MC9S12A128BCFU - HCS12 16-Bit MCU 128KB Flash 80-QFP | NXP
料号： MC9S12A128BCFU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.4 | $254.00 |
| 100 | $22.1 | $2,210.00 |
| 500 | $19.8 | $9,900.00 |
| 1,000 | $18.2 | $18,200.00 |
MC9S12A128BCFU 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), peripherals such as timers, ADC, and communication controllers, and a bus system. Within the embedded semiconductor hierarchy, an MCU sits between a microprocessor (no on-chip memory or peripherals) and an SoC (multi-core, often with application processors). The HCS12 belongs to the 16-bit microcontroller class, bridging 8-bit legacy designs and 32-bit ARM Cortex-M devices by offering automotive-grade peripherals and a CPU12 instruction set with CISC efficiency and high code density.
The MC9S12A128BCFU is distinguished by its on-chip peripherals including an 8-channel 10-bit ADC, PWM channels, SCI/SPI communication interfaces, a CAN 2.0 module, and a system integration module (SIM). Operating from a 5V supply at industrial temperature range (-40C to +85C), it supports in-circuit debugging via the BKGD pin and offers robust reset and interrupt management. The HCS12 CPU delivers 25 MHz performance with a rich instruction set tuned for automotive real-time control.
Internally, the device uses a 16-bit data path with an 8-bit external bus mode for memory interfacing, the MC9S12A128BCFU follows the HCS12 architecture: HCS12 CPU core -> 16-bit microcontroller -> embedded microcontroller -> IC. The device integrates standard on-chip peripherals as documented in the 9S12A128 Device Guide published by Motorola and now maintained by NXP. Operating voltage is typically 5V, with industrial-grade temperature support.
Typical applications include automotive body electronics, industrial control systems, CAN node modules, sensor interface boards, motor control peripherals, and consumer appliances requiring 16-bit performance with CAN connectivity. Engineers often choose the MC9S12A128BCFU when migrating from older HC11/HC12 designs or designing cost-sensitive automotive ECUs.
When designing with this MCU, ensure proper decoupling on VDDR, VDDX, and VDD1 pins, and follow NXP's recommendations for ECLK and reset pin conditioning. Background debug mode (BDM) allows non-intrusive debugging but requires proper BKGD pin pull-up and MODC configuration during reset.
This page synthesizes distributor pricing, drop-in HCS12 family alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MC9S12A128BCFU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC9S12A128BCFU （相同外形与封装尺寸） ——差异在于 Package, Connectivity, Operating Temperature, RAM Size, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
MC9S12A128CFUE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S12E128CFUE
✅ 直接替换✓ 有现货
$10.65 / 个
查看数据手册 →MC9S12DJ128BCFU
✅ 直接替换✓ 有现货
$8.4 / 个
查看数据手册 →MC9S12DG128VFUE
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MC9S12XS128MAA
✅ 直接替换✓ 有现货
$7.6 / 个
查看数据手册 →MC9S12A128BCFU 最大额定值与电气特性
| Core | HCS12 CPU (16-bit CISC) |
| Maximum CPU Frequency | 25 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 4 KB |
| EEPROM Size | 2 KB |
| Number of I/O Pins | 59 |
| ADC | 8-channel, 10-bit |
| 电源电压 | 5 V |
| 封装 | 80-QFP (14x14 mm) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +85C (industrial) |
| Oscillator Type | External (crystal/resonator or external clock) |
