16-bit Microcontrollers
MC9S12DG256
Target Applications
> Automotive applications
> Industrial control
Features
High-Performance 16-bit HCS12 CPU Core
Benefits
> 25 MHz bus operation at 5V for 40 ns
minimum instruction cycle time
> Opcode compatible with the 68HC11
and 68HC12
> C-optimized architecture produces extremely
compact code
On-Chip Debug Interface
> Dedicated serial debug interface
> On-chip breakpoints
> Real-time in-circuit emulation and debug
without expensive and cumbersome
box emulators
> Read/write memory and registers while running
at full speed
Overview
Freescale Semiconductor’s HCS12 Family of
microcontrollers (MCUs) is the next generation of
the highly successful 68HC12 architecture. Using
Freescale’s industry-leading 0.25 µs Flash, the
MC9S12DG256 is part of a pin-compatible
family that scales from 32 KB to 512 KB of Flash
memory. The MC9S12DG256 provides an upward
migration path from Freescale’s 68HC08, 68HC11
and 68HC12 architectures for applications that
need larger memory, more peripherals and higher
performance. Also, with the increasing number of
CAN-based electronic control units (ECUs), its
multiple network modules support this environment
by enabling highly efficient communications
between different network buses.
Network Modules
> Two msCAN modules implementing the CAN
2.0 A/B protocol
• Five receive buffers per module with FIFO
storage scheme
• Three transmit buffers per module with
internal prioritization
Integrated Third-Generation Flash Memory
> Ability to link modules for higher
buffer count
> Programmable bit rate up to 1 Mbps
> FIFO receive approach superior for
event-driven networks
> In-application reprogrammable
> Self-timed, fast programming
• Fast Flash page erase—20 ms
(512 bytes)
• Can program 16 bits in 20 µs while
in burst mode
> 5V Flash program/erase/read
> Flexibility to change code in the field
> Efficient end-of-line programming
> Total program time for 256 KB code is less
than 10 seconds
> Reduces production programming cost
through ultra-fast programming
> No external high voltage or charge
pump required
> Virtual EEPROM implementation, Flash array
usable for EE extension
> Can erase one array while executing code
from another
HCS12 CPU
2 x SCI
3 x SPI
I
2
C
12 KB RAM
Internal Bus
> Flash granularity—512 byte Flash
erase/2 byte Flash program
> Four independently programmable
Flash arrays
> Flexible block protection and security
4 KB EEPROM
4 KB Integrated EEPROM
256 KB Flash
Vreg
5V to 2.5V
16-Key Wake-Up
IRQ Ports
ATD0
10-bit, 8-ch.
ATD1
10-bit, 8-ch.
> Flexible protection scheme for protection
against accidental program or erase
> EEPROM can be programmed in 46 µs
> Can erase 4 bytes at a time and program
2 bytes at a time for calibration, security,
personality and diagnostic information
Enhanced Capture Timer
16-bit, 8-ch.
2 x CAN
2.0 A/B
PWM
8-bit, 8 ch./16-bit, 4-ch.
Data Sheets
Features
10-bit Analog-to-Digital Converter (ADC)
Benefits
> Two 8-channel ADC
> 7 µs, 10-bit single conversion time, scan mode
available
> Fast, easy conversion from analog inputs like
position sensors, analog meters and
photovoltaic cells to digital values for
CPU processing
> Can effectively have 3.5 µs conversion time
by sampling same signal with both ADCs
Clock Generation Module with Phase-Lock Loop (PLL)
> Clock monitor with self clock mode in case of
no external clock
> Programmable clock frequency with 1024
options ranging from divide by 16 to multiply
by 64 from base oscillator
> Real-time interrupt
> Watchdog
Enhanced Capture Timer
> Reliable, robust operation
> Provides high performance using low-cost
reference crystals
> Reduces generated noise
> Reduces power consumption
> Easily able to implement real-time clock
> 8-channel, 16-bit with input capture, output
compare and pulse accumulator
> 16-bit modulus down counter
