I. Basic Specification

MVME167‑002A is a 6U VME single-height industrial single-board computer (SBC) produced by Motorola/Emerson. It belongs to the MVME167 series. 002A is an enhanced version of 001A, with fully compatible pins and mechanical structure. It can be directly replaced and is suitable for industrial control scenarios that require larger memory, multiple tasks, and higher data caching.

II. Core Processor and Memory

Processor: MC68040RC25, 25 MHz, 32-bit, with built-in hardware FPU, 8KB L1 cache, MMU, same as 001A.

DRAM: 8MB 32-bit, with parity check (001A is 4MB), maximum expandable to 32MB.

SRAM: 128KB, battery backup (power-on retention), same as 001A.

Flash/ROM: 4×44-pin PLCC, 2×32-bit storage units, supports firmware固化.

NVRAM/RTC： Integrated real-time clock， battery backup.

III. Board-Built Interfaces (Completely consistent with 001A)

Ethernet： Single 10Mbps， 10BASE-T/AUI， DMA.

Serial Port： 4×EIA-232-D， 1 control console + 3 user ports， up to 115200bps.

SCSI-2: Single-ended, DMA, maximum 20MB/s, can connect 7 peripherals.

Parallel Port: 1×IEEE 1284, bidirectional.

VME Bus: A32/D32, master / slave / system controller.

Expansion： PMC expansion slot (optional)， no IP module interface.

Timer / Watchdog： 6×32-bit programmable timer， hardware WDT.

IV. Electrical and Environmental (Same as 001A)

Power Supply： +5V DC ±5%， typical 3.5A， maximum 4.5A.

Operating Temperature： 0℃～+55℃ (standard type).

Storage Temperature： -55℃～+125℃.

Cooling： Forced air cooling， approximately 100CFM.

V. Structure and Compatibility

Size： 6U VME (233.4×160mm)， single high.

Weight： Approximately 0.7kg.

Compatibility： Fully compatible with 001A/003A/004A pins， direct interchange.

VI. Key Differences (Compared with 001A)

Memory： 8MB (002A) vs 4MB (001A)， more suitable for multitasking and large data caching.

Others： Processor， interface， electrical， mechanical are exactly the same， firmware is universal.

VII. Typical Applications

Industrial automation， data acquisition， motion control， embedded systems， control scenarios requiring more memory than 001A.