| Connectivity | CAN, SCI, SPI |
| RoHS 状态 | Compliant (per part stack listing) |
| Peripheral Highlights | 8-ch 10-bit ADC, PWM, SCI/SPI, CAN 2.0, SIM |
MC9S12A128BCFU 引脚配置
| 引脚 1 | PP0 — Port P bit 0 / PWM channel 0 |
| 引脚 2 | PP1 — Port P bit 1 / PWM channel 1 |
| 引脚 3 | PP2 — Port P bit 2 / PWM channel 2 |
| 引脚 4 | PP3 — Port P bit 3 / PWM channel 3 |
| 引脚 5 | PP4 — Port P bit 4 / PWM channel 4 |
| 引脚 6 | PP5 — Port P bit 5 / PWM channel 5 |
| 引脚 7 | PP6 — Port P bit 6 / PWM channel 6 |
| 引脚 8 | PP7 — Port P bit 7 / PWM channel 7 |
| 引脚 9 | VSS — Ground |
| 引脚 10 | VDDX — External supply voltage (5V) |
| 引脚 11 | VDDR — Voltage regulator supply (5V) |
| 引脚 12 | VSSX — External ground |
| 引脚 13 | VDD1 — Internal logic supply (2.5V) |
| 引脚 14 | VSS1 — Internal logic ground |
| 引脚 15 | PAD0 — Port AD bit 0 / AN0 analog input |
| 引脚 16 | PAD1 — Port AD bit 1 / AN1 analog input |
| 引脚 17 | PAD2 — Port AD bit 2 / AN2 analog input |
| 引脚 18 | PAD3 — Port AD bit 3 / AN3 analog input |
| 引脚 19 | PAD4 — Port AD bit 4 / AN4 analog input |
| 引脚 20 | PAD5 — Port AD bit 5 / AN5 analog input |
| 引脚 21 | PAD6 — Port AD bit 6 / AN6 analog input |
| 引脚 22 | PAD7 — Port AD bit 7 / AN7 analog input |
| 引脚 23 | PA0 — Port A bit 0 / address line |
| 引脚 24 | PA1 — Port A bit 1 / address line |
| 引脚 25 | PA2 — Port A bit 2 / address line |
| 引脚 26 | PA3 — Port A bit 3 / address line |
| 引脚 27 | PA4 — Port A bit 4 / address line |
| 引脚 28 | PA5 — Port A bit 5 / address line |
| 引脚 29 | PA6 — Port A bit 6 / address line |
| 引脚 30 | PA7 — Port A bit 7 / address line |
| 引脚 31 | PB0 — Port B bit 0 / data line |
| 引脚 32 | PB1 — Port B bit 1 / data line |
| 引脚 33 | PB2 — Port B bit 2 / data line |
| 引脚 34 | PB3 — Port B bit 3 / data line |
| 引脚 35 | PB4 — Port B bit 4 / data line |
| 引脚 36 | PB5 — Port B bit 5 / data line |
| 引脚 37 | PB6 — Port B bit 6 / data line |
| 引脚 38 | PB7 — Port B bit 7 / data line |
| 引脚 39 | PJ0 — Port J bit 0 (CAN0 RX) |
| 引脚 40 | PJ1 — Port J bit 1 (CAN0 TX) |
| 引脚 41 | PJ2 — Port J bit 2 |
| 引脚 42 | PJ3 — Port J bit 3 |
| 引脚 43 | PJ4 — Port J bit 4 |
| 引脚 44 | PJ5 — Port J bit 5 |
| 引脚 45 | PJ6 — Port J bit 6 |
| 引脚 46 | PJ7 — Port J bit 7 |
| 引脚 47 | PM0 — Port M bit 0 |
| 引脚 48 | PM1 — Port M bit 1 |
| 引脚 49 | PM2 — Port M bit 2 |
| 引脚 50 | PM3 — Port M bit 3 |
| 引脚 51 | PM4 — Port M bit 4 |
| 引脚 52 | PM5 — Port M bit 5 |
| 引脚 53 | PM6 — Port M bit 6 |
| 引脚 54 | PM7 — Port M bit 7 |
| 引脚 55 | PS0 — Port S bit 0 / SCI0 TXD |
| 引脚 56 | PS1 — Port S bit 1 / SCI0 RXD |
| 引脚 57 | PS2 — Port S bit 2 / SPI0 SCK |
| 引脚 58 | PS3 — Port S / SPI0 MOSI |
| 引脚 59 | PS4 — Port S / SPI0 MISO |
| 引脚 60 | PS5 — Port S / SPI0 SS |
| 引脚 61 | PS6 — Port S bit 6 |
| 引脚 62 | PS7 — Port S bit 7 |
| 引脚 63 | PT0 — Port T bit 0 / TIM0 IOC0 |
| 引脚 64 | PT1 — Port T bit 1 / TIM0 IOC1 |
| 引脚 65 | PT2 — Port T bit 2 / TIM0 IOC2 |
| 引脚 66 | PT3 — Port T bit 3 / TIM0 IOC3 |
| 引脚 67 | PT4 — Port T bit 4 / TIM0 IOC4 |
| 引脚 68 | PT5 — Port T bit 5 / TIM0 IOC5 |
| 引脚 69 | PT6 — Port T bit 6 / TIM0 IOC6 |
| 引脚 70 | PT7 — Port T bit 7 / TIM0 IOC7 |
| 引脚 71 | PE0 — Port E bit 0 / IRQ |
| 引脚 72 | PE1 — Port E bit 1 / XIRQ |
| 引脚 73 | PE2 — Port E bit 2 |
| 引脚 74 | PE3 — Port E bit 3 |
| 引脚 75 | PE4 — Port E bit 4 / ECLK |
| 引脚 76 | PE5 — Port E bit 5 / MODC |
| 引脚 77 | RESET — External reset input (active low) |
| 引脚 78 | BKGD — Background Debug / TAGHI / MODC mode pin |
