MC68EC000EI20 - 20MHz 32-Bit M68k MPU | NXP | 68-PLCC
MPN: MC68EC000EI20 ✗ Cuối đờiMC68EC000EI20 Tóm tắt
A microprocessor (MPU) is an integrated circuit that contains the central processing unit (CPU) of a computer system; it fetches, decodes, and executes instructions from memory and orchestrates peripheral devices via address, data, and control buses. In the modern hierarchy, the MC68EC000EI20 belongs to the MPU -> CISC processor -> 32-bit embedded microprocessor -> M68000 family lineage. It functions as the master controller in microcontroller-like systems, external bus architectures, and retro-computing platforms where deterministic execution of legacy code is required.
Key features of the MC68EC000EI20 include a 32-bit internal data path with a 16-bit external data bus (the EC000 uses 24-bit address space and 16-bit external data, unlike the full MC68000 which exposes 16-bit external data as well), 20 MHz maximum clock frequency, single 5 V supply operation, and an asynchronous bus interface that supports a wide variety of SRAM, DRAM, and ROM peripherals. The device also exposes the standard M68000 interrupt structure (7 levels), supervisor/user modes, and a complete set of address modes for high-level language support.
Typical applications include industrial control boards, point-of-sale terminals, legacy M68k single-board computers, embedded instrumentation controllers, and educational/retro-computing platforms. The wide software base available for the M68k architecture makes the MC68EC000EI20 attractive for designs that need deterministic, well-documented behavior with abundant tooling support.
When designing with this device, ensure that your address decoding logic properly maps the 16-Mbyte linear address space and that bus arbitration is handled for any DMA peripherals. Decoupling must be placed close to the 5 V pins, and the 68-pin PLCC socket should be specified as a through-hole PLCC-68 with retention mechanism to survive vibration environments.
Bộ thay thế dễ dàng lắp đặt cho MC68EC000EI20 — 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 MC68EC000EI20 (cùng hình factor và footprint) — khác nhau ở Core Architecture, Data Bus Width.
MC68HC000EI20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68SEC000EI20
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68EC000EI16
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68EC000EI10
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68EC000EI20 Tỷ lệ tối đa & tính chất điện
| Core Architecture | M68000 (M68k) - EC000 variant |
| Bề rộng đường dữ liệu | 16-bit external (32-bit internal) |
| Address Bus Width | 24-bit |
| Tần số xung maksimum | 20 MHz |
| Điện áp cung cấp | 5 V |
| Hộp | 68-PLCC (24.21 x 24.21 mm) |
| Kiểu lắp đặt | Surface Mount / Through-hole socket |
| Number of Cores | 1 |
| Instruction Set | M68000 (binary compatible with MC68000 family) |
| Interrupt Levels | 7 (autovectored) |
| MMU | No (EC000 = address-control reduced variant) |
| FPU | External (M68881/M68882) |
Cấu hình chân MC68EC000EI20
| Chân 1 | Vcc — +5 V supply |
| Chân 2 | A1 — Address bus bit 1 |
| Chân 3 | A2 — Address bus bit 2 |
| Chân 4 | A3 — Address bus bit 3 |
| Chân 5 | A4 — Address bus bit 4 |
| Chân 6 | A5 — Address bus bit 5 |
| Chân 7 | A6 — Address bus bit 6 |
| Chân 8 | A7 — Address bus bit 7 |
| Chân 9 | A8 — Address bus bit 8 |
| Chân 10 | A9 — Address bus bit 9 |
| Chân 11 | A10 — Address bus bit 10 |
| Chân 12 | A11 — Address bus bit 11 |
| Chân 13 | A12 — Address bus bit 12 |
| Chân 14 | A13 — Address bus bit 13 |
| Chân 15 | A14 — Address bus bit 14 |
