I. Basic Specification

MVME167‑003A is a 6U VME single-height industrial single-board computer (SBC) from Motorola/Emerson, belonging to the medium configuration model of the MVME167 series. 003A = 25MHz + 16MB DRAM. The pinout / mechanical / interface is fully compatible with 001A/002A/004A and can be directly interchanged.

II. Core Processor and Memory

Processor: MC68040RC25, 25 MHz, 32-bit, with built-in FPU, 8KB L1, MMU.

DRAM: 16MB 32-bit parity (001A = 4MB, 002A = 8MB, 004A = 32MB), maximum 32MB.

SRAM: 128KB battery backup (power-on retention).

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

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

III. Board-Specific Interfaces (Consistent with the Entire Series)

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

Serial Port: 4×EIA-232-D (1 controller + 3 user), up to 115200 bps.

SCSI-2: Single-ended, DMA, 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).

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

IV. Electrical and Environmental

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

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

Storage Temperature: -55℃～+125℃.

Cooling: Forced air cooling, approximately 100 CFM.

V. Structure and Compatibility

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

Weight: Approximately 0.7kg.

Compatibility: Fully compatible with 001A/002A/004A pins, direct replacement.

VI. Memory Overview of the Series (Version A)

001A: 4MB

002A: 8MB

003A: 16MB

004A: 32MB

VII. Typical Applications

Industrial automation, data acquisition, motion control, medium-load embedded systems, standard VME control scenarios requiring 16MB memory.