8-bit Microcontrollers
MC9S08QD4/2
Target Applications
Overview
The MC9S08QD4/2 provides design flexibility
and integrated functionality for small
appliances and DC fans. The QD includes
up to 5.5V supply voltage, a 10-bit analog-
to-digital converter (ADC) and two timers for
improved motor control. The MC9S08QD
extends the advantages of the low-end S08
core as a low pin count, small package 8-bit
MCU. With pin and tool compatibility with
MC9RS08KA and MC9S08QG8, the QD
allows designers to move up and down the
performance chain quickly and easily.
Data Sheets
MC9S08QD MC9S08QD Data Sheet
• DC cooling fan
• Digital capacitive
• Industrial
• Camera zoom
• Walkie-talkies
ICS (0.2% resolution,
applications
discharge
ignition (CDI) for
motorcycles
compressors
control
Up to 4K flash
2% deviation)
Computers
Low-power
supplies
Battery chargers
256B RAM
COP
LVD
S08 CPU
• Vacuum cleaners
• Small and large
• Industrial control
• Watchdog
• Security systems
• Fan control
• AC voltage line
1 x 1-ch., 16-bit timer
1 x 2-ch., 16-bit timer
4-ch., 10-bit ADC
appliances
coprocessors
monitors
4 GPIO plus 1 in
Toasters
Low-end
microwaves
and 1 out
4 KBI
Features
8-bit HCS08 Central Processor Unit (CPU)
• Up to 8 MHz S08 CPU for 125 ns minimum
• HC08 instruction set with added
• Support for up to 32 interrupt/reset sources
• Supply voltage range of 2.7–5.5V
Integrated Third-Generation Flash Memory and RAM
• Embedded flash that is in-application
General Purpose Input/Output (GPIO) Lines
• Outputs 10 mA each; 100 mA max
• Four general-purpose input output (GPIO)
• One input-only and one output-only line
• Software selectable pull-ups on ports when
• Software selectable slew rate control and
• 4-pin keyboard interrupt module with software
• 1-ch. timer/pulse-width modulator; each
• Software-selectable pull-ups on ports when
• Software-selectable slew rate control and
• Single-wire background debug interface
• 8-pin plastic dual-inline package (PDIP) and
• Internal pull-up on reset and IRQ pin
instruction time
background instruction
reprogrammable over the full operating
voltage and temperature range with a single
power supply
for package
used as input; internal pull-up on reset and
interrupt request (IRQ) pin
drive strength on ports when used as output
selectable polarity on edge or edge/
level modes
channel can be used for input capture, output
compare, buffered edge-aligned PWM or
buffered center-aligned PWM
used as input; internal pull-up
drive strength on ports when used as output
8-pin narrow body small outline integrated
circuit (SOIC) packages
Benefits
• Backward object-code compatibility with
• Allows for efficient, compact module coding
• Allows for software flexibility and optimization
• Greater scalability of power and performance
• Provides users a single solution for multiple
• Allows for software flexibility and optimization
• High-current I/O allows direct drive of LED
• Helps to reduce customer system cost by
• Can configure ports for slower slew rate and
• Keyboard scan with programmable pull-ups/
• Reduce customer system cost
68HC08 and 68HC05 allows existing code
libraries to be used
in assembly or C compiler
for real-time applications
through range of voltage for application needs
platforms or a single platform that is field
reprogrammable in virtually any environment
for real-time applications
and other circuits to virtually eliminate
external drivers and to help reduce system
costs
eliminating need for external resistors
weaker drive to minimize noise emissions
from the MCU
pull-downs virtually eliminates external glue
logic when interfacing to simple keypads