| 引脚 79 | XTAL — Crystal oscillator input |
| 引脚 80 | EXTAL — External clock / crystal oscillator input |
典型应用
MC9S12A128BCFU 适用于 6 应用s: Automotive Body Electronics, Industrial CAN Node Module, Sensor Interface Board, Motor Control Peripheral MCU, Consumer Appliance Controller, Legacy HC11/HC12 Design Migration.
Automotive Body Electronics
The MC9S12A128BCFU fits automotive body ECU applications because its HCS12 16-bit core at 25 MHz delivers deterministic real-time control, the 8-channel 10-bit ADC reads multiple sensor inputs (temperature, position, light), and the integrated CAN 2.0 module provides bus connectivity to other body ECUs. The 128 KB Flash holds body module firmware, while 4 KB RAM and 2 KB EEPROM support non-volatile fault logging. The 80-QFP package (14x14) gives generous thermal dissipation for engine-bay-grade temperature exposure when backed by PCB copper pour. Compared with 32-bit ARM Cortex alternatives, the HCS12 family offers lower BOM cost and a mature automotive toolchain.
推荐
Industrial CAN Node Module
The MC9S12A128BCFU serves as a CAN node controller on industrial Fieldbus networks. Its 59 GPIO handle digital I/O, the 8-channel ADC interfaces analog sensors, the SCI port bridges to RS-232/RS-485, and the CAN module communicates on the industrial bus at up to 1 Mbaud. The 128 KB Flash supports CANopen or DeviceNet protocol stacks with room for application logic. The 25 MHz HCS12 core offers fast interrupt response for time-deterministic control loops. Industrial-grade temperature rating (-40C to +85C) supports factory floor deployment. Drop-in compatibility with the A128CFUE and E128CFUE lets engineers tier designs by node complexity.
推荐
Sensor Interface Board
The MC9S12A128BCFU is ideal for multi-sensor interface boards because the integrated 8-channel 10-bit ADC reads multiple sensor signals simultaneously, the 59 GPIO provide digital channels for switches and indicators, and 4 KB RAM handles transient sensor fusion calculations. The 128 KB Flash stores calibration coefficients, sensor linearization tables, and protocol code. HCS12 interrupts prioritize sensor safety events. The 5V supply rail simplifies sensor biasing. Compared to discrete microcontrollers with external ADC, the integrated ADC reduces BOM cost and PCB footprint on the 14x14 QFP.
推荐
Motor Control Peripheral MCU
The MC9S12A128BCFU supports small motor-control peripheral applications using its PWM channels and 25 MHz HCS12 timing precision. The 8-channel ADC reads motor current/voltage feedback, while the PWM outputs drive gate drivers for brushed DC or stepper motors. 128 KB Flash holds PID control loops and ramp profiles. The integrated peripheral set reduces external component count compared to discrete designs. The 80-QFP package provides adequate thermal performance for moderate-load applications.
推荐
Consumer Appliance Controller
The MC9S12A128BCFU is well suited for consumer appliance control boards requiring CAN bus communication, multiple sensor inputs, and reliable user interfaces. The 128 KB Flash stores user-interface firmware and appliance operating profiles, while the 8-channel 10-bit ADC reads temperature, humidity, and load sensors. The HCS12 real-time interrupt architecture ensures deterministic UI response. The 80-QFP 14x14 footprint fits mid-size appliance PCBs. Industrial temperature rating supports laundry-room and kitchen-environment reliability.
