TCLK

 

 

 

PTE0/TCLKB

 

 

 

INTERNAL

PRESCALER

PRESCALER SELECT

 

 

 

BUS CLOCK

 

 

 

 

 

 

 

TSTOP

 

PS2

PS1

PS0

TRST

 

 

 

 

 

 

16-BIT COUNTER

 

 

TOF

 

 

 

 

 

 

 

 

TOIE

16-BIT COMPARATOR

 

 

 

 

TMODH:TMODL

 

 

 

Functional Description

INTER-

RUPT

LOGIC

CHANNEL 0

16-BIT COMPARATOR

TCH0H:TCH0L

16-BIT LATCH

CHANNEL 1

16-BIT COMPARATOR

TCH1H:TCH1L

16-BIT LATCH

 

 

ELS0B

ELS0A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MS0A

 

 

ELS1B

ELS1A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MS1A

TOV0

CH0MAX

CH0F

CH0IE

MS0B

TOV1

CH1MAX

CH1F

CH1IE

PTE1 PTE1/TCH0B

LOGIC

INTER-

RUPT

LOGIC

 

PTE2

 

PTE2/TCH1B

 

 

 

LOGIC

 

 

 

 

 

 

 

INTER-

 

 

 

RUPT

 

 

 

LOGIC

 

 

 

 

 

 

Figure 17-2. TIMB Block Diagram

Addr.

Register Name

TIMB Status/Control Register

$0051(TBSC) See page 244.

TIMB Counter Register High

$0052(TBCNTH) See page 246.

TIMB Counter Register Low

$0053(TBCNTL) See page 246.

TIMB Counter Modulo Register

$0054High (TBMODH)

See page 246.

TIMB Counter Modulo Register

$0055Low (TBMODL)

See page 246.

 

Bit 7

6

5

4

3

2

1

Bit 0

Read:

TOF

TOIE

TSTOP

0

0

PS2

PS1

PS0

 

 

 

 

Write:

0

TRST

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

1

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

 

 

 

 

 

 

 

 

 

Write:

R

R

R

R

R

R

R

R

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

 

 

 

 

 

 

 

 

 

Write:

R

R

R

R

R

R

R

R

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

Read:

 

 

 

 

 

 

 

 

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

1

1

1

1

1

1

1

1

Read:

 

 

 

 

 

 

 

 

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

1

1

1

1

1

1

1

1

 

 

 

 

 

 

 

 

 

 

R

= Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 17-3. TIMB I/O Register Summary

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

Freescale Semiconductor

237

Page 236 Page 238
Page 237
Image 237
Freescale Semiconductor MC68HC908MR16, MC68HC908MR32 manual Timb Block Diagram
Page 236 Page 238

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.
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