MC68HC908QY4CDT Features, Pinout, Applications, and Datasheet
Update Time: Jan 10, 2025 Readership: 108
Contents
The MC68HC908QY4 is part of the M68HC08 family of cost-effective, high-performance 8-bit microcontroller units (MCUs). This family utilizes a Complex Instruction Set Computer (CISC) architecture with a Von Neumann design. All MCUs in the M68HC08 series feature the advanced M68HC08 central processor unit (CPU08) and come in a range of configurations, offering various modules, memory capacities, and package options.
The MC68HC908QY4CDT is an 8-bit microcontroller from NXP Semiconductors based on the HC08 core architecture. This versatile MCU integrates essential peripherals, memory, and I/O capabilities, making it suitable for compact and cost-sensitive embedded applications. Housed in a 16-pin TSSOP (Thin Shrink Small Outline Package), the MC68HC908QY4CDT is an efficient choice for applications requiring low power, small size, and robust processing capabilities.
Overview of MC68HC908QY4CDT
The MC68HC908QT4 is a variant of the MC68HC908QY4, part of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). This MCU is based on the Complex Instruction Set Computer (CISC) architecture with a Von Neumann design. It utilizes the enhanced M68HC08 central processor unit (CPU08) and offers a range of configurations, including various memory sizes and package types. The MC68HC908QT4 is ideal for applications that require efficient processing power, low power consumption, and flexibility in design, making it suitable for a wide variety of embedded systems.
The MC68HC908QY4CDT is designed for general-purpose control applications, offering 4KB of flash memory and 128 bytes of RAM. It integrates a versatile I/O structure, serial communication support, and a timer module for enhanced functionality. The MCU operates within a wide supply voltage range, ensuring flexibility for various designs, including automotive, industrial, and consumer electronics.
MC68HC908QY4CDT Pinout
Pin Configuration
| Pin Number | Name | Description | Function |
|---|---|---|---|
| 1 | PTA0/IRQ | Port A I/O or External Interrupt Input | GPIO or external interrupt |
| 2 | PTA1 | Port A I/O | GPIO |
| 3 | PTA2 | Port A I/O | GPIO |
| 4 | PTA3 | Port A I/O | GPIO |
| 5 | PTA4/OSC1 | Port A I/O or Oscillator Input | GPIO or clock input |
| 6 | PTA5/OSC2 | Port A I/O or Oscillator Output | GPIO or clock output |
| 7 | PTB0 | Port B I/O | GPIO |
| 8 | PTB1 | Port B I/O | GPIO |
| 9 | PTB2/AD0 | Port B I/O or ADC Channel 0 | GPIO or analog input |
| 10 | PTB3/AD1 | Port B I/O or ADC Channel 1 | GPIO or analog input |
| 11 | PTB4/AD2 | Port B I/O or ADC Channel 2 | GPIO or analog input |
| 12 | PTB5/AD3 | Port B I/O or ADC Channel 3 | GPIO or analog input |
| 13 | VSS | Ground | Ground reference |
| 14 | VDD | Power Supply | Power supply input |
| 15 | PTB6/TXD | Port B I/O or UART Transmit | GPIO or serial data output |
| 16 | PTB7/RXD | Port B I/O or UART Receive | GPIO or serial data input |
MC68HC908QY4CDT Features
- High-performance M68HC08 CPU core
- Fully upward-compatible object code with M68HC05 Family
- 5-V and 3-V operating voltages (VDD)
- 8-MHz internal bus operation at 5 V, 4-MHz at 3 V
- Trimmable internal oscillator:
- 3.2 MHz internal bus operation
- The 8-bit trim capability allows 0.4% accuracy
- ±25% untrimmed
- Auto wakeup from STOP capability
- Configuration (CONFIG) register for MCU configuration options, including:
- Low-voltage inhibit (LVI) trip point
- In-system FLASH programming
- FLASH security
- On-chip in-application programmable FLASH memory:
- 4096 bytes
- 128 bytes of on-chip random-access memory (RAM)
- 2-channel, 16-bit timer interface module (TIM)
- 4-channel, 8-bit analog-to-digital converter (ADC) on MC68HC908QY4
- 5 or 13 bidirectional input/output (I/O) lines and one input-only:
- Six shared with keyboard interrupt function and ADC
- Two shared with timer channels
- One shared with external interrupt (IRQ)
- Eight extra I/O lines on a 16-pin package only
- High current sink/source capability on all port pins
- Selectable pull-ups on all ports, selectable on an individual bit basis
- Three-state ability on all port pins
- 6-bit keyboard interrupt with wakeup feature (KBI)
- Low-voltage inhibit (LVI) module features:
- Software selectable trip point in CONFIG register
- System protection features:
- Computer operating properly (COP) watchdog
- Low-voltage detection with reset
- Illegal opcode detection with reset
- Illegal address detection with reset
- External asynchronous interrupt pin with internal pullup (IRQ) shared with general-purpose input pin
- Master asynchronous reset pin (RST) shared with general-purpose I/O pin
- Power-on reset
- Internal pull-ups on IRQ and RST to reduce external components
- Memory-mapped I/O registers
- Power-saving stop and wait modes