8-bit or 16-bit Pulse-Wide Modulation (PWM)
> Flexible, programmable timer system
> 8-channel, 8-bit or 4-channel, 16-bit PWM
> PWM supports center aligned operation
Two Serial Communications Interfaces
> Efficiently implement motor control, battery
charging or digital-to-analog functions
9S12DP256BDGV1 MC9S12DP256 Device Guide
S12DP256PIMV2
MC9S12DP256 Port Integration
Module Block Guide
S12BDMV4
HCS12 Background Debug (BDM)
Block Guide
S12BKVD1
HCS12 Breakpoint (BKP) Block Guide
S12CPUV2
HCS12 CPU Reference Manual
S12MSCANV2
HCS12 Motorola Scalable Controller
Area Network Block Guide
S12ATD10B8CV2
HCS12 10-bit 8-channel Analog to
Digital Block Guide
S12CRGV3
HCS12 Clock Reset Generator
Block Guide
S12ECT16B8CV1 HCS12 16-bit 8-channel Enhanced
Capture Timer Block Guide
S12EETS4KV2
HCS12 4K EEPROM Block Guide
S12FTS256KV2
HCS12 256K Flash Block Guide
S12IICV2
HCS12 I
2
C Block Guide
S12INTV1
HCS12 Interrupt (INT) Block Guide
S12MEBIV3
HCS12 Multiplexed External Bus
Interface (MEBI) Block Guide
S12MMCV4
HCS12 Module Mapping Control
(MMC) Block Guide
S12PWM8B8CV1
HCS12 8-bit 8-channel Pulse-Width
Modulator Block Guide
S12SCIV2
HCS12 Serial Communications
Interface Block Guide
S12SPIV2
HCS12 Serial Peripheral Interface
Block Guide
S12VREGV1
HCS12 Voltage Regulator
Block Guide
> 8192 prescaler option
> Asynchronous communication between the
MCU and a terminal, computer or a network
of MCUs
> Exact baud rate matching
Cost-Effective Development Tools
For more information on development tools, please refer to
the Freescale Development Tool Selector Guide (SG1011).
M68KIT912DP256
$495*
Evaluation kit for development and
evaluation of HCS12 application
code that includes the
M68EVB912DP256 and
USBMULTILINKBDM
HC08/HCS08/HC12/HCS12
stand-alone Flash programmer or
in-circuit emulator, debugger, Flash
programmer; USB, serial or Ethernet
interface options
Three Serial Peripheral Interfaces
> Up to 6.25 Mbps
> High-speed synchronous communication
between multiple MCUs or between MCU and
serial peripherals
> Provides a simple, efficient method of data
exchange between devices
> Minimizes the need for large numbers of
connections between devices and eliminates
the need for an address decoder
Inter IC (I
2
C) Bus
M68CYCLONEPRO
$499*
> 256 clock rate options
USBMULTILINKBDM
Universal HCS08/HCS12 in-circuit
$99*
emulator, debugger, and Flash
programmer; USB PC interface
CWX-H12-SE
Free*
CodeWarrior™ Special Edition for
HCS12 MCUs; includes integrated
development environment (IDE),
linker, debugger, unlimited
assembler, Processor Expert™
auto-code generator, full-chip
simulation and limited C compiler
Up to 91 Input/Output (I/O) Lines
> Programmable pull-ups/pull-downs
> Dual drive capability
> Reduce system cost
> Able to tailor application for minimum EMC or
high current loads
Application Notes and Engineering Bulletins
AN2206
AN2213
AN2216
AN2250
EB386
Security and Protection on the HCS12 Family
Using Cosmic Software’s M68HC12 Compiler for MC9S12DP256
MC9S12DP256 Software Development Using Metrowerks CodeWarrior™
Audio Reproduction on HCS12 Microcontrollers
HCS12 D-Family Compatibility
Package Options
Part Number
Package
Temp. Range
MC9S12DG256BCFU
MC9S12DG256BVFU
MC9S12DG256BMFU
MC9S12DG256BCPV
MC9S12DG256BVPV
MC9S12DG256BMPV
80-Lead QFP
80 QFP
80 QFP
80 QFP
112 LQFP
112 LQFP
112 LQFP
-40°C to +85°C
-40°C to +105°C
-40°C to +125°C
-40°C to +85°C
-40°C to +105°C
-40°C to +125°C
112-Lead LQFP
Learn More:
For more information about Freescale products, please visit
www.freescale.com.
*Price indicated is MSRP.
Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names
are the property of their respective owners. This product incorporates SuperFlash
®
technology licensed from SST.
© Freescale Semiconductor, Inc. 2005
Document Number: MC9S12DG256FS
REV 2
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