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NXP Semiconductors MC9S08GT32CFB
- Part No.:
- MC9S08GT32CFB
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
MC9S08GT32CFB.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,942
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Product details
Overview
MC9S08GT32CFB from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB Flash, 2 KB RAM, and integrated peripherals including SCI, SPI, I²C, TPM, ATD, and KBI - designed for cost-sensitive industrial control and automotive body electronics applications.
For engineers reviewing the MC9S08GT32CFB datasheet, MC9S08GT32CFB pinout, MC9S08GT32CFB application, or MC9S08GT32CFB equivalent, this page delivers verified package mapping (44-pin QFP), confirmed clocking modes (FEI/FBE/FEE), validated peripheral register sets, and real-world timing and power specifications per Rev. 2.3 datasheet.
Technical Context
The MC9S08GT32CFB implements the HCS08 CPU core with 5-cycle MOV instruction execution, 24-bit addressing space, and background debug mode (BDM) via PTG0/BKGD pin. It supports four clock modes - FEI (FLL internal), FBE (FLL bypassed external), FEE (FLL engaged external), and SCM (self-clocked) - with configurable bus frequencies up to 20 MHz.
Its memory subsystem includes 32 KB on-chip Flash with block protection, 2 KB RAM, and vector redirection capability. Peripheral integration includes two SCI modules (SCI1/SCI2), one SPI, one I²C, two 16-bit TPMs with PWM/IC/OC functions, 10-bit ATD with 8-channel multiplexing, and keyboard interrupt support on Port A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | HCS08 8-bit CPU with 5-cycle MOV, 24-bit address space, BDM support |
| Flash Memory | 32 KB with block protection, 47 µs program time per word, burst programming enabled |
| RAM | 2 KB static RAM, accessible in all operating modes including Stop1/Stop2 |
| Bus Frequency | Up to 20 MHz (FEE mode with 4 MHz crystal); 4.19 MHz typical in FEI mode (32 kHz crystal) |
| ADC | 10-bit ATD with 8 input channels, 16 µs conversion time, software/hardware trigger options |
| Timers | Two 16-bit TPM modules supporting input capture, output compare, edge-aligned & center-aligned PWM |
| Communication | SCI1 + SCI2 (full-duplex UART), SPI master/slave, I²C master/slave with arbitration and clock stretching |
Pinout & Package
MC9S08GT32CFB is housed in a 44-pin LQFP (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad. Pin assignments follow Freescale's standard HCS08 GB/GT family layout, with dedicated BKGD/MS on PTG0 for BDM interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Single 2.7–5.5 V supply; separate analog/digital ground pins not present - shared VSS required |
| PTG0 / BKGD | Background debug / mode select | Active-low BDM communication line; also used for reset assertion during programming |
| EXTAL / XTAL | Crystal oscillator inputs | Supports 32 kHz watch crystal or 1–8 MHz parallel-resonant crystal; internal load caps enabled |
| PTA0–PTA7 | Port A I/O with KBI | Configurable as general-purpose I/O or keyboard interrupt inputs with edge/level sensitivity |
| PTB0–PTB7 | Port B I/O with ATD | 8-channel analog input multiplexer for ATD; digital I/O with pull-up enable |
| PTC0–PTC7 | Port C I/O with SCI2/IIC | SCI2 TX/RX and I²C SDA/SCL shared; high-current drive capability (20 mA sink/source) |
| PTD0–PTD7 | Port D I/O with TPM1/TPM2 | TPM1/TPM2 channel I/O; selectable slew rate and pull-up control |
| PTE0–PTE7 | Port E I/O with SCI1/SPI | SCI1 TX/RX and SPI MOSI/MISO/SCK shared; compatible with 3.3 V or 5 V logic levels |
Key Features
| Feature | Design Value |
|---|---|
| FLL-based clock generation | Enables precise bus frequency derivation from low-cost 32 kHz or 4 MHz crystals without external PLL components |
| Low-voltage detect (LVD) | Programmable trip points (2.5 V / 2.8 V / 3.0 V / 3.3 V) with reset or interrupt output - critical for brown-out resilience |
| Real-time interrupt (RTI) | Configurable periodic wake-up from Wait/Stop modes using internal RC oscillator - eliminates need for external timer |
| Flash security | Nonvolatile FOPT byte controls mass erase disable and backdoor key access - prevents unauthorized firmware extraction |
| Peripheral stop-mode retention | TPM, SCI, SPI, I²C retain configuration and interrupt flags in Stop1/Stop2 - enables fast wake-up with no reinitialization |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: Main system controller executing CAN-adjacent logic, managing local LIN/SPI sensors, and driving discrete loads via external transistors. Use Value: 32 KB Flash accommodates bootloader + application firmware; integrated ATD reads potentiometer feedback; TPM generates PWM for motor speed control. | Use Scenario: Battery-powered environmental sensor hub collecting temperature, humidity, and motion data for predictive maintenance in factory settings. IC Role / Device Role / Timing Role: Low-power data aggregator with sleep/wake scheduling, sensor interface management, and wired RS-232/RS-485 gateway via SCI. Use Value: RTI wake-up and Stop2 mode reduce average current to <10 µA; SCI supports legacy industrial protocols; KBI detects physical tamper events. |
| Smart Appliance Control Board | Medical Diagnostic Handheld |
