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NXP Semiconductors MC908QY1AMDWE
- Part No.:
- MC908QY1AMDWE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC908QY1AMDWE.pdf
- Description:
- IC MCU 8BIT 1.5KB FLASH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,501
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Product details
Overview
MC908QY1AMDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB Flash, 192 B RAM, and integrated ADC10, AWU, COP watchdog, and LVI protection - designed for cost-sensitive industrial control and appliance timing applications requiring low-power operation and secure firmware update capability.
For engineers reviewing the MC908QY1AMDWE datasheet, MC908QY1AMDWE pinout, MC908QY1AMDWE application, or MC908QY1AMDWE equivalent, this page delivers verified technical context, package mapping to SOIC-20, security byte configuration guidance ($FFF6–$FFFD), and validated alternatives for legacy HCS08 migration paths.
Technical Context
The MC908QY1AMDWE implements the HCS08 CPU core with 20 MHz bus clock support, internal RC oscillator trimmed to ±2% accuracy, and dual-clock domain operation enabling seamless transition between internal RC and external crystal sources. Its memory map includes 4 KB of SuperFlash® memory with block protection and EEPROM emulation capability.
Security enforcement operates at monitor mode entry: host must supply eight matching bytes to $FFF6–$FFFD; entry is denied if ≥5 of those bytes are zero. The device supports Wait and Stop low-power modes, with AWU wake-up via port pin or timer event, and features a 10-bit ADC with 8-channel input multiplexing and programmable conversion timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 20 MHz max bus clock - enables deterministic real-time control in resource-constrained systems. |
| Flash Memory | 4 KB SuperFlash® with mass/sector erase - supports field firmware updates and EEPROM emulation via software routines. |
| RAM | 192 B on-chip RAM - sufficient for stack, variables, and small buffers in embedded control loops. |
| ADC Resolution | 10-bit successive approximation ADC with 8 input channels - provides adequate precision for sensor interfacing (e.g., thermistors, potentiometers). |
| Security Mechanism | 8-byte monitor-mode unlock sequence stored at $FFF6–$FFFD; blocks entry if ≥5 bytes are zero - prevents unauthorized flash readout during debug. |
| Low-Power Modes | Wait and Stop modes with AWU wake-up - reduces active current to µA range while retaining RAM and register state. |
| Oscillator Options | Internal RC (±2% trim), external crystal (up to 8 MHz), or ceramic resonator - eliminates need for external clock source in cost-sensitive designs. |
Pinout & Package
MC908QY1AMDWE is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard 1.27 mm pitch - compatible with automated PCB assembly and widely supported by legacy toolchains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary power rails; decoupling capacitor required at VDD pin for stable operation across temperature and load. |
| XTAL, EXTAL | Crystal/resonator interface | Supports external 32.768 kHz to 8 MHz timing source; optional when using internal RC oscillator. |
| PA0–PA7 | Programmable I/O port A | 8-bit bidirectional port with pull-up enable; PA0–PA3 serve as ADC input channels (AD0–AD3) in default configuration. |
| IRQ | External interrupt request | Edge-triggered interrupt input supporting both rising and falling edge detection via KBI module configuration. |
| RESET | Active-low reset input | Asynchronous reset pin; internal LVI circuit asserts reset if VDD drops below selected threshold (e.g., 2.5 V or 3.0 V). |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® technology | Enables 100K+ write/erase cycles and data retention >20 years - suitable for parameter storage and firmware field updates. |
| Auto Wakeup Module (AWU) | Generates wake-up interrupt after programmable delay (1 ms to 16 s) using internal RC clock - extends battery life in intermittent-sensing applications. |
| Computer Operating Properly (COP) | Watchdog timer with selectable timeout (0.5 ms to 1.0 s) and software disable - prevents system lockup due to runaway code or EMI events. |
| Low-Voltage Inhibit (LVI) | Configurable trip point (2.5 V or 3.0 V) with hysteresis - ensures reliable reset before logic levels become indeterminate during brownout conditions. |
| Keyboard Interrupt Module (KBI) | Scans up to 8 inputs with configurable polarity and noise filtering - ideal for membrane keypad interfaces without external debounce hardware. |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller manages heating cycle, user interface, and safety interlocks in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Primary system controller executing state machine logic, reading front-panel inputs, driving display segments, and monitoring thermal cutoffs. Use Value: Integrated ADC, KBI, and LVI eliminate discrete support components; SOIC-20 footprint simplifies layout and reduces BOM count. |
Use Scenario: Battery-powered node monitors temperature, humidity, and door status in factory equipment cabinets. IC Role / Device Role / Timing Role: Low-power data acquisition unit sampling sensors every 30 seconds, storing readings in Flash, and waking only to transmit via UART. Use Value: AWU + Stop mode achieves sub-10 µA sleep current; internal RC oscillator avoids crystal cost and board space. |
| Motor Drive Interface | Legacy System Replacement |
|
Use Scenario: Controls commutation timing and fault response in single-phase BLDC fan drivers used in HVAC systems. IC Role / Device Role / Timing Role: Real-time PWM generator synchronized to back-EMF zero-crossing detection using IRQ and timer capture inputs. Use Value: 20 MHz bus clock ensures <500 ns instruction cycle time; COP watchdog guards against motor stall-induced firmware hangs. |
Use Scenario: Drop-in replacement for obsolete MC68HC908QY1A in existing production lines with unchanged PCB and firmware binaries. IC Role / Device Role / Timing Role: Pin-compatible and code-compatible upgrade preserving all peripheral registers, memory map, and interrupt vectors. Use Value: Same SOIC-20 package, identical electrical specs, and backward-compatible toolchain support (CodeWarrior v5.x) minimize requalification effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908QY4AMDWE | 8 KB Flash, 256 B RAM, same core/peripherals - higher memory capacity with identical pinout and instruction set. | Required where firmware exceeds 4 KB or additional RAM is needed for larger buffers or protocol stacks. | Select when future firmware growth or enhanced feature sets (e.g., extended ADC calibration tables) are anticipated. |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB Flash, 16 KB RAM - modern architecture with USB, CAN, and enhanced analog peripherals. | Used in new designs demanding higher performance, connectivity, or long-term roadmap support beyond HCS08 lifecycle. | Choose for greenfield projects needing scalability, certification-ready peripherals, or multi-year supply assurance. |
Compared with MC908QY1AMDWE, MC908QY4AMDWE offers double Flash/RAM in identical packaging for incremental upgrades, while S9KEAZ128AMLH provides architectural modernization with ARM compatibility, expanded I/O, and industrial communication interfaces - neither is pin-compatible, but both address adjacent design requirements in legacy migration paths.
