參數(shù)資料
型號(hào)： 20-101-0356
廠商： Rabbit Semiconductor
文件頁(yè)數(shù)： 25/94頁(yè)
文件大?。?/td> 0K
描述： COMPUTER SINGLE-BOARD BL1800
標(biāo)準(zhǔn)包裝： 1
系列： Jackrabbit
模塊/板類(lèi)型： 單板計(jì)算機(jī)模塊
適用于相關(guān)產(chǎn)品： BL1800
產(chǎn)品目錄頁(yè)面： 618 (CN2011-ZH PDF)
其它名稱(chēng)： 316-1079
User’s Manual
27
The resolution of the DA0 output depends on the smallest increment of time to change the
on/off time (the time between 5 V and 0 V). The Jackrabbit uses the Rabbit 2000’s Port D
control registers to clock out the signal at a timer timeout. The timer used is timer B.
Timer B has 10 bits of resolution so that the voltage can be varied in 1/1024 increments.
The resolution is thus about 3.88 mV for the DA0 output voltage range of 0 V to 3 V in the
12%–88% duty cycle.
An LM324 op amp, which can comfortably source 10 mA throughout the D/A converter
range, drives the D/A converter output. If the output voltage is above 1 V, the D/A con-
verter can comfortably sink 10 mA. Below 1 V, the D/A converter can only sink a maxi-
mum of 100 A.
The peak-to-peak ripple on DA0 is less than 3 mV. There is a way to get rid of the ripple
for very small periods of time. To do that, simply program the PWM port from a PWM
output to a high-impedance input. This will allow the capacitor to hold the voltage subject
only to leakage currents, which add up to about 1 A. This will cause the capacitor to
change voltage at the rate of 10 V per second, or 10 mV per millisecond. Practically, this
means that the PWM can stop for about 1 ms (seven 1024-count D/A converter cycles on
a 14.74 MHz processor clock) with a voltage movement of less than 10 mV.
To summarize, DA0 is provided uncalibrated, can be programmed with a resolution of
3.88 mV and a peak-to-peak ripple less than 3 mV over the range from 0.1 V to 2.8 V and
at 3.35 V. The settling time to within 3 mV is 54 ms.
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20-101-0357 功能描述:單板計(jì)算機(jī) BL1810 SINGLE BOARD COMPUTER RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類(lèi)型:Intel Atom D510 頻率:1.66 GHz 存儲(chǔ)容量:2 GB (max) 存儲(chǔ)類(lèi)型:DDR2, L2 Cache 接口類(lèi)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
20-101-0358 功能描述:單板計(jì)算機(jī) BL1820 RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類(lèi)型:Intel Atom D510 頻率:1.66 GHz 存儲(chǔ)容量:2 GB (max) 存儲(chǔ)類(lèi)型:DDR2, L2 Cache 接口類(lèi)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
20-101-0383 功能描述:模塊化系統(tǒng) - SOM RCM2020 RabbitCore RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類(lèi)型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類(lèi)型:NOR Flash, SDRAM 接口類(lèi)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
20-101-0389 功能描述:子卡和OEM板 SR9200 16IN/8OUT RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-0390 功能描述:子卡和OEM板 SR9210 8 in/ 16 out RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
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