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NXP Semiconductors MC68HC908GP32CP
- Part No.:
- MC68HC908GP32CP
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
MC68HC908GP32CP.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
MC68HC908GP32CP from NXP (formerly Motorola) is an 8-bit HCS08-core microcontroller with 32 KB on-chip FLASH, 1 KB RAM, and integrated peripherals including 8-channel 10-bit ADC, SCI, SPI, two timer modules (TIM1/TIM2), and a PLL-based clock generator. It operates at up to 8 MHz bus frequency and supports low-power wait/stop modes for battery-powered industrial controls and sensor interfaces.
For engineers reviewing the MC68HC908GP32CP datasheet, MC68HC908GP32CP pinout, MC68HC908GP32CP application, or MC68HC908GP32CP equivalent, key selection criteria include its 44-pin QFP package, 5 V operation, FLASH programmability in-system, COP watchdog, and LVI reset protection - all critical for cost-sensitive embedded control designs requiring field firmware updates and robust power management.
Technical Context
The MC68HC908GP32CP implements the HCS08 CPU core with enhanced addressing modes and a 16-bit index register. Its Clock Generator Module (CGMC) integrates a crystal oscillator, PLL, and base clock selector to generate stable system clocks from 1–8 MHz crystals or external sources, supporting dynamic frequency scaling for power optimization.
Peripheral integration includes dual 16-bit timer modules (TIM1 with input capture/output compare and TIM2 with pulse-width modulation), a 10-bit ADC with configurable sample time and conversion trigger sources, and serial interfaces (SCI and SPI) with independent baud rate generators and interrupt-driven operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit index register and enhanced instruction set for compact code size and deterministic timing. |
| FLASH Memory | 32 KB on-chip FLASH with page erase (512 B), mass erase, and block protection - enables in-field firmware updates without external programming hardware. |
| RAM Size | 1 KB on-chip RAM for stack, variables, and data buffers; retains content in wait mode but not stop mode. |
| ADC Resolution | 10-bit successive-approximation ADC with 8 input channels, software-selectable conversion time (8–32 bus cycles), and internal reference option. |
| Timer Modules | TIM1: 16-bit input capture/output compare; TIM2: 16-bit PWM with center-aligned mode - supports motor control and precise timing tasks. |
| Supply Voltage | 4.5 V to 5.5 V operation - compatible with standard 5 V logic systems and industrial power rails. |
| Operating Frequency | Up to 8 MHz bus frequency via PLL multiplication (e.g., 3.6864 MHz crystal × 2.17 → 8 MHz); supports crystal or external clock input. |
Pinout & Package
MC68HC908GP32CP is housed in a 44-pin Plastic Quad Flat Package (QFP), case 824A, with 0.8 mm lead pitch and 10 mm × 10 mm body size. Pin assignments follow Motorola's standardized HCS08 GP-series layout, supporting mixed-signal I/O with dedicated analog supply pins (VDDAD/VSSAD) and separate PLL analog supply (VDDA/VSSA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Main digital power (5 V) and return; decoupling required within 10 mm of pins for noise immunity. |
| OSC1, OSC2 | Crystal oscillator inputs | Connects to parallel-resonant quartz crystal (1–8 MHz); internal load capacitors eliminate need for external caps in basic configurations. |
| RST | Active-low reset input | Asynchronous reset assertion halts CPU and initializes registers; pulled high externally for normal operation. |
| PTA0–PTA7 / KBD0–KBD7 | Port A I/O with keyboard interrupt | 8-bit bidirectional port with configurable pull-ups and KBI interrupt capability for keypad scanning. |
| PTB0–PTB7 / AD0–AD7 | Port B I/O with ADC inputs | 8-bit port where lower 4 bits (PTB0–PTB3) serve as ADC analog inputs; shared digital/analog function requires careful routing. |
| PTC0–PTC6 | Port C general-purpose I/O | 7-bit port with no peripheral multiplexing - ideal for GPIO expansion or status signaling. |
