NXP USA Inc.

HCS12 HCS12 Microcontroller IC 16-Bit 25MHz 256KB (256K x 8) FLASH 80-QFP (14x14)

MC9S12DT256

Covers also

MC9S12A256, MC9S12DJ256

MC9S12DG256

Overview

The MC9S12DT256 microcontroller unit (MCU) is a 16-bit device composed of standard on-chip

peripherals including a 16-bit central processing unit (HCS12 CPU), 256K bytes of Flash EEPROM, 12K

bytes of RAM, 4K bytes of EEPROM, two asynchronous serial communications interfaces (SCI), three

serial peripheral interfaces (SPI), an 8-channel IC/OC enhanced capture timer, two 8-channel, 10-bit

analog-to-digital converters (ADC), an 8-channel pulse-width modulator (PWM), a digital Byte Data Link

Controller (BDLC), 29 discrete digital I/O channels (Port A, Port B, Port K and Port E), 20 discrete digital

I/O lines with interrupt and wakeup capability, three CAN 2.0 A, B software compatible modules

(MSCAN12), and an Inter-IC Bus. The MC9S12DT256 has full 16-bit data paths throughout. However,

the external bus can operate in an 8-bit narrow mode so single 8-bit wide memory can be interfaced for

lower cost systems. The inclusion of a PLL circuit allows power consumption and performance to be

adjusted to suit operational requirements.

Features

• HCS12 Core

– 16-bit HCS12 CPU

i. Upward compatible with M68HC11 instruction set

ii. Interrupt stacking and programmer’s model identical to M68HC11

iii.Instruction queue

iv. Enhanced indexed addressing

– MEBI (Multiplexed External Bus Interface)

– MMC (Module Mapping Control)

– INT (Interrupt control)

– BKP (Breakpoints)

– BDM (Background Debug Mode)

• CRG

– Low current Colpitts or Pierce oscillator

– PLL

– COP watchdog

– Real time interrupt

– Clock Monitor

• 8-bit and 4-bit ports with interrupt functionality

– Digital filtering

– Programmable rising or falling edge trigger

• Memory

– 256K Flash EEPROM

– 4K byte EEPROM

– 12K byte RAM

• Two 8-channel Analog-to-Digital Converters

– 10-bit resolution

– External conversion trigger capability

• Three 1M bit per second, CAN 2.0 A, B software compatible modules

– Five receive and three transmit buffers

– Flexible identifier filter programmable as 2 x 32 bit, 4 x 16 bit or 8 x 8 bit

– Four separate interrupt channels for Rx, Tx, error and wake-up

– Low-pass filter wake-up function

– Loop-back for self test operation

• Enhanced Capture Timer

– 16-bit main counter with 7-bit prescaler

– 8 programmable input capture or output compare channels

– Four 8-bit or two 16-bit pulse accumulators

• 8 PWM channels

– Programmable period and duty cycle

– 8-bit 8-channel or 16-bit 4-channel

– Separate control for each pulse width and duty cycle

– Center-aligned or left-aligned outputs

– Programmable clock select logic with a wide range of frequencies

– Fast emergency shutdown input

– Usable as interrupt inputs

• Serial interfaces

– Two asynchronous Serial Communications Interfaces (SCI)

– Three Synchronous Serial Peripheral Interface (SPI)

• Byte Data Link Controller (BDLC)

– SAE J1850 Class B Data Communications Network Interface Compatible and ISO Compatible

for Low-Speed (<125 Kbps) Serial Data Communications in Automotive Applications

• Inter-IC Bus (IIC)

– Compatible with I2C Bus standard

– Multi-master operation

– Software programmable for one of 256 different serial clock frequencies

• 112-Pin LQFP package

– I/O lines with 5V input and drive capability

– 5V A/D converter inputs

– Operation at 50MHz equivalent to 25MHz Bus Speed

– Development support

– Single-wire background debug™ mode (BDM)

