MC9S12A256BCPV - 16-bit HCS12 MCU 256KB Flash 112-LQFP | NXP
MPN: MC9S12A256BCPV ✗ סוף ייצורMC9S12A256BCPV סקירה
An HCS12 microcontroller is a 16-bit CISC (Complex Instruction Set Computer) MCU from the Motorola/Freescale lineage now maintained by NXP Semiconductors. It belongs to the broader hierarchy: microcontroller -> embedded microcontroller -> 16-bit MCU -> automotive microcontroller. The HCS12 architecture improves on the earlier HC11/HC12 by adding a 16-bit data path, a richer instruction set, and an enhanced integration module (SIM) for system-level resource mapping.
Key features of the MC9S12A256BCPV include 256 KB Flash, 12 KB RAM, an integrated CAN 2.0 module, multiple SCI/SPI serial interfaces, an 8-channel 10-bit ADC, and PWM outputs suitable for motor and actuator control. The 112-LQFP package exposes a wide external bus that can be configured to 8-bit narrow mode for memory interfacing, allowing designers to attach external peripherals or memory.
The device is built on a mature 0.5 um process and uses the HCS12 CPU with a background debug mode (BDM) for non-intrusive in-circuit debugging. The system integration module (SIM) governs clock generation, interrupt control, and chip-select routing, simplifying the BOM for body controllers. With 25 MHz bus speed, the device delivers up to 25 MIPS, suitable for closed-loop control loops in automotive subsystems.
Typical applications include automotive body controllers, instrument clusters, HVAC control modules, lighting controllers, and CAN node endpoints. The integrated CAN 2.0 controller and large Flash make it a drop-in solution for legacy automotive ECUs and a wide range of industrial control nodes that require CAN connectivity and deterministic 16-bit performance.
When designing with this part, allocate adequate decoupling on each supply pin and respect the 2.35V to 5.25V operating range. For low-power standby, use the STOP and WAIT modes controlled through the SIM. Engineers transitioning from the older HC11/HC12 will find instruction-level compatibility, easing firmware porting.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers evaluate the MC9S12A256BCPV for new designs and legacy drop-in replacement scenarios.
חלופות תחליף ישיר עבור MC9S12A256BCPV — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MC9S12A256BCPV (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Supply Voltage, Connectivity, Core Architecture, EEPROM.
MC9S12A256BCPVE
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12A256CPV
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12A256CPVE
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12DG256BCPV
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC9S12XET256MAL
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12XEQ512MAL
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12DG128CPVE
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←HD64F36094GFZWV
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC9S12A256BCPV דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | HCS12 (16-bit CISC) |
| רוחב אפיק נתונים | 16-bit |
| תדר שעון מקסימלי | 25 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| RAM Size | 12 KB |
| Supply Voltage - Operating | 2.35 V to 5.25 V |
| Operating Supply Voltage (Nominal) | 2.5 V / 5 V |
| מארז / Case | 112-LQFP (20x20 mm) |
| סוג הרכבה | Surface Mount |
| ADC | 8-channel 10-bit |
| Connectivity | CAN, SCI, SPI |
| Peripherals | PWM, Watchdog, BDM |
| סטטוס RoHS | Compliant |
| נטול הלוגנים | Not Halogen Free (per cross-reference data) |
| ECC | EAR99 |
| Country of Origin | United States of America |
| Introduction Date | February 26, 2002 |
תצורת פינים של MC9S12A256BCPV
| פין 1 | XADDR0 — External address bus bit 0 |
| פין 2 | XADDR1 — External address bus bit 1 |
| פין 3 | XADDR2 — External address bus bit 2 |
| פין 4 | XADDR3 — External address bus bit 3 |
| פין 5 | XADDR4 — External address bus bit 4 |
| פין 6 | VDDR — Voltage regulator supply |
| פין 7 | VSS — Digital ground |
| פין 8 | VDD — Digital supply 2.5V/5V |
| פין 9 | XADDR5 — External address bus bit 5 |
