參數資料
| 型號： | 101-0575 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數： | 31/106頁 |
| 文件大?。?/td> | 0K |
| 描述： | COMPUTER SNGLBD BL2500 256K FLSH |
| 標準包裝： | 25 |
| 系列： | SBC |
| 模塊/板類型： | 單板計算機模塊 |
| 適用于相關產品： | BL2500 |
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Coyote (BL2500)
PB2 can be imagined to be a “DA0 voltage is too low” indicator. If DA0 is smaller than
the analog voltage presented at AD0, then PB2 will be true (high). If this happens, the pro-
gram will need to raise the DA0 voltage.
The A/D converter has no reference voltage. There is a relative accuracy between mea-
surements, but no absolute accuracy without calibration. This is because the +3.3 V supply
can vary ±5%, the pulse-width modulated outputs might not reach the full 0 V and 3.3 V
rails out of the Rabbit 3000 microprocessor, and the gain resistors used in the circuit have
a 1% tolerance. For these reasons, each Coyote needs to be calibrated individually, with
the constants held in software, to be able to rely on an absolute accuracy. The Coyote has
this calibration support.
An A/D conversion takes less than 100 ms with a 29.4 MHz Coyote.
3.4.2 D/A Converters
Two D/A converter outputs, DA0 and DA1, are supplied on the Coyote. These are shown
in Figure 14.
Figure 14. Schematic Diagram of D/A Converters
The D/A converters have no reference voltage. Although they may be fairly accurate from
one programmed voltage to the next, they do not have absolute accuracy. This is because
the +3.3 V supply can change ±5%, the PWM outputs might not achieve the full 0 V and 3.3 V
rail out of the processor, and the gain resistors in the circuit have a 1% tolerance. The D/A
converters therefore need individual calibration, with the calibration constants held in
software before absolute accuracy can be relied on. The Coyote has such calibration.
Note that DA0 is used to provide a reference voltage for the A/D converter and is unavail-
able for D/A conversion when the A/D converter is being used.
+
LM324
PF6
9
10
8
R6
24.9 kW
DA0
R4
1.0 kW
R12
10 kW
C2
100 nF
R7
24.9 kW
+
LM324
PF7
DA1
1.0 kW
100 nF
R10
24.9 kW
C5
R15
R13
24.9 kW
12
13
14
10 kW
R9
相關PDF資料 |
PDF描述 |
|---|---|
| 20-101-0526 | COMPUTER SNGLBD LP3510 FOX7.4MHZ |
| 101-0526 | COMPUTER SNGLBD LP3510 FOX7.4MHZ |
| 101-0576 | COMPUTER SNGLBD BL2510 256K FLSH |
| 20-101-1055 | MODULE RABBITCORE RCM3375 |
| 20-101-0434 | MODULE RABBITCORE RCM2100 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 101-0576 | 功能描述:單板計算機 BL2510 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 |
| 101-0577 | 功能描述:開發(fā)板和工具包 - 其他處理器 Programmers, Development Systems General Embedded Dev Boards and Kits (MCU, DSP, FPGA, CPLD) - KIT DEV FOR BL2500 COYOTE RoHS:否 制造商:Freescale Semiconductor 產品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| 101-0578 | 功能描述:開發(fā)板和工具包 - 其他處理器 BL25/OEM2500 DEVKIT INTERNTIONAL RoHS:否 制造商:Freescale Semiconductor 產品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| 101-0580 | 功能描述:子卡和OEM板 RabbitLink Card RoHS:否 制造商:BeagleBoard by CircuitCo 產品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| 10-105808-02P | 制造商:Amphenol Aerospace 功能描述:PLUG |
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