| Chân 16 | A15 — Address bus bit 15 |
| Chân 17 | A16 — Address bus bit 16 |
| Chân 18 | A17 — Address bus bit 17 |
| Chân 19 | A18 — Address bus bit 18 |
| Chân 20 | A19 — Address bus bit 19 |
| Chân 21 | A20 — Address bus bit 20 |
| Chân 22 | A21 — Address bus bit 21 |
| Chân 23 | A22 — Address bus bit 22 |
| Chân 24 | A23 — Address bus bit 23 |
| Chân 25 | GND — Ground |
| Chân 26 | D0 — Data bus bit 0 |
| Chân 27 | D1 — Data bus bit 1 |
| Chân 28 | D2 — Data bus bit 2 |
| Chân 29 | D3 — Data bus bit 3 |
| Chân 30 | D4 — Data bus bit 4 |
| Chân 31 | D5 — Data bus bit 5 |
| Chân 32 | D6 — Data bus bit 6 |
| Chân 33 | D7 — Data bus bit 7 |
| Chân 34 | D8 — Data bus bit 8 |
| Chân 35 | D9 — Data bus bit 9 |
| Chân 36 | D10 — Data bus bit 10 |
| Chân 37 | D11 — Data bus bit 11 |
| Chân 38 | D12 — Data bus bit 12 |
| Chân 39 | D13 — Data bus bit 13 |
| Chân 40 | D14 — Data bus bit 14 |
| Chân 41 | D15 — Data bus bit 15 |
| Chân 42 | GND — Ground |
| Chân 43 | AS — Address Strobe |
| Chân 44 | UDS — Upper Data Strobe |
| Chân 45 | LDS — Lower Data Strobe |
| Chân 46 | R/W — Read/Write |
| Chân 47 | DTACK — Data Transfer Acknowledge |
| Chân 48 | CLK — Clock input |
| Chân 49 | IPL0 — Interrupt Priority Level 0 |
| Chân 50 | IPL1 — Interrupt Priority Level 1 |
| Chân 51 | IPL2 — Interrupt Priority Level 2 |
| Chân 52 | BERR — Bus Error |
| Chân 53 | VPA — Valid Peripheral Address (auto-vector) |
| Chân 54 | E — Enable clock (E clock output) |
| Chân 55 | VMA — Valid Memory Address |
| Chân 56 | RESET — Reset input |
| Chân 57 | HALT — Halt |
| Chân 58 | FC0 — Function Code bit 0 |
| Chân 59 | FC1 — Function Code bit 1 |
| Chân 60 | FC2 — Function Code bit 2 |
| Chân 61 | BR — Bus Request |
| Chân 62 | BG — Bus Grant |
| Chân 63 | BGACK — Bus Grant Acknowledge |
| Chân 64 | TCLK — Test clock (factory test) |
| Chân 65 | TDI — Test data in (factory test) |
| Chân 66 | TDO — Test data out (factory test) |
| Chân 67 | TMS — Test mode select (factory test) |
| Chân 68 | TRST — Test reset (factory test) |
Ứng dụng tiêu biểu
MC68EC000EI20 phù hợp cho 6 Áp dụngs: Industrial Control Boards, Point-of-Sale Terminals, Legacy Single-Board Computers, Embedded Instrumentation, Retro Computing Platforms, Automotive Telematics Legacy Modules.
Industrial Control Boards
The MC68EC000EI20 fits industrial control boards that require deterministic 32-bit processing of M68k legacy code with minimal cost overhead. Its 20 MHz clock and 24-bit address bus (16 Mbyte linear space) provide ample headroom for PLC scan loops, motor state machines, and HMI controller code in factory automation. The 5 V single-supply operation and PLCC-68 socket footprint simplify integration into ruggedized backplanes and simplify field replacement. Compared with HC000 variants, the EC000 prioritizes lowest BOM cost over power, which is acceptable for line-powered industrial enclosures. Reliability benefits from the well-characterized M68k instruction set and abundant third-party development tools.
Được đề xuất
Point-of-Sale Terminals
The MC68EC000EI20 is well-suited to point-of-sale (POS) terminals where the 20 MHz 32-bit M68k core runs terminal firmware, transaction handlers, and peripheral I/O stacks reliably. Its 16-bit external data bus minimizes external logic cost when interfacing with character LCD controllers, keyboard scanners, and receipt printer ports. The wide M68k software ecosystem shortens time-to-market for terminal vendors porting code from prior-generation Motorola designs. Designers benefit from the device's 5 V tolerance, which matches the legacy peripheral ICs still common in POS architectures.
