TXSTA TRANSMIT STATUS AND CONTROL REGISTER - Parallel Ports and Serial Communication

TL;DR

Excess Tear (TXS Tear) is a control register used for serial communication, with various bits determining the mode, baud rate, and transmission method.

Transcript

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Key Insights

• 🎮 Excess Tear is a control register used for serial communication in microcontrollers.
• 📳 It determines the mode of communication, such as master or slave.
• 🫦 The TX9 bit controls the number of bits being transmitted, with options for 8-bit or 9-bit transmission.
• ☠️ The baud rate is determined by the BRGS and PRGS bits, with the option for faster operation by doubling the baud rate.
• 👻 Excess Tear allows for synchronous or asynchronous transmission modes.
• ®️ It has specific registers for transmitting and receiving data, such as the TX re-register and the TSR.
• 🫦 The data is transmitted serially with one start bit, one stop bit, and the data bits in between.

Questions & Answers

Q: What is Excess Tear (TXS Tear) and what is its purpose?

Excess Tear is a control register used in serial communication. It is responsible for serially transmitting data between microcontrollers. It controls various aspects of the communication, such as mode, number of bits, and baud rate.

Q: How does the "master" or "slave" mode in Excess Tear work?

The master and slave mode is determined by the value of a specific bit in the control register. If the bit is set to 1, the microcontroller will be the master, and if it's set to 0, it will be the slave.

Q: What is the significance of the TX9 bit in Excess Tear?

The TX9 bit determines whether the transmission is 8-bit or 9-bit. Setting it to 1 enables 9-bit transmission, while setting it to 0 enables 8-bit transmission. This is important when deciding the format of the transmitted data.

Q: How does the baud rate affect the operation of Excess Tear?

The baud rate is determined by the BRGS and PRGS bits in the control register. Setting these bits to 1 doubles the baud rate, resulting in faster operation. Setting them to 0 maintains a simple baud rate calculation.

Summary & Key Takeaways

• Excess Tear is a control register used for serial communication, specifically for serially transmitting data.

• It has multiple bits that determine the mode of communication, such as master or slave, and the number of bits being transmitted.

• Other bits control the baud rate, data transmission enable, and synchronous/asynchronous modes.