MC9S12XD256VAG

Product Overview

• Category: Microcontroller
• Use: Embedded systems, automotive applications
• Characteristics:
  • High-performance 16-bit microcontroller
  • Integrated peripherals for automotive applications
  • Flash memory for program storage
  • RAM for data storage
• Package: 112-pin LQFP (Low Profile Quad Flat Package)
• Essence: A powerful microcontroller designed for automotive applications
• Packaging/Quantity: Available in reels of 250 units

Specifications

• Architecture: 16-bit
• CPU Speed: Up to 25 MHz
• Program Memory Size: 256 KB
• Data RAM Size: 8 KB
• Operating Voltage Range: 2.35V to 5.5V
• Temperature Range: -40°C to +125°C
• Number of I/O Pins: 89
• Communication Interfaces: CAN, SPI, SCI, I2C
• Analog-to-Digital Converter (ADC): 10-bit, 8 channels
• Timer Modules: 16-bit timers, PWM capabilities
• Watchdog Timer: Yes
• Interrupt Sources: Multiple sources with prioritization

Detailed Pin Configuration

The MC9S12XD256VAG microcontroller has a total of 112 pins. The pin configuration is as follows:

• Pins 1-4: Oscillator and clock input/output
• Pins 5-8: Ground (GND)
• Pins 9-16: General-purpose I/O (GPIO) pins
• Pins 17-20: Power supply (VDD)
• Pins 21-24: Reset and system control signals
• Pins 25-32: GPIO pins
• Pins 33-36: Analog input pins
• Pins 37-44: GPIO pins
• Pins 45-48: Serial communication interface (SCI) pins
• Pins 49-52: GPIO pins
• Pins 53-56: Serial peripheral interface (SPI) pins
• Pins 57-60: GPIO pins
• Pins 61-64: Inter-integrated circuit (I2C) pins
• Pins 65-68: GPIO pins
• Pins 69-72: Controller area network (CAN) pins
• Pins 73-76: GPIO pins
• Pins 77-80: Timer input/output pins
• Pins 81-84: GPIO pins
• Pins 85-88: PWM output pins
• Pins 89-92: GPIO pins
• Pins 93-96: External interrupt pins
• Pins 97-100: GPIO pins
• Pins 101-104: Analog ground (AGND)
• Pins 105-108: Power supply (VDD)
• Pins 109-112: Ground (GND)

Functional Features

The MC9S12XD256VAG microcontroller offers several functional features, including:

1. High-performance CPU: The 16-bit CPU allows for efficient execution of instructions and handling of data.
2. Integrated Peripherals: The microcontroller includes various peripherals such as CAN, SPI, SCI, and I2C interfaces, enabling seamless communication with other devices.
3. Flash Memory: The built-in flash memory provides ample storage space for program code, allowing for easy firmware updates.
4. RAM: The on-chip RAM enables temporary data storage during program execution.
5. Analog-to-Digital Converter: The integrated ADC allows for precise analog signal measurements.
6. Timer Modules: The timer modules facilitate accurate timing and pulse width modulation (PWM) generation.
7. Watchdog Timer: The watchdog timer ensures system reliability by monitoring and resetting the microcontroller if necessary.
8. Interrupt Sources: Multiple interrupt sources with prioritization enable efficient handling of external events.

Advantages and Disadvantages

Advantages: - High-performance CPU for efficient processing - Integrated peripherals simplify system design - Ample program memory and data storage - Wide operating voltage range allows for flexibility in power supply - Suitable for automotive applications due to its robustness and temperature range

Disadvantages: - Limited pin count may restrict the number of external devices that can be connected directly - 16-bit architecture may not be suitable for certain complex applications requiring higher precision or larger data sizes

Working Principles

The MC9S12XD256VAG microcontroller operates based on the Von Neumann architecture. It executes instructions fetched from the flash memory using the central processing unit (CPU). The integrated peripherals enable communication with external devices, while the RAM provides temporary data storage during program execution. The microcontroller's working principles involve executing instructions, interacting with peripherals, and responding to external events through interrupts.

Detailed Application Field Plans

The MC9S12XD256VAG microcontroller finds extensive use in various automotive applications, including:

1. Engine Control Units (ECUs): The microcontroller can be