MC68HC11E1CFNE3R - 8-Bit 3MHz MCU 512B EE ROMless PLCC-52 | NXP
MPN: MC68HC11E1CFNE3R ⚠ Lần mua cuốiMC68HC11E1CFNE3R Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and programmable peripherals on one die. The 68HC11 architecture is a classic 8-bit CISC accumulator-based design originally introduced by Motorola and now maintained by NXP. The HC11E sub-family extends the base M68HC11 CPU with on-chip EEPROM, more RAM, expanded timer architecture, and the Serial Communications Interface (SCI) plus Serial Peripheral Interface (SPI), making it suitable for embedded control applications demanding a small instruction set with deterministic interrupt response.
Key features include the M68HC11 CPU core with 16-bit index registers and bit-manipulation instructions, 512 bytes of on-chip EEPROM with block protect for security, 512 bytes of on-chip RAM with data retention during standby, a non-multiplexed expanded bus mode, and power-saving STOP and WAIT modes. Peripherals include an 8-bit/16-bit timer subsystem with input capture and output compare, an 8-channel 8-bit ADC, an SCI, an SPI, POR (Power-On Reset), and a watchdog timer. The device is designed for fully static operation down to DC clock and supports asynchronous NRZ serial communication.
Architecturally, the 68HC11E1 combines a CISC CPU with a separate 16-bit program counter, two 8-bit accumulators (A and B) usable as a single 16-bit D accumulator, and three index registers (X, Y, SP). The 8-channel 8-bit successive-approximation ADC is paired with the SCI for embedded sensing, while the SPI port supports synchronous peripheral expansion. EEPROM block protect provides in-application security for calibration data, a hallmark of the 68HC11 platform.
Typical applications include industrial automation controllers, automotive body and chassis ECUs (pre-CAN era), appliance control boards, security and access-control panels, and legacy embedded systems requiring deterministic interrupt response. The 5 V supply and 3 MHz clock keep it well suited to low-EMI environments, while 38 I/O lines offer generous connectivity for sensors, keypads, displays, and relays.
When designing with this part, note that it is ROMless: an external program memory is mandatory and the expanded-mode bus interface must be wired to that memory. Ensure proper handling of the MODA/MODB mode pins to select single-chip vs expanded mode at reset. The MC68HC11E1CFNE3 is marked 'No Longer Manufactured' on the NXP product page, so design-in teams should plan for last-time-buy sourcing or evaluate NXP's current S08/S12/MPC families as functional successors.
This page synthesizes distributor stock signals, drop-in same-package alternatives from the 68HC11E family, and design notes not found on the NXP marketing summary.
Bộ thay thế dễ dàng lắp đặt cho MC68HC11E1CFNE3R — 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 MC68HC11E1CFNE3R (cùng hình factor và footprint) — khác nhau ở Package, Supply Voltage, Program Memory, Serial Interfaces, Core Architecture.
MC68HC11E1CFNE2R
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11E1CFNE3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11E0CFNE3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC11E0CFNE2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HCP11E1CFNE3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11E1CFNE3R Tỷ lệ tối đa & tính chất điện
| Core Processor | HC11 |
| Core Size | 8-Bit |
| Core Architecture | CISC |
| Maximum Clock Speed | 3 MHz |
| Program Memory Size | ROMless (none on-chip) |
| Program Memory Type | ROMless |
| EEPROM Size | 512 x 8 bytes |
| RAM Size | 512 x 8 bytes |
| Number of I/O | 38 |
| Connectivity | SCI, SPI |
| Peripherals | POR, WDT |
| Điện áp cung cấp | 5 V |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 52-PLCC (FN) 19.1 x 19.1 mm |