– On-chip hardware breakpoints

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56800E 56F8xxx Microcontroller IC 16-Bit 60MHz 32KB (16K x 16) FLASH 64-LQFP (10x10)

Device Description

The 56F8323 and 56F8123 are members of the 56800E core-based family of controllers. Each combines,

on a single chip, the processing power of a Digital Signal Processor (DSP) and the functionality of a

microcontroller with a flexible set of peripherals to create an extremely cost-effective solution. Because

of their low cost, configuration flexibility, and compact program code, the 56F8323 and 56F8123 are

well-suited for many applications. The devices include many peripherals that are especially useful for

automotive control (56F8323 only); industrial control and networking; motion control; home appliances;

general purpose inverters; smart sensors; fire and security systems; power management; and medical

monitoring applications.

The 56800E core is based on a Harvard-style architecture consisting of three execution units operating in

parallel, allowing as many as six operations per instruction cycle. The MCU-style programming model

and optimized instruction set allow straightforward generation of efficient, compact DSP and control

code. The instruction set is also highly efficient for C Compilers to enable rapid development of

optimized control applications.

The 56F8323 and 56F8123 support program execution from internal memories. Two data operands can be

accessed from the on-chip data RAM per instruction cycle. These devices also provide one external

dedicated interrupt line and up to 27 General Purpose Input/Output (GPIO) lines, depending on peripheral

configuration.

56F8323 Features

The 56F8323 controller includes 32KB of Program Flash and 8KB of Data Flash, each programmable

through the JTAG port, with 4KB of Program RAM and 8KB of Data RAM. A total of 8KB of Boot Flash

is incorporated for easy customer inclusion of field-programmable software routines that can be used to

program the main Program and Data Flash memory areas. Both Program and Data Flash memories can be

independently bulk erased or erased in pages. Program Flash page erase size is 1KB. Boot and Data Flash

page erase size is 512 bytes. The Boot Flash memory can also be either bulk or page erased.

A key application-specific feature of the 56F8323 is the inclusion of one Pulse Width Modulator (PWM)

module. This module incorporates three complementary, individually programmable PWM signal output

pairs and is also capable of supporting six independent PWM functions to enhance motor control

functionality. Complementary operation permits programmable dead time insertion, distortion correction

via current sensing by software, and separate top and bottom output polarity control. The up-counter value

is programmable to support a continuously variable PWM frequency. Edge-aligned and center-aligned

synchronous pulse width control (0% to 100% modulation) is supported. The device is capable of

controlling most motor types: ACIM (AC Induction Motors); both BDC and BLDC (Brush and Brushless

DC motors); SRM and VRM (Switched and Variable Reluctance Motors); and stepper motors. The PWM

incorporates fault protection and cycle-by-cycle current limiting with sufficient output drive capability to

directly drive standard optoisolators. A “smoke-inhibit”, write-once protection feature for key parameters

is also included. A patented PWM waveform distortion correction circuit is also provided. Each PWM is

double-buffered and includes interrupt controls to permit integral reload rates to be programmable from

1/2 (center-aligned mode only) to 16. The PWM module provides reference outputs to synchronize the

Analog-to-Digital Converters (ADCs) through Quad Timer C, Channel 2.

The 56F8323 incorporates one Quadrature Decoder capable of capturing all four transitions on the

two-phase inputs, permitting generation of a number proportional to actual position. Speed computation

capabilities accommodate both fast- and slow-moving shafts. An integrated watchdog timer in the

Quadrature Decoder can be programmed with a time-out value to alarm when no shaft motion is detected.

Each input is filtered to ensure only true transitions are recorded.

This controller also provides a full set of standard programmable peripherals that include two Serial

Communications Interfaces (SCIs), two Serial Peripheral Interfaces (SPIs), two Quad Timers, and

FlexCAN. Any of these interfaces can be used as General Purpose Input/Outputs (GPIOs) if that function

is not required. A Flex Controller Area Network (FlexCAN) interface (CAN Version 2.0 B-compliant) and

an internal interrupt controller are also a part of the 56F8323.

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