Selecting the Baud Rate Generators, Rclck Tclck

SERIAL I/O PORT

You may configure timer 2 as a timer or a counter. In most applications, it is configured for timer operation (i.e., the C/T2# bit is clear in the T2CON register).

Table 10-5. Selecting the Baud Rate Generator(s)

RCLCK	TCLCK	Receiver	Transmitter
Bit	Bit	Baud Rate Generator	Baud Rate Generator

0	0	Timer 1	Timer 1

0	1	Timer 1	Timer 2

1	0	Timer 2	Timer 1

1	1	Timer 2	Timer 2

Note:

Oscillator frequency

is divided by 2, not 12.

XTAL1

C/T2#

TR2

Timer 1	2	0
Timer 1
Overflow		1
	SMOD1
TH2	TL2	1
(8 Bits)	(8 Bits)	1
(8 Bits)	(8 Bits)
		0
		RCLCK
		1
		0
RCAP2H RCAP2L
		TCLCK

Clock

T2EX	EXF2	Interrupt
T2EX	EXF2	Request
		Request
	EXEN2

Note availability of additional external interrupt.

A4120-01

Figure 10-5. Timer 2 in Baud Rate Generator Mode

10-13

Embedded Microcontroller, 8XC251SP, 8XC251SA, 8XC251SQ, 8XC251SB specifications

The Intel 8XC251 series of embedded microcontrollers is a family of versatile and powerful devices, designed to meet the demands of a wide range of applications. With models such as the 8XC251SB, 8XC251SQ, 8XC251SA, and 8XC251SP, this series offers unique features while maintaining a high level of performance and reliability.

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One of the significant features of the 8XC251 family is its integrated peripherals, including timer/counters, serial communication interfaces, and interrupt systems. These peripherals enable developers to implement timing functions, data communication, and real-time processing, all of which are crucial in modern embedded applications. The 8XC251SB and 8XC251SQ models, for instance, come equipped with multiple I/O ports that allow for interfacing with other devices and systems, enhancing their functionality in various environments.

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Lastly, the 8XC251 series is supported by a wide range of development tools and resources, allowing engineers and developers to streamline the development process. This support, combined with the microcontrollers' robust features, makes the Intel 8XC251 family a reliable choice for various embedded applications, such as industrial automation, automotive systems, and consumer electronics.

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Intel 8XC251SA manual Selecting the Baud Rate Generators, Rclck Tclck, Receiver Transmitter Bit

Models: Embedded Microcontroller 8XC251SP 8XC251SA 8XC251SQ 8XC251SB

Table 10-5. Selecting the Baud Rate Generator(s)

RCLCK

TCLCK

Receiver

Transmitter

Bit

XTAL1

TR2

EXF2

Figure 10-5. Timer 2 in Baud Rate Generator Mode

Embedded Microcontroller, 8XC251SP, 8XC251SA, 8XC251SQ, 8XC251SB specifications