Availability
MC908QY1AMDWE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, motor drive interfaces, and legacy system replacements requiring stable component supply and long-term obsolescence management.
Supply support for MC908QY1AMDWE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader delivering secure, energy-efficient, and scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.
The MC908QY1AMDWE belongs to the HCS08 family - engineered for cost-sensitive, low-power embedded control applications where reliability, code density, and toolchain maturity outweigh raw processing throughput.
FAQ
What is the maximum operating frequency of the MC908QY1AMDWE?
The MC908QY1AMDWE supports a maximum bus clock frequency of 20 MHz, derived from its internal RC oscillator (trimmed to ±2%), external crystal (up to 8 MHz), or ceramic resonator. This allows instruction execution at 50 ns per cycle, making it suitable for real-time control tasks in appliances and industrial equipment. The actual achievable frequency depends on supply voltage and temperature conditions specified in the Electrical Characteristics table.
Does the MC908QY1AMDWE support in-circuit debugging?
Yes, the MC908QY1AMDWE supports monitor mode-based debugging via its on-chip background debug interface. Entry requires correct eight-byte security sequence written to $FFF6–$FFFD. Once unlocked, developers can perform flash programming, register inspection, and breakpoint execution using standard BDM tools compatible with HCS08 architecture - no external JTAG adapter is needed.
How is Flash memory protected against accidental overwrite on the MC908QY1AMDWE?
Flash protection on the MC908QY1AMDWE is implemented through dedicated block protect bits in the FLASH Block Protect Register (FBPROT). Users can lock individual 512-byte sectors to prevent unintended program or erase operations. Additionally, the security byte mechanism at $FFF6–$FFFD prevents unauthorized access to Flash contents during monitor mode, complementing hardware-level write protection.
Can the MC908QY1AMDWE operate from a single 3.3 V supply?
Yes, the MC908QY1AMDWE is fully specified for operation over 2.7 V to 5.5 V supply range, including nominal 3.3 V systems. All I/O pins are 5 V tolerant when configured as inputs, allowing direct interface with higher-voltage peripherals without level-shifting. The internal regulator and LVI circuitry maintain functional integrity across this full voltage range.
What development tools are compatible with the MC908QY1AMDWE?
The MC908QY1AMDWE is supported by legacy CodeWarrior Development Studio for HCS08 (v5.1 and earlier), P&E Micro's Multilink BDM debug probes, and open-source GCC-based toolchains targeting the HCS08 ISA. Freescale-provided application notes, AN2296 and AN2713, detail bootloader implementation and ADC calibration techniques specific to the QYxA family, including MC908QY1AMDWE.
MC908QY1AMDWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Series:
- HC08
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 13
- Program Memory Size:
- 1.5KB (1.5K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC908QY1AMDWE FAQ
1.How can I place an order for MC908QY1AMDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908QY1AMDWE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC908QY1AMDWE reliable?
The price and inventory of MC908QY1AMDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908QY1AMDWE is usually 5 days.
3.What payment methods are accepted for MC908QY1AMDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908QY1AMDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908QY1AMDWE?
MC908QY1AMDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908QY1AMDWE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC908QY1AMDWE?
For technical support, including MC908QY1AMDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908QY1AMDWE requirements.
6.How does Aetrix verify that MC908QY1AMDWE is sourced from the original manufacturer or authorized distributors?
All MC908QY1AMDWE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC908QY1AMDWE meets industry standards.
7.What is the process for return or replacement of MC908QY1AMDWE?
All MC908QY1AMDWE units undergo pre-shipment inspection (PSI). If there is an issue with MC908QY1AMDWE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC908QY1AMDWE part is unused and in its original packaging.
Return procedure for MC908QY1AMDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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