Why timer is required in serial communication in 8051?
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Serial Interface
The serial port of 8051 is full duplex, i.e., it can transmit and receive simultaneously.
The register SBUF is used to hold the data. The special function register SBUF is physically two registers. One is, write-only and is used to hold data to be transmitted out of the 8051 via TXD. The other is, read-only and holds the received data from external sources via RXD. Both mutually exclusive registers have the same address 099H.
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The serial port of 8051 is full duplex, i.e., it can transmit and receive simultaneously.
The register SBUF is used to hold the data. The special function register SBUF is physically two registers. One is, write-only and is used to hold data to be transmitted out of the 8051 via TXD. The other is, read-only and holds the received data from external sources via RXD. Both mutually exclusive registers have the same address 099H.
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your ans is the serial communication registers of the 8051 and show how to program them to transfer and receive data serially. Since IBM PC/compatible computers are so widely used to communicate with 8051-based systems, we will emphasize serial communications of the 8051 with the COM port of the PC. To allow data transfer between the PC and an 8051 system without any error, we must make sure that the baud rate of the 8051 system matches the baud rate of the PC’s COM port. Some of the baud rates supported by PC BIOS are listed in Table 10-3. You can examine these baud rates by going to the Windows Hyper Terminal program and clicking on the Communication Settings option. The HyperTerminal program comes with Windows. HyperTerminal supports baud rates much higher than the ones listed in Table 10-3. please Mark Me brain list..
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