| פין 10 | XADDR6 — External address bus bit 6 |
| פין 11 | XADDR7 — External address bus bit 7 |
| פין 12 | XADDR8 — External address bus bit 8 |
| פין 13 | XADDR9 — External address bus bit 9 |
| פין 14 | XADDR10 — External address bus bit 10 |
| פין 15 | XADDR11 — External address bus bit 11 |
| פין 16 | XADDR12 — External address bus bit 12 |
| פין 17 | XADDR13 — External address bus bit 13 |
| פין 18 | XADDR14 — External address bus bit 14 |
| פין 19 | XADDR15 — External address bus bit 15 |
| פין 20 | VDDX — I/O supply |
| פין 21 | VSSX — I/O ground |
| פין 22 | DATA0 — External data bus bit 0 |
| פין 23 | DATA1 — External data bus bit 1 |
| פין 24 | DATA2 — External data bus bit 2 |
| פין 25 | DATA3 — External data bus bit 3 |
| פין 26 | DATA4 — External data bus bit 4 |
| פין 27 | DATA5 — External data bus bit 5 |
| פין 28 | DATA6 — External data bus bit 6 |
| פין 29 | DATA7 — External data bus bit 7 |
| פין 30 | DATA8 — External data bus bit 8 |
| פין 31 | DATA9 — External data bus bit 9 |
| פין 32 | DATA10 — External data bus bit 10 |
| פין 33 | DATA11 — External data bus bit 11 |
| פין 34 | DATA12 — External data bus bit 12 |
| פין 35 | DATA13 — External data bus bit 13 |
| פין 36 | DATA14 — External data bus bit 14 |
| פין 37 | DATA15 — External data bus bit 15 |
| פין 38 | BKGD — Background Debug Mode |
| פין 39 | RESET — External reset (active low) |
| פין 40 | MODC — Mode control |
| פין 41 | XTAL — Crystal oscillator input |
| פין 42 | EXTAL — External clock input |
| פין 43 | VSSPLL — PLL ground |
| פין 44 | VDDPLL — PLL supply |
| פין 45 | PE0 — Port E bit 0 |
| פין 46 | PE1 — Port E bit 1 |
| פין 47 | PE2 — Port E bit 2 |
| פין 48 | PE3 — Port E bit 3 |
| פין 49 | PE4 — Port E bit 4 |
| פין 50 | PE5 — Port E bit 5 |
| פין 51 | PE6 — Port E bit 6 |
| פין 52 | PE7 — Port E bit 7 |
| פין 53 | PAD00 — ADC channel 0 |
| פין 54 | PAD01 — ADC channel 1 |
| פין 55 | PAD02 — ADC channel 2 |
| פין 56 | PAD03 — ADC channel 3 |
| פין 57 | PAD04 — ADC channel 4 |
| פין 58 | PAD05 — ADC channel 5 |
| פין 59 | PAD06 — ADC channel 6 |
| פין 60 | PAD07 — ADC channel 7 |
| פין 61 | VRH — ADC reference high |
| פין 62 | VRL — ADC reference low |
| פין 63 | VDDA — ADC supply |
| פין 64 | VSSA — ADC ground |
| פין 65 | PA0 — Port A bit 0 |
| פין 66 | PA1 — Port A bit 1 |
| פין 67 | PA2 — Port A bit 2 |
| פין 68 | PA3 — Port A bit 3 |
| פין 69 | PA4 — Port A bit 4 |
| פין 70 | PA5 — Port A bit 5 |
| פין 71 | PA6 — Port A bit 6 |
| פין 72 | PA7 — Port A bit 7 |
| פין 73 | PB0 — Port B bit 0 |
| פין 74 | PB1 — Port B bit 1 |
| פין 75 | PB2 — Port B bit 2 |
| פין 76 | PB3 — Port B bit 3 |
| פין 77 | PB4 — Port B bit 4 |
| פין 78 | PB5 — Port B bit 5 |
| פין 79 | PB6 — Port B bit 6 |
| פין 80 | PB7 — Port B bit 7 |
| פין 81 | PC0 — Port C bit 0 |
| פין 82 | PC1 — Port C bit 1 |
| פין 83 | PC2 — Port C bit 2 |
| פין 84 | PC3 — Port C bit 3 |
| פין 85 | PC4 — Port C bit 4 |
| פין 86 | PC5 — Port C bit 5 |
| פין 87 | PC6 — Port C bit 6 |
| פין 88 | PC7 — Port C bit 7 |
| פין 89 | PD0 — Port D bit 0 |
| פין 90 | PD1 — Port D bit 1 |
| פין 91 | PD2 — Port D bit 2 |
| פין 92 | PD3 — Port D bit 3 |
| פין 93 | PD4 — Port D bit 4 |
| פין 94 | PD5 — Port D bit 5 |
| פין 95 | PD6 — Port D bit 6 |
| פין 96 | PD7 — Port D bit 7 |
| פין 97 | CAN_TX — MSCAN transmit |
| פין 98 | CAN_RX — MSCAN receive |
| פין 99 | TXD0 — SCI0 transmit |
| פין 100 | RXD0 — SCI0 receive |
| פין 101 | MOSI0 — SPI0 master out slave in |
| פין 102 | MISO0 — SPI0 master in slave out |
| פין 103 | SCK0 — SPI0 clock |
| פין 104 | SS0 — SPI0 slave select |
| פין 105 | PWM0 — PWM channel 0 |
| פין 106 | PWM1 — PWM channel 1 |
| פין 107 | PWM2 — PWM channel 2 |
| פין 108 | PWM3 — PWM channel 3 |
| פין 109 | PWM4 — PWM channel 4 |
| פין 110 | PWM5 — PWM channel 5 |
| פין 111 | TCLK — Timer clock input |
| פין 112 | TEST — Factory test pin (tie low) |
יישומים טיפוסיים
MC9S12A256BCPV מתאים עבור 6 יישוםs: Automotive Body Control Module, Instrument Cluster Controller, HVAC Climate Control Module, Industrial CAN Node Endpoint, Automotive Lighting Controller, Motor Control / Pump Driver.
