rs 232c connector

state, which is different from the TTL to express the logical state in high and low levels. Therefore, in order to be able to connect with the computer interface or terminal TTL device, the EIA-RS-232C protocol and TTL circuit must be converted between the power level and the logical relationship, it can also be used as an integrated circuit chip. At present, it is widely used as an integrated circuit conv

high and low levels. Therefore, in order to be able to connect with the computer interface or terminal TTL device, the EIA-RS-232C protocol and TTL circuit must be converted between the power level and the logical relationship, it can also be used as an integrated circuit chip. At present, it is widely used as an integrated circuit converter. For example, the MC1488 and SN75150 chips can convert TTL levels

-232C protocol and TTL Conversion: The RS-232C protocol uses positive and negative voltage to represent the logical state, which is different from the TTL to express the logical state in high and low levels. Therefore, in order to be able to connect with the computer interface or terminal TTL device, the EIA-RS-

We know that the use of RS-232C protocols is well-developed in some areas of electrical and mechanical, and the basics of this are also described in previous articles. So as a supplement, we next to the RS-232C protocol interface signal to a comprehensive summary. I hope this will help you.

RS-232C interface definition (DB9) PIN definition symbols 1 Carrier Detection DCD (data carrier detect) 2 receive data rxd (received data) 3 send data txd (transmit data) 4 data terminal prepare DTR (Data Terminal ready) 5 signal SG (signal ground) 6 data prepare DSR (data set ready) 7 request to send RTS (request to send) 8. Clear send CTS (clear to send) 9. The ring indicator prompt is Ri (ring indicator)