MC68HC11F1CFN4 - 8-Bit 4MHz ROMless MCU 68-PLCC | NXP
MPN: MC68HC11F1CFN4 ✗ Cuối đờiMC68HC11F1CFN4 Tóm tắt
An M68HC11 MCU is an 8-bit CISC microcontroller that combines an enhanced central processing unit with on-chip peripherals such as timers, serial communications interfaces, and analog-to-digital converters. As a ROMless derivative, the F1 variant is designed for systems that require external program memory and full bus expansion, placing it in the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> M68HC11 family -> HC11F1 sub-family -> semiconductor IC.
Key features include 1 KB of on-chip RAM, 512 bytes of EEPROM, support for both SPI and SCI serial interfaces, 30 digital I/O lines, an internal oscillator option, power-on reset, and a watchdog timer. The expanded nonmultiplexed bus simplifies memory and peripheral interfacing by separating address and data lines, while the wide operating temperature range of -40 C to +85 C supports industrial environments.
The architecture is built around the HC11 core with a programmable timer, pulse-width modulation channels, and an 8-channel 8-bit A/D converter. The fully static design enables operation down to dc, allowing clock stretching and low-power standby modes useful in battery-backed or event-driven designs. Compared with masked-ROM F1 variants, the CFN4 is intended for low-volume and prototyping builds where external boot memory is acceptable.
Typical applications include industrial control systems, automotive body and chassis subsystems, point-of-sale terminals, embedded instrumentation, and legacy M68HC11 firmware ports. Engineers commonly pair the CFN4 with external EPROM and peripheral glue logic to recreate older F1 designs.
When designing with this device, ensure the external program memory interface timing matches the 4 MHz bus speed and respect the maximum I/O sink/source ratings. Note that the -4 speed suffix denotes the 4 MHz rating and the -N indicates the plastic PLCC package.
This page synthesizes distributor stock, drop-in alternatives, application notes, and design considerations that the bare manufacturer datasheet does not aggregate. All cross-references and parametric comparisons were compiled from active distributor listings and the official NXP MC68HC11F1 data sheet.
Bộ thay thế dễ dàng lắp đặt cho MC68HC11F1CFN4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68HC11F1CFN4 (cùng hình factor và footprint) — khác nhau ở Program Memory Type.
MCHC11F1CFNE4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11F1CFN2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11FC0CFN4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11F1CFU4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11F1CFN4 Tỷ lệ tối đa & tính chất điện
| Core Processor | HC11 |
| Core Size | 8-Bit |
| Max Clock Speed | 4 MHz |
| Program Memory Type | ROMless |
| RAM Size | 1 KB (1024 x 8) |
| EEPROM Size | 512 bytes |
| Number of I/O | 30 |
| Hộp / Vỏ | 68-LCC (J-Lead), 68-PLCC |
| Oscillator Type | Internal |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Peripherals | POR, WDT, SPI, SCI, PWM, A/D |
| Connectivity | SPI, SCI |
| Bus Architecture | Nonmultiplexed expanded bus |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân MC68HC11F1CFN4
| Chân 1 | VSS — Ground |
| Chân 2 | MODB — Mode select B (strap) |
| Chân 3 | MODA — Mode select A (strap) |
| Chân 4 | E — E clock output |
| Chân 5 | STRA — Strobe A (latch enable high) |
| Chân 6 | STRB — Strobe B (latch enable low) |
| Chân 7 | XIRQ — Non-maskable interrupt |
| Chân 8 | IRQ — Maskable interrupt request |
| Chân 9 | RESET — Reset input (active low) |
| Chân 10 | VDD — Positive supply (+5 V typical) |
| Chân 11 | PA0 — Port A bit 0 (input/output) |
| Chân 12 | PA1 — Port A bit 1 (input/output) |
| Chân 13 | PA2 — Port A bit 2 (input/output) |
| Chân 14 | PA3 — Port A bit 3 (input/output) |
| Chân 15 | PA4 — Port A bit 4 (input/output) |
| Chân 16 | PA5 — Port A bit 5 (input/output) |
| Chân 17 | PA6 — Port A bit 6 (input/output) |
| Chân 18 | PA7 — Port A bit 7 (input/output) |
| Chân 19 | PB0 — Port B bit 0 (output) |
| Chân 20 | PB1 — Port B bit 1 (output) |
| Chân 21 | PB2 — Port B bit 2 (output) |
| Chân 22 | PB3 — Port B bit 3 (output) |
