類型:Intel Atom D510 頻率:1.66 GHz 存儲容量:2 GB (max) 存儲類型:DDR2, L2 Cache 接口類型:Ethernet, PS/2, SATA, Serial, USB 工作電源電壓:5 V, 12 V 功耗:13 W 最大工作溫度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-1221 功能描述:射頻模塊 RCM4400W Japan Telec Certfied RoHS:否 制造商:Linx Technologies 產(chǎn)品:Transceiver Modules 頻帶:902 MHz to 928 MHz 輸出功率:- 15.5 dBm to + 12.5 dBm 接口類型:UART 工作電源電壓:- 0.3 VDC to + 5.5 VDC 傳輸供電電流:38.1 mA 接收供電電流:22.7 mA 天線連接器類型:U.FL 最大工作溫度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
20-101-1235 功能描述:模塊化系統(tǒng) - SOM RCM5700 Minicore RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲容量:8 MB, 16 MB 存儲類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-1236 功能描述:界面開發(fā)工具 INTERFACE BOARD RCM56/57XX RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
20-101-1246 功能描述:模塊化系統(tǒng) - SOM RCM5400W RABBITCORE MODULE RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲容量:8 MB, 16 MB 存儲類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

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

*
*
*