Find the TH1 value in decimal  to set the baud rate to 9600, if SMOD=1. Assume that XTAL 11.0592 MHz-24-12-3-6

To calculate the TH1 value for a baud rate of 9600 with SMOD=1 and XTAL 11.0592 MHz, you can use the following formula:

TH1 = 256 - (XTAL / (12 * 32 * Baud Rate))

Here, XTAL is the crystal frequency, which is 11.0592 MHz in this case. The baud rate is 9600. The factor of 12 comes from the fact that the 8051 divides the crystal frequency by 12 to get the machine cycle frequency. The factor of 32 comes from the fact that in mode 1, the 8051 serial port operates at 32 times the machine cycle frequency.

Substituting the given values into the formula, we get:

TH1 = 256 - (11.0592 MHz / (12 * 32 * 9600)) = 256 - (11.0592 * 10^6 / (12 * 32 * 9600)) = 256 - (11.0592 * 10^6 / 3686400) = 256 - 3 = 253

So, the TH1 value to set the baud rate to 9600 with SMOD=1 and XTAL 11.0592 MHz is 253 in decimal.