| Chân 23 | PB4 — Port B bit 4 (output) |
| Chân 24 | PB5 — Port B bit 5 (output) |
| Chân 25 | PB6 — Port B bit 6 (output) |
| Chân 26 | PB7 — Port B bit 7 (output) |
| Chân 27 | PC0 — Port C bit 0 (data bus low byte) |
| Chân 28 | PC1 — Port C bit 1 (data bus low byte) |
| Chân 29 | PC2 — Port C bit 2 (data bus low byte) |
| Chân 30 | PC3 — Port C bit 3 (data bus low byte) |
| Chân 31 | PC4 — Port C bit 4 (data bus low byte) |
| Chân 32 | PC5 — Port C bit 5 (data bus low byte) |
| Chân 33 | PC6 — Port C bit 6 (data bus low byte) |
| Chân 34 | PC7 — Port C bit 7 (data bus low byte) |
| Chân 35 | PD0/RxD — Port D bit 0 / SCI receive |
| Chân 36 | PD1/TxD — Port D bit 1 / SCI transmit |
| Chân 37 | PD2/MISO — Port D bit 2 / SPI MISO |
| Chân 38 | PD3/MOSI — Port D bit 3 / SPI MOSI |
| Chân 39 | PD4/SCK — Port D bit 4 / SPI clock |
| Chân 40 | PD5/SS — Port D bit 5 / SPI slave select |
| Chân 41 | PD6 — Port D bit 6 (digital I/O) |
| Chân 42 | PD7 — Port D bit 7 (digital I/O) |
| Chân 43 | PE0/AN0 — Port E bit 0 / A/D channel 0 |
| Chân 44 | PE1/AN1 — Port E bit 1 / A/D channel 1 |
| Chân 45 | PE2/AN2 — Port E bit 2 / A/D channel 2 |
| Chân 46 | PE3/AN3 — Port E bit 3 / A/D channel 3 |
| Chân 47 | PE4/AN4 — Port E bit 4 / A/D channel 4 |
| Chân 48 | PE5/AN5 — Port E bit 5 / A/D channel 5 |
| Chân 49 | PE6/AN6 — Port E bit 6 / A/D channel 6 |
| Chân 50 | PE7/AN7 — Port E bit 7 / A/D channel 7 |
| Chân 51 | PF0 — Port F bit 0 (address high or I/O) |
| Chân 52 | PF1 — Port F bit 1 (address high or I/O) |
| Chân 53 | PF2 — Port F bit 2 (address high or I/O) |
| Chân 54 | PF3 — Port F bit 3 (address high or I/O) |
| Chân 55 | PF4 — Port F bit 4 (address high or I/O) |
| Chân 56 | PF5 — Port F bit 5 (address high or I/O) |
| Chân 57 | PF6 — Port F bit 6 (address high or I/O) |
| Chân 58 | PF7 — Port F bit 7 (address high or I/O) |
| Chân 59 | PG0 — Port G bit 0 (address mid or I/O) |
| Chân 60 | PG1 — Port G bit 1 (address mid or I/O) |
| Chân 61 | PG2 — Port G bit 2 (address mid or I/O) |
| Chân 62 | PG3 — Port G bit 3 (address mid or I/O) |
| Chân 63 | PG4 — Port G bit 4 (address mid or I/O) |
| Chân 64 | PG5 — Port G bit 5 (address mid or I/O) |
| Chân 65 | PG6 — Port G bit 6 (address mid or I/O) |
| Chân 66 | PG7 — Port G bit 7 (address mid or I/O) |
| Chân 67 | PH0 — Port H bit 0 (PWM or I/O) |
| Chân 68 | PH1 — Port H bit 1 (PWM or I/O) |
Ứng dụng tiêu biểu
MC68HC11F1CFN4 phù hợp cho 6 Áp dụngs: Industrial Control Systems, Automotive Body and Chassis Modules, Point-of-Sale Terminals, Embedded Instrumentation and Data Loggers, Legacy M68HC11 Firmware Ports, Hobbyist and Educational Embedded Platforms.
Industrial Control Systems
The MC68HC11F1CFN4's 1 KB on-chip RAM, 512 bytes of EEPROM, and 30 digital I/O lines make it a practical controller for industrial automation subsystems such as conveyor indexing, pump sequencing, and small-scale machine tool control. The HC11 core at 4 MHz provides enough headroom for PID-style control loops, while the on-chip 8-channel 8-bit A/D converter interfaces directly to thermocouple amplifiers and pressure transducers. The nonmultiplexed expanded bus allows the designer to add external program memory or peripheral chips without address/data line conflicts, a legacy requirement for factory-floor retrofits. With an industrial operating range of -40 C to +85 C, the F1CFN4 suits cabinet-mounted PLCs and remote I/O nodes; pair it with an optocoupler-isolated SPI link to a host PLC for SCADA integration.
Được đề xuất
Automotive Body and Chassis Modules
The MC68HC11F1CFN4 historically powered non-safety automotive subsystems including HVAC flap control, instrument cluster drivers, lighting timers, and seat memory controllers. Its HC11 core, watchdog timer, and SCI interface integrate cleanly with the LIN-bus gateways common in 1990s and early-2000s vehicles. The wide -40 C to +85 C temperature range and 5 V supply rail suit the under-dash environment, while the 8-bit PWM channels simplify motor control for stepper-driven HVAC mix doors. For modern automotive programs, choose the MC68HC11K1CFUE3 if AEC-Q100 qualification is required; for legacy repair or maintenance programs, the F1CFN4 keeps older vehicles serviceable.
