電源面板 PP220 5.7" QVGA 單色液晶顯示器，帶觸摸屏（電阻式）；1 個 aPCI 插槽；64 MB SDRAM；256 kB SRAM；緊湊型閃存插槽（I 型）；ETH 10/100；RS 232；2xUSB；電池；金屬外殼，IP 65 防護等級（正面）；24 VDC
| 類型 | 單色液晶屏 |
| 對角線 | 5.7 英寸（144 毫米） |
| 顏色 | 8種灰色 |
| 解決 | QVGA，320 x 240 像素 |
| 對比 | 25:1 |
| 視角 | |
| 水平的 | 方向 R / 方向 L = 40° |
| 垂直的 | U 方向 = 40°/ D 方向 = 50° |
| 背光 | |
| 亮度 | 140 坎德拉/平方米 |
| 半亮?xí)r間 | 50,000 小時 |
| 過濾玻璃 | |
| 透射率 | - |
| 抗反射涂層 | - |
| 觸摸屏 | |
| 類型 | 郡澤 |
| 技術(shù) | 模擬，電阻（Gunze） |
| 控制器 | 漢普郡，串行，12 位 |
| 透射率 | 84% |
| COM1 | |
| 類型 | RS232，調(diào)制解調(diào)器功能，非電氣隔離 |
| 變體 | 9 針 DSUB 插頭 |
| UART | 16550 兼容，16 字節(jié) FIFO |
| 限度。波特率 | 115 千比特/秒 |
| CompactFlash 插槽 1 | |
| 類型 | 第一類 |
| USB | |
| 數(shù)量 | 2 |
| 類型 | USB 1.1 |
| 變體 | A型 |
| 傳輸率 | 低速 (1.5 Mbit/s)，全速 (12 Mbit/s) |
| 載流能力 | 限度。每個連接 500mA |
| 以太網(wǎng) | |
| 數(shù)量 | 1 |
| 控制器 | 麥菲特 DP83816 |
| 傳輸率 | 10/100 兆比特/秒 |
| 限度。波特率 | 100 兆比特/秒 |
Device drivers can register /sys hooks or entries; a specially registered callback function from the device driver gets executed when they are read or written. These callback functions—running in supervisor mode—may accept parameters, initiate bus transfers, invoke some processing, modify device-specific variables, and return integer values or character strings back to the user. This allows additional functionality; for example, the temperature sensor or auxiliary ADCs on the AD7877 touch-screen digitizer can be made available to user space.
Device drivers can be statically built into the kernel, or dynamically installed later as loadable modules. Linux kernel modules (LKMs) are dynamic components that can be inserted and removed at run time. This is especially valuable to driver developers since time is saved by quicker compilation and by not having to reboot the system to test the module. By letting the hardware drivers reside in modules that can be loaded into the kernel at any time, it is possible to save RAM when the specific hardware is not in use.