Overview of Uart, Uart Operating Modes | Fujitsu MB89202, F202RA

CHAPTER 13 UART

13.1Overview of UART

UART is a general-purpose communication interface for serial data. UART allows variable-length serial data to be transferred synchronously or asynchronously with a clock. The transfer format is NRZ. The dedicated baud rate generator, external clock, or internal timer (8-bit PWM timer) settings determine the data transfer format.

■Functions of UART

UART supports (serial I/O) functions for sending serial data to, or receiving serial data from a CPU or peripheral functions.

The full-duplex double-buffer enables bi-directional full-duplex communication.

•Synchronous data transfer mode or asynchronous data transfer mode can be selected.

•The internal baud rate generator allows one of 14 baud rates to be selected. Also, external clock input and 8-bit PWM timer output allow user-defined baud rates to be specified.

•The length of data is variable. When no parity is used, 7 bits to 9 bits are available. When parity is used, 6 bits to 8 bits are available (Table 13.1-1).

•The data transfer format is NRZ (Non Return to Zero).

Table 13.1-2 provides the transfer rates of the dedicated baud rate generator, and Table 13.1-3provides the transfer rates of the external clock.

Table 13.1-1 UART Operating Modes

	Data length
Operating mode			Synchronization mode	Stop bit length
Operating mode	Parity not used	Parity used	Synchronization mode	Stop bit length
	Parity not used	Parity used

0	7 bits	6 bits	Synchronous/asynchronous	1 bit or 2 bits *

1	8 bits	7 bits	Synchronous/asynchronous	1 bit or 2 bits *

2	8+1 bits	-	Synchronous/asynchronous	1 bit or 2 bits *

3	9 bits	8 bits	Synchronous/asynchronous	1 bit or 2 bits *

*: Only one bit is allowed for the stop bit length when data is received. The second bit is ignored even if it is received.

280

F202RA, MB89202 specifications

The Fujitsu MB89202 and F202RA microcontrollers are part of the 16-bit microcontroller family, renowned for their robust performance and versatility in a variety of embedded system applications. These devices are tailored for high-efficiency operation across diverse industries, including automotive, consumer electronics, and industrial automation.

One of the main features of the MB89202 is its powerful CPU core, which operates at a clock speed of up to 20 MHz. This enables the microcontroller to perform complex calculations and consumer-grade applications seamlessly. The architecture is designed to handle multiple tasks effectively, making it suitable for real-time operations.

Memory capacity is a vital characteristic of the MB89202, featuring on-chip RAM and ROM configurations. The microcontroller can accommodate different memory variants, providing developers with flexibility in memory allocation based on their application requirements. This adaptability facilitates applications ranging from simple control systems to complex data processing tasks.

The F202RA variant extends the capabilities of the MB89202 by integrating advanced peripheral functions. It includes built-in timers, A/D converters, and serial communication interfaces, which are essential for interfacing with other hardware components or sensors. The availability of these peripherals reduces the need for additional external circuits, thus contributing to a more compact and cost-effective design.

In terms of power management, the MB89202 series employs advanced power-saving technologies. The microcontroller offers various low-power modes, enabling devices to conserve energy during idle times, making it highly suitable for battery-operated applications. This characteristic not only enhances the efficiency of devices but also extends their operational lifespan.

Moreover, the Fujitsu MB89202 series incorporates robust protection features, including watchdog timers and failure detection mechanisms. These safety features ensure reliable operation in critical systems, making them a preferred choice in applications where failure is not an option.

The MB89202 and F202RA microcontrollers also support a range of development tools and environments, including integrated development environments (IDEs) and software libraries, which facilitate rapid application development. With these tools, developers can efficiently prototype, debug, and optimize their applications.

In summary, the Fujitsu MB89202 and F202RA microcontrollers stand out with their efficient performance, extensive memory options, integrated peripherals, and power-saving capabilities, making them ideal for a wide array of embedded applications. Their reliability and robustness further enhance their attractiveness for designers seeking advanced microcontroller solutions.

Fujitsu MB89202, F202RA manual Overview of Uart, Uart Operating Modes

Models: F202RA MB89202

CHAPTER 13 UART

13.1Overview of UART

Table 13.1-1 UART Operating Modes

F202RA, MB89202 specifications