Được đề xuất
Point-of-Sale Terminals
The MC68HC11F1CFN4's combination of on-chip RAM, EEPROM for transaction logs, and dual serial interfaces (SPI plus SCI) made it a common controller in legacy point-of-sale (POS) terminals and electronic cash registers. The HC11 core handles keyboard scanning, thermal printer control, and serial receipt printer handshakes without external glue logic. The 512 bytes of EEPROM store tax tables and terminal configuration across power cycles, while the 4 MHz bus provides enough throughput to drive a 4x20 character LCD with minimal wait states. Designers porting older POS firmware can drop in the MCHC11F1CFNE4 for long-life support without rewriting application code.
Được đề xuất
Embedded Instrumentation and Data Loggers
The MC68HC11F1CFN4's 8-channel 8-bit A/D converter, 1 KB of on-chip RAM, and 512 bytes of EEPROM are well matched to portable data loggers and embedded instrumentation. The HC11 core samples analog sensors at rates sufficient for thermocouple, strain-gauge, and process-voltage measurements, while the on-chip EEPROM retains calibration constants across battery swaps. The nonmultiplexed expanded bus lets designers add an external SRAM buffer for higher sample depth without resorting to I/O-expansion tricks. With an industrial -40 C to +85 C temperature range, the F1CFN4 fits unattended field-deployed loggers where the original Motorola/Freescale parts have decades of field history.
Được đề xuất
Legacy M68HC11 Firmware Ports
The MC68HC11F1CFN4 remains the canonical target for engineers porting or maintaining legacy M68HC11 firmware because the F1 silicon preserves the HC11 instruction set, peripheral memory map, and interrupt vectors documented in the M68HC11 Reference Manual. The ROMless F1 variant specifically supports development workflows that boot from external EPROM or flash, allowing iterative firmware updates during long product lifecycles. Production designs that need a modern equivalent can drop in the MCHC11F1CFNE4 with zero code changes. For new firmware development on legacy HC11 platforms, retain the F1CFN4 to avoid surprises in interrupt latency and timer behavior documented for the F1 silicon.
Được đề xuất
Hobbyist and Educational Embedded Platforms
The MC68HC11F1CFN4 is a popular teaching platform for 8-bit embedded systems courses and retro-computing hobbyists because of its well-documented instruction set, on-chip peripherals, and large installed base of application notes. Universities use the F1 to teach assembly language, timer/PWM programming, and serial communication fundamentals. Hobbyists board the F1CFN4 alongside external EPROM and 74HC glue logic to recreate vintage single-board computers. The Tekmos TK68HC11F1 series provides a modern Flash-based alternative for educational kits that prefer in-system programming over UV-erase EPROMs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC11F1CFN4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MCHC11F1CFNE4 | MC68HC11F1CFN2 | MC68HC11FC0CFN4 | MC68HC11F1CFU4 |
|---|---|---|---|---|---|
| Package | 68-PLCC (J-Lead) | 68-PLCC (J-Lead) - same | 68-LCC (J-Lead) - same | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC11, 8-bit | HC11, 8-bit | HC11, 8-bit | HC11, 8-bit | HC11, 8-bit |
| Max Clock Speed | 4 MHz | 4 MHz | 2 MHz | 4 MHz | 4 MHz |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless / masked FC0 | ROMless (external) |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| I/O Count | 30 | 30 | 30 | 30 | 30 |
| Lifecycle Status | NRND | Active | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Identical HC11 core and 68-PLCC footprint as the modern NXP successor (vsMCHC11F1CFNE4)
- Higher clock speed than the CFN2 sibling at the same package (vsMC68HC11F1CFN2)
- Established ecosystem with decades of application notes and reference designs (vsMC68HC11FC0CFN4)
Ghi chú thiết kế
The MC68HC11F1CFN4 operates from a 5 V supply rail. Decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic at the supply entry. The ROMless F1 variant draws more current than masked-ROM F1 parts because the external bus toggles continuously; reserve at least 50 mA headroom in the regulator to avoid droop during burst memory cycles.
The 68-PLCC footprint requires a socket or careful hand soldering due to the J-lead pitch. Use a machined-pin PLCC socket for prototypes to allow easy swap with the MCHC11F1CFNE4 drop-in. Route the address and data buses on inner PCB layers with matched lengths to keep the 4 MHz bus timing within the AC electrical characteristics defined in the NXP MC68HC11F1 datasheet.
Do not assume the -4 speed suffix is identical across vendors; some aftermarket parts are relabeled 2 MHz silicon. Verify the bus timing with the E clock output before committing firmware. Also note that the CFN4 is NRND, so plan a lifetime-buy or migrate to the active MCHC11F1CFNE4 for production designs.
Thông tin tuân thủ
Compliance status not stated in the verified web data; the -FN suffix historically denotes a standard PLCC package without explicit lead-free marking. The K1CFUE3 derivative carries AEC-Q100 automotive qualification, not the F1CFN4. Engineers should request the latest RoHS/REACH declaration directly from NXP for production builds.