推荐
Legacy HC11/HC12 Design Migration
The MC9S12A128BCFU is the natural upgrade path for legacy HC11 and HC12 designs because the HCS12 core maintains backward code compatibility while offering 16-bit performance and integrated peripherals. 128 KB Flash accommodates migrated HC11 firmware with room for new features, and 4 KB RAM supports larger stack frames. The 80-QFP footprint matches common HC12 layouts, simplifying board-level migration. Industrial temperature rating covers most legacy application environments.
推荐
推荐产品汇总
工程参考数据： MC9S12A128BCFU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC9S12A128CFUE | MC9S12E128CFUE | MC9S12DJ128BCFU | MC9S12DG128VFUE | MC9S12XS128MAA |
|---|---|---|---|---|---|---|
| Package | 80-QFP (14x14) | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Core | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12 (16-bit CISC) | HCS12X (16-bit CISC + XGATE) |
| Max Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 40 MHz |
| Flash Size | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| RAM Size | 4 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM Size | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| ADC | 8-ch 10-bit | 8-ch 10-bit | 8-ch 10-bit | 8-ch 10-bit | 8-ch 10-bit | 8-ch 12-bit |
| GPIO Count | 59 | 59 | 59 | 59 | 59 | 59 |
| Temperature Grade | Industrial (-40C to +85C) | Automotive (-40C to +105C) | Automotive (-40C to +105C) | Automotive (-40C to +105C) | Automotive (-40C to +105C) | Automotive (-40C to +125C) |
关键差异点
- Lower cost variant in HCS12 128KB family （对比 MC9S12A128CFUE)
- Industrial temperature range optimized （对比 MC9S12XS128MAA)
- Original A-series baseline peripheral set （对比 MC9S12DJ128BCFU)
设计说明
Per the 9S12A128 Device Guide, VDDX (5V external), VDDR (5V regulator input), VDD1/VSS1 (internal logic), and VDDPLL/VSSPLL (PLL supply) each require dedicated decoupling. Place 100 nF ceramic capacitors as close to each pin pair as possible. Add a bulk 10 uF tantalum near the VDDX pin to suppress voltage transients during peak MCU load events. Order of power sequencing matters during startup: VDDR must ramp first to enable the internal regulator, followed by VDDX and then VDD1.
Do not float the MODC and BKGD/TAGHI pins. During reset, the BKGD pin is sampled to determine the BDM mode entry; if left floating, unpredictable reset behavior results. Tie MODC high (normal expanded mode) or low (special mode) via a 1-10 kohm resistor per the device guide. The RESET pin must have a clean input; an RC filter with 100 nF and 10 kohm is the typical recommended configuration. Avoid using GPIO pins that share physical packages with RESET, MODC, or ECLK for mission-critical signals.
The 80-QFP 14x14 mm package has 0.65 mm pin pitch requiring 4-layer PCB routing with at least 0.2 mm trace-and-space. Place a continuous ground plane beneath the MCU to provide thermal dissipation and reference. Keep ADC analog inputs (PAD0-PAD7) routed away from high-frequency digital lines to minimize coupling. The ECLK pin can radiate harmonics; surround it with ground shielding. Maintain the 80-pin QFP land pattern exactly per JEDEC MS-022 for reliable assembly.
The HCS12 external bus can be configured for 8-bit narrow or 16-bit wide modes. When using 16-bit mode, match address and data line trace lengths within 1-2 mm to avoid timing skew on reads. Place a 33 ohm series damping resistor near the MCU on ECLK to reduce ringing. The CAN bus pins (PJ0/PJ1) require a CAN transceiver such as TJA1050T, with proper 120 ohm termination at the bus ends per ISO 11898.
合规信息
RoHS compliance per part stack listing. Industrial temperature grade - the part is not AEC-Q100 qualified; for AEC-Q100 qualified HCS12 automotive variants, choose the CFUE suffix parts (MC9S12A128CFUE, MC9S12E128CFUE). Motorola originally released the 9S12A128 Device Guide; current part is maintained by NXP after the Freescale acquisition.