| PTD0–PTD7 / SS, T2CH1, etc. | Port D with SPI/Timer functions | Includes SPI slave select (PTD0/SS), TIM2 channel 1 (PTD7/T2CH1), and other peripheral signals - requires mode configuration via SIM registers. |
| PTE0/TxD, PTE1/RxD | SCI serial interface | Dedicated UART TX/RX pins supporting asynchronous communication up to 115.2 kbps at 8 MHz bus clock. |
Key Features
| Feature | Design Value |
|---|---|
| Computer Operating Properly (COP) watchdog | Configurable timeout (0.5 ms to 1.0 s) with windowed enable/disable - prevents runaway code in safety-critical control loops. |
| Low-Voltage Inhibit (LVI) | Programmable trip point (4.25 V or 4.0 V) with hysteresis - triggers reset before supply collapse corrupts FLASH or RAM. |
| In-system programmable FLASH | Supports reprogramming via SCI bootloader or MON monitor ROM - eliminates need for external programmers in production and field service. |
| Two independent timer modules | TIM1 handles input capture for encoder counting; TIM2 generates complementary PWM for half-bridge drivers - both operate in wait mode. |
| Integrated PLL clock generator | Enables precise 8 MHz bus clock from low-cost 3.6864 MHz crystal - reduces EMI vs. higher-frequency oscillators and improves jitter tolerance. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers using hall-effect feedback. IC Role / Device Role / Timing Role: Real-time PWM generation (TIM2), ADC sampling of current/voltage, and SCI telemetry reporting. Use Value: Integrated 10-bit ADC and dual timers eliminate external signal conditioning and timing ICs, reducing BOM count by 3 components. |
Use Scenario: Battery-powered temperature/humidity sensor with local data logging and RS-485 output. IC Role / Device Role / Timing Role: ADC acquisition, FLASH-based data buffering, low-power stop-mode wake-up on timer or external interrupt. Use Value: 1 KB RAM + 32 KB FLASH enables 24-hour buffered logging at 1 Hz; LVI ensures clean reset during brownout. |
| Appliance User Interface | Legacy System Upgrade |
Use Scenario: Keypad and LED display control in microwave oven control panel. IC Role / Device Role / Timing Role: Keyboard interrupt scanning (KBI), GPIO-driven LED multiplexing, and buzzer tone generation via TIM1 output compare. Use Value: Dedicated KBI module reduces CPU overhead to <5% per scan cycle versus bit-banged polling. |
Use Scenario: Drop-in replacement for obsolete MC68HC11E9 in industrial PLC I/O module. IC Role / Device Role / Timing Role: Pin-compatible upgrade path with identical 44-pin QFP footprint and 5 V operation. Use Value: Same peripheral register map and interrupt vector table allow reuse of legacy assembly code with minimal linker adjustments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA8CP | RS08 core, 8 KB FLASH, 1 KB RAM, no PLL; 20 MHz max bus clock via internal oscillator only. | Lacks crystal oscillator and PLL - unsuitable for applications requiring precise timing or external crystal sync. | Select when cost and code size are primary constraints and crystal-based timing is unnecessary. |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB FLASH, 16 KB RAM, 48 MHz max, integrated USB and CAN. | 32-bit architecture, higher performance, and advanced peripherals - overqualified for simple 8-bit control tasks. | Choose for future-proofing or when CAN/USB connectivity is required alongside legacy I/O compatibility. |
Compared with MC9RS08KA8CP, the MC68HC908GP32CP provides superior timing precision via PLL and crystal support; compared with S9KEAZ128AMLH, it offers lower power consumption in stop mode (1 µA vs. 3 µA) and simpler toolchain requirements for legacy code migration.
Availability
MC68HC908GP32CP is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, appliance user interfaces, and legacy system upgrades requiring stable component supply and long-term manufacturing continuity.
Supply support for MC68HC908GP32CP 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Motorola's semiconductor division.
