4-channel conversion between 5 Vdc TTL/CMOS and RS232. TD, RD, RTS, CTS support. Powered by pin/signals: 7(RTS), 4 (DTR), 3(TD; lines can be high or low, ... ... <看更多>
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4-channel conversion between 5 Vdc TTL/CMOS and RS232. TD, RD, RTS, CTS support. Powered by pin/signals: 7(RTS), 4 (DTR), 3(TD; lines can be high or low, ... ... <看更多>
串口COM口USB-TTL RS-232 RS-485 不同标准区别释疑, 其他, 硬件,RS232,TTL, 有几个概念玩嵌入式的同志经常搞混。也不怨谁，现在的卖家为了一点可怜的 ... ... <看更多>
RS-232 adds the legacy voltage values to the binary values (0/1 or hi/lo, or "mark" and "space" in RS-232 talk). A TTL UART will output (and ... ... <看更多>