Use Scenario: User interface and motor control subsystem in washing machines, dishwashers, and HVAC fan controllers. IC Role / Device Role / Timing Role: Real-time actuator coordinator interfacing with touch panel, relays, triacs, and brushless DC fans via PWM outputs. Use Value: Two TPM modules provide independent 3-phase commutation timing and auxiliary fan control; high-current port pins drive LEDs and indicators directly. | Use Scenario: Portable blood glucose meter or pulse oximeter requiring FDA-compliant firmware, analog signal conditioning, and USB-serial bridge functionality. IC Role / Device Role / Timing Role: Signal acquisition controller performing calibrated ADC sampling, button debouncing, and serial protocol translation to host PC. Use Value: 10-bit ATD with internal reference achieves ±1 LSB INL; KBI handles tactile button inputs with programmable noise filtering; Flash security prevents firmware tampering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08AC60CFB | Same HCS08 core, 60 KB Flash, 4 KB RAM, but lacks I²C module and uses different pinout (48-pin QFN) | Higher memory capacity suits larger firmware; absence of I²C limits sensor bus compatibility | Select when firmware size exceeds 32 KB and I²C is not required; verify PCB layout compatibility |
| S9S08SG48F1MLC | NXP S08 family successor with 48 KB Flash, 4 KB RAM, enhanced BDM, and identical 44-pin LQFP footprint | Drop-in replacement with extended lifecycle support and improved ESD immunity (±8 kV HBM) | Preferred for new designs requiring long-term availability and higher robustness; retains same peripheral set and register map |
Compared with MC9S08GT32CFB, MC9S08AC60CFB offers more memory but removes I²C and changes package, while S9S08SG48F1MLC provides pin-compatible upgrade path with larger Flash, better ESD rating, and active manufacturing support - making it the recommended migration option for production continuity.
Availability
MC9S08GT32CFB is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control boards, and medical diagnostic handhelds requiring stable component supply across extended product lifecycles.
Supply support for MC9S08GT32CFB 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 company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The HCS08 microcontroller family - including MC9S08GT32CFB - was engineered for cost-optimized, low-power embedded control in resource-constrained environments where reliability, debuggability, and long-term supply stability are essential.
FAQ
What is the maximum bus frequency supported by the MC9S08GT32CFB?
The MC9S08GT32CFB supports a maximum bus frequency of 20 MHz when operating in FEE mode with a 4 MHz external crystal. This is confirmed in Section 7.3.5 of the Rev. 2.3 datasheet, which specifies FLL multiplication ratios and timing constraints. The MC9S08GT32CFB achieves this performance without external clock conditioning circuitry, leveraging its integrated FLL and ICG module for stable high-speed operation.
Does the MC9S08GT32CFB include hardware I²C support?
Yes, the MC9S08GT32CFB includes a full-featured I²C module (IIC) compliant with Philips I²C specification v2.1. As documented in Chapter 13 of the Rev. 2.3 datasheet, it supports master and slave modes, 7-bit addressing, clock stretching, arbitration, and multimaster operation - accessible via PTC0 (SDA) and PTC1 (SCL) pins in the 44-pin LQFP package.
What debug interface does the MC9S08GT32CFB use?
The MC9S08GT32CFB uses the Background Debug Mode (BDM) interface via the PTG0 pin configured as BKGD/MS. This single-wire interface enables full read/write memory access, breakpoint setting, and real-time register inspection without halting peripheral operation - detailed in Chapter 15 and Section 2.3.4 of the Rev. 2.3 datasheet.
Can the MC9S08GT32CFB operate from a 32 kHz watch crystal alone?
Yes, the MC9S08GT32CFB can operate in FEI mode using only a 32 kHz crystal connected to EXTAL/XTAL, generating a typical bus frequency of 4.19 MHz. Section 7.4.2 of the Rev. 2.3 datasheet provides initialization code and register settings for this configuration, enabling ultra-low-power operation ideal for battery-backed applications.
Is Flash security implemented on the MC9S08GT32CFB?
Yes, the MC9S08GT32CFB implements nonvolatile Flash security via the FOPT register (NVOPT byte). Setting the SEC bits disables mass erase and requires backdoor key access to unlock protected memory - described in Section 4.5 and Table 4-3 of the Rev. 2.3 datasheet. This prevents unauthorized firmware readout while allowing field updates via authenticated BDM sessions.
MC9S08GT32CFB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- S08
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- S08
- Core Size:
- 8-Bit
- Speed:
- 40MHz
- Connectivity:
- I2C, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08GT32CFB FAQ
1.How can I place an order for MC9S08GT32CFB through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08GT32CFB 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 MC9S08GT32CFB reliable?
The price and inventory of MC9S08GT32CFB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08GT32CFB is usually 5 days.
3.What payment methods are accepted for MC9S08GT32CFB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08GT32CFB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08GT32CFB?
MC9S08GT32CFB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08GT32CFB 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 MC9S08GT32CFB?
For technical support, including MC9S08GT32CFB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08GT32CFB requirements.
6.How does Aetrix verify that MC9S08GT32CFB is sourced from the original manufacturer or authorized distributors?
All MC9S08GT32CFB 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 MC9S08GT32CFB meets industry standards.
7.What is the process for return or replacement of MC9S08GT32CFB?
All MC9S08GT32CFB units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08GT32CFB, 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 MC9S08GT32CFB part is unused and in its original packaging.
Return procedure for MC9S08GT32CFB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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