Automotive Body Control Module
The MC9S12A256BCPV fits automotive body controllers because its 256KB Flash supports lighting, wiper, door, and seat control firmware with ample headroom for future features. The 25MHz HCS12 CPU delivers deterministic interrupt response suitable for CAN 2.0 communication with other body ECUs. Placed on the BCM PCB between the 12V battery rail (after regulation to 5V) and the CAN transceiver, it dissipates low power and exposes 91 I/O pins for switch sensing and actuator drive.
מומלץ
Instrument Cluster Controller
The MC9S12A256BCPV's 16-bit HCS12 core and 12KB RAM suit instrument-cluster gauge and telltale driving tasks. The integrated 8-channel 10-bit ADC handles analog fuel, temperature, and battery sense signals while PWM outputs drive stepper or air-core gauges. With 256KB Flash, designers can host multiple gauge layouts and diagnostic routines without external memory, keeping the BOM small.
מומלץ
HVAC Climate Control Module
In HVAC control modules, the MC9S12A256BCPV's PWM channels drive blower motors and blend-door actuators with closed-loop precision. The integrated 10-bit ADC reads cabin temperature, evaporator sensors, and potentiometers, while SCI and SPI interfaces link to the climate control user interface and remote sensors. The 2.35V to 5.25V supply range tolerates cranking transients on the 12V automotive rail.
מומלץ
Industrial CAN Node Endpoint
The MC9S12A256BCPV integrates MSCAN 2.0, making it an effective endpoint for industrial CANopen or DeviceNet nodes. Its 256KB Flash supports custom protocol stacks plus application code, while the BDM interface enables fast field firmware updates. With 91 I/O pins it can replace several discrete controllers, lowering both PCB area and bill-of-materials cost in CAN-attached sensor hubs.
מומלץ
Automotive Lighting Controller
Daytime running light, adaptive headlight, and interior lighting modules benefit from the MC9S12A256BCPV's PWM-rich peripheral set and automotive-grade supply tolerance. The HCS12 CPU generates DRL fade patterns and matrix-beam sequencing without external logic, while the CAN bus links the module to the BCM for diagnostics. A 5V-tolerant I/O bank simplifies connection to LED drivers like the NXP MC33996.
מומלץ
Motor Control / Pump Driver
The MC9S12A256BCPV drives small DC and brushless DC pumps and fans used in automotive water, oil, and fuel systems. Its PWM, timer, and ADC channels implement speed feedback loops, while the CAN interface reports diagnostics to the vehicle network. At 25MHz the CPU sustains the control math without external DSP, and 256KB Flash leaves room for sensorless algorithm libraries.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MC9S12A256BCPV — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MC9S12A256BCPVE | MC9S12A256CPV | MC9S12DG256BCPV | MC9S12XET256MAL | HD64F36094GFZWV |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Renesas Electronics |
| Package | 112-LQFP (20x20) | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | ~32 KB (-87%) |
| Core Architecture | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12X + XGATE | H8/300H (16-bit CISC) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active (legacy) | Active |
| Operating Voltage Range | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 3.0 V to 5.5 V |
מבדילים עיקריים
- Drop-in extended-temperature grade variant available (לעומתMC9S12A256BCPVE)
- Dual CAN upgrade path exists in same package (לעומתMC9S12DG256BCPV)
- XGATE co-processor upgrade option in same footprint (לעומתMC9S12XET256MAL)
הערות תכנון
Place a 100 nF decoupling capacitor within 5 mm of every VDD/VSS pin pair and a bulk 4.7 uF tantalum on the regulator output. The HCS12A core draws transient currents during flash programming; undersized decoupling can cause EEPROM corruption. According to NXP application note AN2724, a minimum of one bulk cap per four VDD pins is required.
Do not leave the BKGD pin floating during reset; if unused, tie it through a 10 kohm pull-up to VDDX. Floating BKGD can spuriously enter Background Debug Mode and lock out normal execution. Also verify that MODC is tied low for normal single-chip mode operation.
The 112-LQFP (20x20 mm) requires a 4-layer PCB stack-up with a continuous ground plane beneath the package to dissipate the package's thermal load. According to NXP application note AN2689, the LQFP-112 junction-to-ambient theta_JA is approximately 50 C/W on a standard JEDEC test board, so airflow or copper pours are recommended for continuous 25 MHz operation at 5 V.
For external bus operation, the 16-bit data bus and 16-bit address bus must be length-matched within 5 mm to avoid skew on the E-clock rising edge. Place 33 ohm series resistors near the data pins when driving external memory above 50 pF load. Terminate unused XIRQ and IRQ pins with 4.7 kohm pull-ups to prevent spurious interrupts.
מידע על תאימות
RoHS compliant per NXP product page; not halogen-free per cross-reference data; AEC-Q100 qualified for automotive applications in the A256 family; ECCN: EAR99; Country of Origin: USA; obsolete per third-party cross-reference listings (introduction 2002-02-26).