- Available packages:16-pin thin shrink small outline package (TSSOP)
Features of the CPU08
- Enhanced HC05 programming model
- Extensive loop control functions
- 16 addressing modes
- 16-bit index register and stack pointer
- Memory-to-memory data transfers
- Fast 8 × 8 multiply instruction
- Fast 16/8 divide instruction
- Binary-coded decimal (BCD) instructions
- Optimization for controller applications
- Efficient C language support
MC68HC908QY4CDT Specifications
| Attribute | Description |
|---|---|
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Connectivity | None |
| Peripherals | LVD, POR, PWM |
| Number of I/O | 13 |
| Program Memory Size | 4 KB (4K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | None |
| RAM Size | 128 x 8 bytes |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | A/D 4x8b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Supplier Device Package | 16-TSSOP |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
Absolute Maximum Ratings
How Does MC68HC908QY4CDT Work
The MC68HC908QY4CDT operates as a versatile microcontroller designed for embedded applications, integrating a high-performance M68HC08 CPU core with memory and I/O capabilities. It functions by executing instructions from its on-chip flash memory, providing both program and data storage. The microcontroller operates using a trimmable internal oscillator, with clock frequencies adjusted based on voltage levels (5V and 3V).
The core interacts with various peripherals through a set of built-in I/O ports and communication interfaces, such as a 16-bit timer, analog-to-digital converter (ADC), and keyboard interrupt functions. The CPU processes instructions in a highly efficient manner, leveraging 16 addressing modes and supporting fast multiply and divide operations. Additionally, the system can enter low-power modes, including stop and wait, to conserve energy when not in active use.
To ensure reliability, the MC68HC908QY4CDT includes built-in system protection features like the Computer Operating Properly (COP) watchdog, illegal opcode detection, and low-voltage detection, triggering resets when necessary. It also supports in-system programming, allowing firmware updates without needing to remove the microcontroller.
By combining these features, the MC68HC908QY4CDT enables precise control over various embedded systems while maintaining low power consumption, making it ideal for automotive, industrial, and consumer electronics applications.
MC68HC908QY4CDT Applications
- Consumer electronics: For controlling electronic devices such as home appliances, remote controls, and toys.
- Automotive systems: Used in automotive control systems, such as power windows, lights, and climate control modules.
- Industrial automation: Integrated systems for controlling machinery, sensors, and communication between industrial devices.
- Battery-powered applications: Its low-power modes make it ideal for battery-powered systems such as portable devices and remote sensors.
- Consumer health monitoring: Used in medical equipment for low-energy data acquisition and device control.
- Data acquisition systems: Suitable for systems that require ADCs and timer interfaces to monitor and control analog signals.
- Communication devices: Employed in simple communication modules where low voltage and small footprint are required.
Advantages and Disadvantages
MC68HC908QY4CDT Advantages
- Integrated Peripherals: Reduces external component requirements.
- Low Power Operation: Ideal for battery-operated devices.
- Small Form Factor: Compact TSSOP package saves PCB space.
- Wide Operating Voltage Range: Compatible with various power sources.
- Reprogrammable Memory: Flash memory allows for firmware updates.
MC68HC908QY4CDT Disadvantages
- Limited RAM: 128 bytes of RAM may restrict memory-intensive applications.
- Low Processing Power: 8-bit architecture is not suitable for advanced computational tasks.
MC68HC908QY4CDT Equivalents/Alternatives
| Part Number | Description |
|---|---|
| MC68HC908QY4CDTE | A variant of the MC68HC908QY4CDT with similar features and functionality. |
| MC68HC908AZ60AVFU | A microcontroller from the M68HC08 family, offering similar capabilities in embedded applications. |
| MC9S12A256CPVENXP | A microcontroller from the MC9S12 family, offering enhanced features and higher processing capabilities for automotive and industrial use. |
| MK6OFN1MOVLQ12 | A microcontroller from the MK6 series, suitable for automotive and industrial applications. |
| MKL25Z128VLK4 | A microcontroller from the Kinetis L series, featuring low-power capabilities and designed for embedded systems. |
MC68HC908QY4CDT Package
The 16-TSSOP (Thin Shrink Small Outline Package) is a compact surface-mount package, that providing:
- Space Efficiency: Supports high-density PCB layouts.
