HP dc7800 tower manual Serial Interface, DB-9 Serial Connector Pinout

Models: dc7800 tower

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Input/Output Interfaces

5.4Serial Interface

Systems covered in this guide may include one RS-232-C type serial interface to transmit and receive asynchronous serial data with external devices. Some systems may allow the installation of a second serial interface through an optional bracket/cable assembly that attaches to header P52 on the system board. The serial interface function is provided by the super I/O controller component that includes two NS16C550-compatible UARTs.

The UART supports the standard baud rates up through 115200, and also special high speed rates of 239400 and 460800 baud. The baud rate of the UART is typically set to match the capability of the connected device. While most baud rates may be set at runtime, baud rates 230400 and 460800 must be set during the configuration phase.

The serial interface uses a DB-9 connector as shown in the following figure with the pinout listed in Table 5-4.

Figure 5-4. DB-9 Serial Interface Connector (as viewed from rear of chassis)

Table 5-4.

DB-9 Serial Connector Pinout

Pin

Signal

Description

Pin

Signal

Description

 

 

 

 

 

 

1

CD

Carrier Detect

6

DSR

Data Set Ready

 

 

 

 

 

 

2

RX Data

Receive Data

7

RTS

Request To Send

 

 

 

 

 

 

3

TX Data

Transmit Data

8

CTS

Clear To Send

 

 

 

 

 

 

4

DTR

Data Terminal Ready

9

RI

Ring Indicator

 

 

 

 

 

 

5

GND

Ground

--

--

--

 

 

 

 

 

 

The standard RS-232-C limitation of 50 feet (or less) of cable between the DTE (computer) and DCE (modem) should be followed to minimize transmission errors. Higher baud rates may require shorter cables.

 

5-6

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Technical Reference Guide

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HP dc7800 tower manual Serial Interface, DB-9 Serial Connector Pinout

dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.