The MC68HC908GP32CP belongs to the HCS08 microcontroller family, designed specifically for cost-sensitive, low-power embedded control applications requiring high integration, field-upgradable FLASH, and robust real-time peripheral support.
FAQ
What is the maximum operating frequency of the MC68HC908GP32CP?
The MC68HC908GP32CP supports a maximum bus frequency of 8 MHz, achieved via its integrated PLL clock generator. This allows use of low-cost, low-frequency crystals (e.g., 3.6864 MHz) while delivering sufficient throughput for real-time control tasks. The PLL lock time is specified at ≤10 ms under typical conditions, and the CGM module includes bandwidth control registers to optimize stability across temperature and voltage variations. The MC68HC908GP32CP does not support external clock sources above 8 MHz without violating AC timing specifications.
Does the MC68HC908GP32CP support in-system programming (ISP)?
Yes, the MC68HC908GP32CP supports full in-system programming via its built-in Monitor ROM (MON) and SCI interface. Using the standard Motorola serial bootstrap protocol, users can erase, program, and verify FLASH memory without removing the device from the PCB. The MC68HC908GP32CP requires only a UART connection and 5 V power; no external HVPP voltage is needed. This capability is validated in Section 15 of the official datasheet and enables field firmware updates and production line programming.
What are the low-power modes supported by the MC68HC908GP32CP?
The MC68HC908GP32CP supports two hardware low-power modes: Wait Mode (CPU halted, peripherals active, RAM retained) and Stop Mode (all clocks stopped except LVI and optional RTC, RAM lost unless external backup). In Wait Mode, the ADC, TIM1/TIM2, SCI, and SPI remain operational and can generate interrupts to wake the CPU. The MC68HC908GP32CP achieves typical stop-current of 1 µA at 5 V, making it suitable for battery-powered applications with infrequent wake events.
Can the MC68HC908GP32CP ADC operate during low-power modes?
Yes, the MC68HC908GP32CP ADC can perform conversions in Wait Mode, with results triggering interrupts to wake the CPU. However, ADC operation is disabled in Stop Mode due to clock suspension. The ADC supports software-triggered and timer-triggered conversions, and its 10-bit resolution is maintained across the full 0–VDD range with ±1 LSB INL/DNL. The MC68HC908GP32CP datasheet specifies conversion times from 8 to 32 bus cycles depending on configuration - critical for real-time sampling deadlines.
Is the MC68HC908GP32CP pin-compatible with other HCS08 devices?
The MC68HC908GP32CP uses a 44-pin QFP package (case 824A) shared with several HCS08 family members, including the MC68HC908GP32ACF and MC68HC908GP32CF. Pin functions are identical across these variants; differences lie in FLASH endurance, temperature grade, and packaging markings - not pinout or electrical behavior. The MC68HC908GP32CP maintains full register-level compatibility with the GP32 family, enabling direct substitution in existing PCB layouts where voltage and timing margins permit.
MC68HC908GP32CP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Series:
- HC08
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 33
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC68HC908GP32CP FAQ
1.How can I place an order for MC68HC908GP32CP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908GP32CP 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 MC68HC908GP32CP reliable?
The price and inventory of MC68HC908GP32CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908GP32CP is usually 5 days.
3.What payment methods are accepted for MC68HC908GP32CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC908GP32CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC908GP32CP?
MC68HC908GP32CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC908GP32CP 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 MC68HC908GP32CP?
For technical support, including MC68HC908GP32CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908GP32CP requirements.
6.How does Aetrix verify that MC68HC908GP32CP is sourced from the original manufacturer or authorized distributors?
All MC68HC908GP32CP 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 MC68HC908GP32CP meets industry standards.
7.What is the process for return or replacement of MC68HC908GP32CP?
All MC68HC908GP32CP units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908GP32CP, 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 MC68HC908GP32CP part is unused and in its original packaging.
Return procedure for MC68HC908GP32CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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