Character Format Selection | Freescale Semiconductor MC68HC908MR16

I/O Registers

Table 13-4. Character Format Selection

	Control Bits				Character Format

M		PEN:PTY	Start	Data	Parity	Stop	Character
M		PEN:PTY	Bits	Bits	Parity	Bits	Length
			Bits	Bits		Bits	Length

0		0X	1	8	None	1	10 bits

1		0X	1	9	None	1	11 bits

0		10	1	7	Even	1	10 bits

0		11	1	7	Odd	1	10 bits

1		10	1	8	Even	1	11 bits

1		11	1	8	Odd	1	11 bits

13.7.2 SCI Control Register 2

SCI control register 2 (SCC2):

•Enables these CPU interrupt requests:

–Enables the SCTE bit to generate transmitter CPU interrupt requests

–Enables the TC bit to generate transmitter CPU interrupt requests

–Enables the SCRF bit to generate receiver CPU interrupt requests

–Enables the IDLE bit to generate receiver CPU interrupt requests

•Enables the transmitter

•Enables the receiver

•Enables SCI wakeup

•Transmits SCI break characters

Address:	$0039
	Bit 7	6	5	4	3	2	1	Bit 0
Read:
Read:	SCTIE	TCIE	SCRIE	ILIE	TE	RE	RWU	SBK
Write:	SCTIE	TCIE	SCRIE	ILIE	TE	RE	RWU	SBK
Write:

Reset:	0	0	0	0	0	0	0	0

Figure 13-9. SCI Control Register 2 (SCC2)

SCTIE — SCI Transmit Interrupt Enable Bit

This read/write bit enables the SCTE bit to generate SCI transmitter CPU interrupt requests. Setting the SCTIE bit in SCC3 enables SCTE CPU interrupt requests. Reset clears the SCTIE bit.

1 = SCTE enabled to generate CPU interrupt

0 = SCTE not enabled to generate CPU interrupt

TCIE — Transmission Complete Interrupt Enable Bit

This read/write bit enables the TC bit to generate SCI transmitter CPU interrupt requests. Reset clears the TCIE bit.

1 = TC enabled to generate CPU interrupt requests

0 = TC not enabled to generate CPU interrupt requests

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

Freescale Semiconductor

171

MC68HC908MR16, MC68HC908MR32 specifications

Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are part of the popular HC08 family, designed primarily for embedded applications. These microcontrollers are particularly favored in automotive, industrial, and consumer product sectors due to their reliability and versatility.

One of the standout features of the MC68HC908MR series is its CMOS technology, which enhances performance while minimizing power consumption. This makes these microcontrollers suitable for battery-operated devices. They operate at a maximum clock frequency of 2 MHz and offer a 16-bit architecture, providing a solid balance between processing power and efficiency.

The MC68HC908MR32 variant is equipped with 32KB of flash memory, which allows for the storage of complex programs and extensive data handling. In contrast, the MC68HC908MR16 features 16KB of flash memory, making it ideal for simpler applications. Both microcontrollers also come with 1KB of RAM, enabling efficient data processing and real-time operations.

Another significant characteristic of these microcontrollers is their integrated peripherals. They come with multiple input/output (I/O) pins, which allow for connectivity with various sensors and actuators. The built-in timer systems offer precise timing control for automotive and industrial applications, while the Analog-to-Digital Converter (ADC) provides essential conversion capabilities for various analog signals.

For communication purposes, the MC68HC908MR series includes a serial communication interface, enabling easy integration with other devices and systems. This versatility facilitates the development of complex systems that require interaction with external components.

Security is another crucial aspect of these microcontrollers. They have built-in fail-safe mechanisms to ensure reliable operation under various conditions, making them suitable for critical systems. Additionally, their robust architecture helps to safeguard against potential disruptions or attacks.

In summary, Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are key players in the embedded systems landscape. Their blend of power efficiency, integrated features, and scalability ensures they remain relevant for a wide array of applications, making them a favored choice among engineers and developers looking for dependable solutions in a competitive market.

Freescale Semiconductor MC68HC908MR16 Character Format Selection, Control Bits Character Format

Models: MC68HC908MR16 MC68HC908MR32

Table 13-4. Character Format Selection

Control Bits