Freescale Semiconductor, Inc.

Schematic and Parts List

Semiconductor, Inc.

Vbat

 

 

Q2

2N3906

 

 

 

R3

47

D1

IR LED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R6

470

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

47K

R2

330

 

Q1 2N3904

 

 

D2

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R4

1K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PTA0

JP4

 

 

R5 47K

 

PTA1ATD1

 

PTA2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

DISCIR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

7

 

6

 

5

PIN8NITRONADC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U1

VddVss

 

PTA5/OSC1/AD3/KBI5PTA0/AD0/TCH0/KBI0

 

PTA4/OSC2/AD2/KBI4PTA1/AD1/TCH1/KBI1

PTA3/RST/KBI3PTA2/IRQ/KBI2

Vdd

 

 

 

R9

3.3K

POWER

SW1

R11

PAUSE

SW2

R12

PLAY

SW3

R15

FWD

SW6

STOP

SW5

REV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.7K

 

 

2.2k

 

 

1k

R14

470

 

R13

220

 

 

 

 

 

 

 

 

 

 

 

 

 

JP3

DISCSW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

2

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Vdd

 

 

1

 

2

R10

3

 

4

 

 

 

 

 

 

 

 

PTA1 ATD1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16MHz

10M

 

 

 

R8

47K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PTA5

PTA4

Vdd

 

 

 

 

Board Schematic

 

SW4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 4-1. ASB520 PC

Freescale

Vdd

 

 

C2

0.1

 

 

 

JP2

 

 

 

2

2

1

 

 

 

DISC

R7

10

 

 

 

 

 

CAP

Vbat

2

 

TEST

 

JP1

1 2

 

 

 

1

 

Idd

 

 

1

 

 

 

 

+

 

 

 

BAT1

 

BATTERY

 

 

-

 

 

 

 

2

 

 

 

+

1 C1

470uF

 

21

43

PTA2

PTA0

PTA4

PTA1 ATD1

1413

1615

CONNECTOR

J1

65

87

109

1211

 

2 4 6 8

10 12 14 16

 

 

1 3 5 7 9 11 13 15

MON08

 

 

 

 

 

 

 

 

 

Vdd

 

 

 

 

 

 

 

 

 

PTA5

 

 

DRM045

Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board

 

 

 

18

Schematic and Parts List

MOTOROLA

For More Information On This Product,

Go to: www.freescale.com

Page 18
Image 18
Freescale Semiconductor M68HC08, MC68HC908QT2 manual Semiconductor, Inc

MC68HC908QT2, M68HC08 specifications

Freescale Semiconductor, known for its innovative solutions in the field of embedded systems, developed the M68HC08 microcontroller family, which includes the MC68HC908QT2. This 8-bit microcontroller is engineered to meet the demands of diverse applications, including automotive, industrial, and consumer electronics.

The MC68HC908QT2 is designed around Freescale’s M68HC08 core, which is renowned for its efficient and reliable performance. This microcontroller integrates a powerful instruction set, enabling developers to create high-performance applications with relatively low power consumption. The device operates at a clock frequency of up to 3 MHz, which is adequate for various control tasks.

One of the key features of the MC68HC908QT2 is its memory architecture. It includes a 2 KB Flash memory for program storage, representing a significant advantage for developers requiring non-volatile memory. Additionally, it encompasses 128 bytes of EEPROM memory, allowing for data retention even after power loss. The microcontroller also has 256 bytes of RAM for efficient data manipulation during operation.

In terms of input/output capabilities, the MC68HC908QT2 supports a variety of interfacing options. The microcontroller features up to 20 general-purpose I/O pins for flexibility in connecting with peripheral devices. Additionally, it provides multiple analog-to-digital converters (ADC) and timers that facilitate efficient analog signal processing and precise control through timing functions.

The architecture of the MC68HC908QT2 also incorporates sophisticated on-chip peripherals, enhancing its functionality. These peripherals include PWM (Pulse Width Modulation) outputs, which are essential for applications requiring motor control and other precise duty cycle processes. The integrated watchdog timer ensures reliable operation by resetting the system in the event of an application failure.

Moreover, the MC68HC908QT2 is equipped with an efficient power management system, enabling operation in a low-power mode, ideal for battery-powered applications. This microcontroller is packaged in a compact 28-pin dual in-line package (DIP), making it suitable for space-constrained designs.

In summary, the Freescale Semiconductor MC68HC908QT2 microcontroller is distinguished by its robust performance, extensive memory options, and versatile I/O capabilities. Its advanced features, including built-in timers, ADC, and a power management system, make it an exceptional choice for developers seeking to implement reliable and efficient embedded solutions. With its comprehensive architecture, the MC68HC908QT2 remains a popular choice in the landscape of 8-bit microcontrollers.