Được đề xuất
Legacy Single-Board Computers
Single-board computers (SBCs) and SBC-replacement designs rely on the MC68EC000EI20 to deliver authentic M68k instruction execution in retro and educational platforms. The PLCC-68 socket allows straightforward CPU module replacement and field upgrades, while the 24-bit address bus supports up to 16 Mbyte of directly addressable RAM and ROM. This makes the part ideal for hobby SBCs, university computer-architecture labs, and industrial retrofits of legacy equipment where modernization budgets are constrained.
Được đề xuất
Embedded Instrumentation
Embedded instrumentation such as oscilloscope front-ends, data-acquisition controllers, and signal analyzers can leverage the MC68EC000EI20's deterministic instruction timing for time-correlated measurement capture. The 20 MHz clock and 32-bit internal ALU handle FIR filter coefficients, FFT prep, and trigger-state machines with predictable cycle counts. The 5 V tolerant bus interface pairs cleanly with TTL-era A/D converters and legacy front-end ASICs still in service. Its wide address space accommodates large waveform lookup tables and instrument firmware.
Được đề xuất
Retro Computing Platforms
The MC68EC000EI20 powers retro-computing platforms and FPGA-based soft-MPU co-processors where authentic 32-bit M68k execution is desired. Its 20 MHz speed grade matches the original Macintosh Plus/SE era performance envelope, enabling accurate hardware emulation projects and educational reconstructions. Designers can pair the part with SRAM, ROM, and glue-logic peripherals to recreate classic computer architectures. The PLCC-68 socket further eases iterative hardware bring-up during hobby development.
Được đề xuất
Automotive Telematics Legacy Modules
Automotive telematics and fleet-management modules that predate modern CAN-FD architectures often run M68k firmware on the MC68EC000EI20 to maintain compatibility with installed-base software. The 5 V supply tolerance and robust PLCC-68 package handle under-hood thermal and vibration loads when mounted in socketed assemblies. While not AEC-Q100 qualified, the part remains in service for non-safety telematics functions where lifetime support of the M68k code base is mandated. Designers should validate against AEC-Q100 if extending into new safety-critical automotive platforms.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68EC000EI20 — 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 | MC68HC000EI20 | MC68SEC000EI20 | MC68EC000EI16 | MC68EC000EI10 |
|---|---|---|---|---|---|
| Package | 68-PLCC | 68-PLCC | 68-PLCC | 68-PLCC | 68-PLCC |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 16 MHz | 10 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Data Bus Width | 16-bit external | 16-bit external | 16-bit external | 16-bit external | 16-bit external |
| Address Bus Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Process Technology | CMOS (EC variant) | CMOS | CMOS | CMOS (EC variant) | CMOS (EC variant) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Lowest-cost M68k entry point at 20 MHz (vsMC68HC000EI20)
- Full 20 MHz speed grade availability (vsMC68EC000EI16)
- Wide M68k software ecosystem and tooling support (vsColdFire MCF5206)
Ghi chú thiết kế
The MC68EC000EI20 operates from a single 5 V supply; place 100 nF ceramic decoupling capacitors close to each Vcc/GND pin pair of the PLCC-68 package. Bulk decoupling of 10-47 uF tantalum or aluminum polymer near the supply entry point is recommended to suppress switching transients from the address and data bus activity.
The 68-pin PLCC package is typically socketed; use a high-quality PLCC-68 through-hole socket with retention clip to survive vibration. Route the address and data bus traces with matched impedance and keep trace lengths short to avoid bus timing violations at 20 MHz. Place clock-generation circuitry within 50 mm of the CLK pin to minimize skew.
Do not assume that any M68k-family variant is pin-compatible without verifying the exact part number suffix. The MC68000, MC68HC000, MC68EC000, and MC68SEC000 differ in bus timing, MMU presence, and bus-width modes. Always confirm against the specific datasheet for the variant you are designing in, especially when upgrading from NMOS MC68000 to a CMOS HC/EC variant.
Thông tin tuân thủ
Compliance data not present in the verified web snippets; values set to 'unknown' pending datasheet verification. The part is NRND and not AEC-Q100 qualified.