| Kiểu lắp đặt | Surface Mount |
| Bề rộng đường dữ liệu | 8-Bit |
| Packaging | Tape & Reel (R suffix) |
Cấu hình chân MC68HC11E1CFNE3R
| Chân 1 | IRQ — Maskable interrupt request |
| Chân 2 | PA7 — Port A bit 7 / timer I/O |
| Chân 3 | PA6 — Port A bit 6 |
| Chân 4 | PA5 — Port A bit 5 |
| Chân 5 | PA4 — Port A bit 4 |
| Chân 6 | PA3 — Port A bit 3 |
| Chân 7 | PA2 — Port A bit 2 |
| Chân 8 | PA1 — Port A bit 1 |
| Chân 9 | PA0 — Port A bit 0 |
| Chân 10 | PB7 — Port B bit 7 |
| Chân 11 | PB6 — Port B bit 6 |
| Chân 12 | PB5 — Port B bit 5 / OC1 |
| Chân 13 | PB4 — Port B bit 4 / OC2 |
| Chân 14 | PB3 — Port B bit 3 / OC3 |
| Chân 15 | PB2 — Port B bit 2 / OC4 |
| Chân 16 | PB1 — Port B bit 1 / OC5 |
| Chân 17 | PB0 — Port B bit 0 / OC6 |
| Chân 18 | PC0 — Port C bit 0 / ADDR8 |
| Chân 19 | PC1 — Port C bit 1 / ADDR9 |
| Chân 20 | PC2 — Port C bit 2 / ADDR10 |
| Chân 21 | PC3 — Port C bit 3 / ADDR11 |
| Chân 22 | PC4 — Port C bit 4 / ADDR12 |
| Chân 23 | PC5 — Port C bit 5 / ADDR13 |
| Chân 24 | PC6 — Port C bit 6 / ADDR14 |
| Chân 25 | PC7 — Port C bit 7 / ADDR15 |
| Chân 26 | PD0 — Port D bit 0 / RxD |
| Chân 27 | PD1 — Port D bit 1 / TxD |
| Chân 28 | PD2 — Port D bit 2 |
| Chân 29 | PD3 — Port D bit 3 |
| Chân 30 | PD4 — Port D bit 4 |
| Chân 31 | PD5 — Port D bit 5 / SS |
| Chân 32 | PD6 — Port D bit 6 / SCK |
| Chân 33 | PD7 — Port D bit 7 / MOSI |
| Chân 34 | PE0 — Port E bit 0 / ADC0 |
| Chân 35 | PE1 — Port E bit 1 / ADC1 |
| Chân 36 | PE2 — Port E bit 2 / ADC2 |
| Chân 37 | PE3 — Port E bit 3 / ADC3 |
| Chân 38 | PE4 — Port E bit 4 / ADC4 |
| Chân 39 | PE5 — Port E bit 5 / ADC5 |
| Chân 40 | PE6 — Port E bit 6 / ADC6 |
| Chân 41 | PE7 — Port E bit 7 / ADC7 |
| Chân 42 | XIRQ — Non-maskable interrupt |
| Chân 43 | MODB — Mode select B |
| Chân 44 | MODA — Mode select A |
| Chân 45 | RESET — Reset input, active low |
| Chân 46 | VRH — ADC high reference |
| Chân 47 | VRL — ADC low reference |
| Chân 48 | E — E clock output |
| Chân 49 | XOSC1 — Crystal oscillator input |
| Chân 50 | XOSC2 — Crystal oscillator output |
| Chân 51 | VDD — +5 V supply |
| Chân 52 | VSS — Ground |
Ứng dụng tiêu biểu
MC68HC11E1CFNE3R phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Automotive Body Electronics ECUs, Appliance Control Boards, Security and Access Control Panels, Point-of-Sale Terminals and Card Readers, Medical Monitoring Devices.
Industrial Automation Controllers
The MC68HC11E1CFNE3R is a strong fit for legacy industrial controllers thanks to its 8-bit HC11 CISC core at 3 MHz, 38 GPIO lines, on-chip 8-channel ADC, SCI, and SPI. The 512-byte EEPROM is used for retention of calibration constants and operating hours, while STOP/WAIT modes support low standby current. Pair it with an external EPROM for program storage in expanded mode and a 2-wire RS-485 driver for fieldbus connectivity.
Được đề xuất
Automotive Body Electronics ECUs
Pre-CAN body ECUs - window lift, mirror control, seat control, instrument clusters - historically used the 68HC11E1 for its rugged industrial temperature range and deterministic interrupt response. The 38 GPIO drive relays, H-bridges, and LED banks directly, while the on-chip ADC reads battery voltage, thermistors, and position feedback. The -40C to +85C industrial rating covers cabin electronics, while the external bus supports mask ROM or external flash for code storage.
Được đề xuất
Appliance Control Boards
White-goods controllers - washing machines, dishwashers, HVAC thermostats - leverage the HC11's I/O count and EEPROM block protect for storing wash-cycle parameters and tamper-resistant settings. The on-chip 8-bit ADC samples temperature sensors and water level, the timer subsystem generates PWM for motor control, and the SCI interfaces to LED or VFD displays. The 5 V single supply simplifies the analog front end for sensor conditioning.
