Table 2-8. DMA Channel Assignments

Channel

Function

 

 

0

Available for 8-bit transfers

1

Available for 8-bit transfers

2

Floppy controller

3

Available for 8-bit transfers

 

 

4

Cascade for channels 0-3

5

Available for 16-bit transfers

6

Available for 16-bit transfers

7

Available for 16-bit transfers

 

 

Battery-Backed Clock

An AT-compatible battery-backed real-time clock (with CMOS RAM) is standard on the Little Board P6d module. A 3.0 volt Lithium battery soldered to the board powers the clock. Battery drain for the clock is less than 0.4 uA. This battery will support the clock for more than 10 years of normal usage.

The factory initializes the real-time clock and various parameters in the configuration memory for a standard configuration. The factory sets the date and time, but it may not be set for your time zone. Use Setup to change these values as needed.

The contents of the configuration memory are also stored in an on-board EEPROM. The ROM BIOS reads the EEPROM to get configuration information if the CMOS RAM data is lost. This means the board will function if the battery fails.

Note

The real-time clock date and time will not be correct without a battery, or after the battery fails.

Serial Ports

The Little Board P6d module provides four RS232C serial ports, Serial 1 and Serial 2 at J8, and Serial 3 and Serial 4 at J11.

Serial 1 and Serial 2 have full modem support. Serial 3 and Serial 4 support only RXD, TXD, RTS, CTS. All ports support software selectable standard baud rates up to 115.2Kbps, 5-8 data bits, and 1, 1.5, or 2 stop bits.

Note

The IEEE RS232C specification limits the serial port to 19.2Kbps on cables up to 50 feet in length.

2-12

Page 30
Image 30
Ampro Corporation 5001451A manual Battery-Backed Clock, Serial Ports, Channel Function

5001451A specifications

Ampro Corporation is known for its commitment to quality and innovation, particularly in the field of embedded computing solutions. One of its standout products, the Ampro Corporation 5001451A, is a robust and versatile embedded computing platform designed to meet the demanding needs of industrial applications.

The 5001451A features a compact and modular design that allows for flexibility and ease of integration into various systems. It is built around a powerful processor, ensuring high performance for data-intensive operations. This embedded platform can support various operating systems, giving developers the freedom to choose the environment that best suits their project requirements. Additionally, the system's architecture is optimized for low power consumption, which is critical for applications where energy efficiency is paramount.

One of the key characteristics of the 5001451A is its extensive I/O capabilities. It includes multiple ports for serial communication, USB, and Ethernet, making it highly adaptable for different connectivity needs. The system also supports various expansion options, allowing users to add additional functionalities as required. This adaptability is essential for industries such as telecommunications, transportation, and medical devices, where specific operational demands vary widely.

Moreover, the 5001451A is designed with durability in mind. It can operate effectively in challenging environments, with features such as extended temperature ranges and resistance to shock and vibration. This ruggedness makes it an ideal choice for deployment in outdoor installations or industrial settings where equipment is subjected to harsh conditions.

The product also integrates advanced security features to protect against cyber threats, which is increasingly important in today's connected world. With built-in encryption and secure boot capabilities, the 5001451A ensures that sensitive data is safe and that the system remains reliable against unauthorized access.

In summary, the Ampro Corporation 5001451A stands out as a powerful, flexible, and reliable embedded computing solution. Its combination of performance, modularity, durability, and security makes it an excellent choice for a wide range of industrial applications, making it a go-to option for developers and engineers seeking a dependable embedded platform. With the ongoing advancements in technology, the 5001451A is well-positioned to adapt to future challenges and opportunities in the ever-evolving landscape of embedded systems.