外文文獻(xiàn)翻譯----微控制器-wenkub
2023-05-19 12:15:14 本頁面
【正文】 ）可實(shí)現(xiàn)已固定在最終應(yīng)用上的器件的編程。該功能也可配置為一個(gè)中斷。 ? 低電平復(fù)位輸入可由任何內(nèi)部復(fù)位驅(qū)動(dòng)。 ? 當(dāng)選擇片內(nèi)復(fù)位時(shí)， P89LPC952 只需連接電源和地?？撮T狗定時(shí)器具有獨(dú)立的片內(nèi)振蕩器，因此它可用于振蕩器的失效檢測。 ? 可控制口線輸出斜率以降低 EMI，輸出最小跳變時(shí)間約為 10ns。 ? 雙數(shù)據(jù)指針（ DPTR）。 Flash 可以字節(jié)為單位擦除、讀取或?qū)懭?。另外?IAP 和字節(jié)擦除功 能允許程序存 儲(chǔ)器用作非易失性數(shù)據(jù)存儲(chǔ)器。 P89LPC952 使用 VDD 電壓來執(zhí)行編程和擦除算法。 ?內(nèi)部固化的引導(dǎo) ROM，包含了可用于用戶程序的低級 IAP 子程序。這種配置為用戶提供了應(yīng)用的靈活性。 ?每個(gè)字節(jié)至少可執(zhí)行 100,000 次擦除 /編程。除了扇區(qū)擦除、頁擦除和字節(jié)擦除外，還包含一個(gè) 64 字節(jié)的頁寄存器，它可實(shí)現(xiàn)給定頁 1 到 64 字節(jié)的同時(shí)編程，這徹底降低了整個(gè)編程的時(shí)間。 5. Flash 的編程和擦除 有 4 種方法可實(shí)現(xiàn)對 Flash 的編程或擦除。第三，出廠時(shí)，器件的用戶代碼空間的高 512 字節(jié)包含一個(gè)串行 ISP 程序，調(diào)用該程序通過串口來實(shí)現(xiàn)在電路編程。 400 kHz bytewide I2Cbus munication port and SPI munication port. Highaccuracy internal RC oscillator option, with clock doubler option, allows operation without external oscillator ponents. The RC oscillator option is selectable and fine tunable. Fast switching between the internal RC oscillator and any oscillator source provides optimal support of minimal power active mode with fast switching to maximum performance. V to V VDD operating range. I/O pins are 5 V tolerant (may be pulled up or driven to V). 44pin packages with 40 I/O pins minimum while using onchip oscillator and reset options. Port 5 has high current sourcing/sinking (20 mA) for all Port 5 pins. All other port pins have high sinking capability (20 mA). A maximum limit is specified for the entire chip. Watchdog timer with separate onchip oscillator, requiring no external ponents. The watchdog prescaler is selectable from eight values. Additional features A high performance 80C51 CPU provides instruction cycle times of 111 ns to 222 ns for all instructions except multiply and divide when executing at 18 MHz. This is six times the performance of the standard 80C51 running at the same clock frequency. A lower clock frequency for the same performance results in power savings and reduced EMI. Serial flash InCircuit Programming (ICP) allows simple production coding with mercial EPROM programmers. Flash security bits prevent reading of sensitive application programs. Serial flash InSystem Programming (ISP) allows coding while the device is mounted in the end application. InApplication Programming
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