Được đề xuất
Security and Access Control Panels
Keypad-based alarm panels and door controllers benefit from the 38 GPIO for matrix keypads, relay drivers, siren outputs, and zone inputs. The 512-byte EEPROM stores installer codes, zone configurations, and event logs - protected by the hardware block protect feature. The SCI provides a serial link to central monitoring stations, and the on-chip watchdog prevents firmware lockup. External program memory holds the main application code.
Được đề xuất
Point-of-Sale Terminals and Card Readers
Legacy POS terminals and magnetic-stripe card readers used the 68HC11E1 as a keyboard/display controller thanks to its generous GPIO count and integrated peripherals. The SCI links to the main terminal CPU, the SPI drives an alphanumeric LCD or dot-matrix display, and the timer subsystem generates beep tones. EEPROM stores terminal ID, encryption keys, and configuration parameters protected by the block-protect fuse.
Được đề xuất
Medical Monitoring Devices
Low-risk medical monitoring devices - blood-pressure cuffs, thermometers, infusion pump controllers in legacy designs - use the HC11E1 for its deterministic interrupt handling and proven long-term silicon reliability. The 8-channel ADC digitizes sensor signals, the EEPROM stores calibration tables, and the SCI connects to bedside monitors. The 5 V single supply simplifies analog signal conditioning circuits. For new designs, migrate to a modern Cortex-M or S12 MCU with active longevity.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC11E1CFNE3R — 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 | MC68HC11E1CFNE2R | MC68HC11E0CFNE3 | MC68HC11E0CFNE2 | MC68HCP11E1CFNE3 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 52-PLCC (FN) | 52-PLCC (FN) - same | 52-PLCC (FN) - same | 52-PLCC (FN) - same | 52-PLCC (FN) - same |
| Core / Speed | HC11 8-bit, 3 MHz | HC11 8-bit, 3 MHz | HC11 8-bit, 3 MHz | HC11 8-bit, 3 MHz | HC11 8-bit, 3 MHz |
| RAM | 512 bytes | 512 bytes | 512 bytes | 256 bytes | 512 bytes |
| EEPROM | 512 bytes | 2 KB | None (512 B ROM) | None (256 B ROM) | 512 bytes |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 3.0-5.5 V (low-voltage) |
| GPIO Count | 38 | 38 | 38 | 38 | 38 |
| Lifecycle Status | Last Time Buy (No Longer Manufactured) | Obsolete / NFM | Last Time Buy | Last Time Buy | Last Time Buy |
Bảo phân biệt quan trọng
- Larger EEPROM density in same package (vsMC68HC11E1CFNE2R)
- EEPROM available vs ROM-only (vsMC68HC11E0CFNE3)
- Standard 5 V supply vs wide-range low-voltage variant (vsMC68HCP11E1CFNE3)
- Tape & Reel ready vs tray packaging (vsMC68HC11E1CFNE3)
Ghi chú thiết kế
Estimated: at 5 V supply, the HC11E1 in active mode draws roughly 15-25 mA depending on peripheral use, falling below 50 uA in STOP mode with the watchdog disabled. Bulk-decouple VDD with at least a 10 uF tantalum plus a 100 nF ceramic placed within 25 mm of the VDD pin, and ensure the PLL/oscillator analog supply (AVDD if separate) is filtered separately. The internal POR requires VDD ramp time within 100 ms for reliable reset.
The MC68HC11E1 is ROMless in CFNE3R: external program memory must be wired on the expanded bus, or the device must be reconfigured via the MODA/MODB pins for single-chip mode (in which case the part must be sourced with internal ROM - E0 variants). Misconfiguring the mode pins or missing an external EPROM will cause the part to execute garbage vectors on reset.
Estimated: in a 52-PLCC package the HC11E1 typically dissipates under 250 mW at 3 MHz, so a thermal heatsink is unnecessary. Theta_JA is roughly 50-60 C/W, so worst-case junction-to-ambient rise is below 15 C. Ensure ambient stays below the 85 C industrial limit and watch for self-heating only if clock is overclocked above the 3 MHz rating.
The E clock output carries a 3 MHz (or OSC/2) square wave that can couple into adjacent analog traces; route analog inputs (port E ADC) away from the E clock net and keep the E clock trace short. If the oscillator is a crystal, place the load capacitors within 5 mm of XOSC1/XOSC2 and keep digital traces clear of the crystal body.
Thông tin tuân thủ
Compliance status not stated in the verified web data for this discontinued MCU; consult NXP product environmental compliance reports for definitive RoHS/REACH status.