- Ease of Assembly: Ideal for automated SMT assembly processes.
- Thermal Performance: Ensures reliable operation in demanding environments.
MC68HC908QY4CDT Manufacturer
NXP Semiconductors is a global leader in secure connectivity solutions, offering a broad range of microcontrollers, analog products, and wireless communication solutions. The MC68HC908QY4CDT is a testament to NXP's expertise in creating reliable, energy-efficient embedded solutions for a variety of applications.
MC68HC908QY4CDT Datasheet
The datasheet includes detailed specifications, electrical characteristics, and pin configurations. It also provides functional descriptions of integrated peripherals, application guidelines, and timing diagrams. Design recommendations, such as PCB layout considerations and memory allocation, ensure optimal performance across diverse applications.
MC68HC908QY4CDT vs. PIC16F877A
| Feature | MC68HC908QY4CDT | PIC16F877A |
|---|---|---|
| Core | M68HC08 CPU core | PIC16 core |
| Clock Speed | 8 MHz (5V), 4 MHz (3V) | 20 MHz |
| Flash Memory | 4096 bytes | 14 KB |
| RAM | 128 bytes | 368 bytes |
| I/O Pins | 5 to 13 I/O lines | 33 I/O pins |
| Timers | 2-channel, 16-bit timer | 3 timers (8-bit or 16-bit) |
| ADC Channels | 4-channel, 8-bit ADC | 8-channel, 10-bit ADC |
| Power Modes | Stop and Wait modes | Sleep and Power-down modes |
| Package Options | 16-pin TSSOP | 40-pin PDIP, SOIC |
MC68HC908QY4CDT vs. ATmega328P
| Feature | MC68HC908QY4CDT | ATmega328P |
|---|---|---|
| Core | M68HC08 CPU core | AVR architecture |
| Clock Speed | 8 MHz (5V), 4 MHz (3V) | 20 MHz |
| Flash Memory | 4096 bytes | 32 KB |
| RAM | 128 bytes | 2 KB |
| I/O Pins | 5 to 13 I/O lines | 23 I/O pins |
| Timers | 2-channel, 16-bit timer | 3 timers (8-bit or 16-bit) |
| ADC Channels | 4-channel, 8-bit ADC | 6-channel, 10-bit ADC |
| Power Modes | Stop and Wait modes | Power-down, Standby, and Sleep modes |
| Package Options | 16-pin TSSOP | 28-pin PDIP, TQFP, MLF |
MC68HC908QY4CDT vs. 8051 Microcontroller
| Feature | MC68HC908QY4CDT | 8051 Microcontroller |
|---|---|---|
| Core | M68HC08 CPU core | 8051 architecture |
| Clock Speed | 8 MHz (5V), 4 MHz (3V) | 12 MHz |
| Flash Memory | 4096 bytes | Varies (typically 4-64 KB) |
| RAM | 128 bytes | 128 bytes |
| I/O Pins | 5 to 13 I/O lines | 32 I/O pins |
| Timers | 2-channel, 16-bit timer | 2 timers (8-bit) |
| ADC Channels | 4-channel, 8-bit ADC | Typically none (depends on specific variant) |
| Power Modes | Stop and Wait modes | Idle and Power-down modes |
| Package Options | 16-pin TSSOP | 20-pin PDIP, 40-pin DIP |
Conclusion
The MC68HC908QY4CDT is a robust and versatile 8-bit microcontroller offering a combination of compact size, low power consumption, and integrated peripherals. Its wide voltage range, 4KB flash memory, and 13 I/O pins make it an excellent choice for consumer, automotive, and industrial applications.
Extended Reading
FAQ
-
What is the clock speed of the MC68HC908QY4CDT?
The MC68HC908QY4CDT operates at 8 MHz with a 5V supply voltage and 4 MHz with a 3V supply voltage.
-
What is the memory capacity of the MC68HC908QY4CDT?
The microcontroller features 4 KB of Flash memory for program storage and 128 bytes of RAM for data storage.
-
Does the MC68HC908QY4CDT have ADC functionality?
Yes, the MC68HC908QY4CDT includes a 4-channel, 8-bit analog-to-digital converter (ADC).
-
What are the power-saving features of the MC68HC908QY4CDT?
The MC68HC908QY4CDT supports Stop-and-wait power-saving modes to reduce power consumption during idle states.
-
Can the MC68HC908QY4CDT be programmed in-circuit?
Yes, the MC68HC908QY4CDT supports in-system programming, allowing firmware updates without needing to remove the microcontroller from the circuit.
MC68HC908QY4CDT In Stock: 6,511 Pcs
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