Functional Description

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Before you perform any SCSI, VMEbus, or Ethernet I/O with the MVME166, it may be necessary to define some parameters (e.g., SCSI ID, Ethernet address, VMEbus mapping). For details on configuring the MVME166, refer to the setup command description in Chapter 3 in this manual, and in the MVME167Bug Debugging Package User’s Manual.

SRAM

The boards include 128KB of 32-bit wide static RAM with onboard battery backup that supports 8-, 16-, and 32-bit wide accesses. The SRAM allows the debugger to operate and limited diagnostics to be executed without the DRAM mezzanine. The SRAM is controlled by the VMEchip2, and the access time is programmable. The boards are populated with 100 ns SRAMs.

The SRAM is also battery backed up on the MVME166. The battery backup function is provided by a Dallas DS1210S. The DS1210S supports primary and secondary power sources. When the main board power fails, the DS1210S selects the source with the highest voltage. If one source should fail, the DS1210S switches to the redundant source. Each time the board is powered, the DS1210S checks power sources and if the voltage of the backup sources is less than two volts, the second memory cycle is blocked. This allows software to provide an early warning to avoid data loss. Because the DS1210S may block the second access, the software should do at least two accesses before relying on the data.

The MVME166 provides jumpers that allow either power source of the DS1210S to be connected to the VMEbus +5 V STDBY pin or one cell of the onboard battery. For example, the primary system backup source may be a battery connected to the VMEbus +5 V STDBY pin and the secondary source may be the onboard battery. If the system source should fail or the board is removed from the chassis, the onboard battery takes over.

Caution

For proper operation of the SRAM, some jumper combination must be installed on the Backup Power Source Select Header. If one of the jumpers is used to select the battery, the battery must be installed on the MVME166. The SRAM may malfunction if inputs to the DS1210S are left unconnected.

The onboard power source is a RAYOVAC FB1225 battery which has two BR1225 type lithium cells and is socketed for easy removal and replacement. A small capacitor is provided to allow the battery to be quickly replaced without data loss. The lifetime of the battery is very dependent on the ambient temperature of the board and the power-on duty cycle. The lithium battery supplied on the MVME166 should provide at least two years of backup time

MVME166IG/D2

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Motorola MVME166D2, MVME166IG/D2 manual Sram
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MVME166IG, MVME166D2, MVME166IG/D2 specifications

The Motorola MVME166IG/D2 is a pioneering embedded computer designed for high-performance applications in industrial and telecom sectors. This versatile computing platform is based on the PowerPC architecture, which ensures efficient processing capabilities and transfer of data, making it suitable for a wide range of applications, including real-time control, data acquisition, and system monitoring.

One of the main features of the MVME166IG/D2 is its powerful processor. The system is equipped with a PowerPC 603e processor, which offers a remarkable performance rate with a clock speed of up to 250 MHz. This high-speed processing capability allows for rapid data handling and processing, which is critical for demanding applications in real-time environments.

The MVME166IG/D2 also stands out due to its modular design. It supports multiple expansion slots that make it adaptable for different user needs. The system can accommodate additional cards or memory modules, allowing for increased versatility and capability in various operational scenarios.

In terms of connectivity, this embedded computer includes multiple communication interfaces such as Ethernet and serial ports, which facilitate seamless data transfer and communication within larger systems. This connectivity is crucial for integrating the device into existing industrial networks or for connecting with sensors and other equipment.

Another noteworthy characteristic of the MVME166IG/D2 is its robust build quality, which is essential for operation in challenging environments. The device is designed to endure high levels of shock and vibration, making it suitable for deployment in applications such as transportation or heavy machinery.

Additionally, the MVME166IG/D2 offers a range of software support which includes various real-time operating systems. This compatibility allows developers to choose the OS that best fits their application's requirements, enhancing the overall utility of the system.

In summary, the Motorola MVME166IG/D2 is a powerful, flexible embedded computing solution that excels in performance, modularity, and reliability. Its advanced features and durable design make it an ideal choice for industries that require precision, speed, and robustness in their computing solutions.
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