Integrator’s Reference Manual

Changing Data and Control Port Configuration

You may change the Data and Control port configuration at any time, provided that the following requirements are met:

•The minimum hold time for both asserting and de-asserting either port DTR is 10 milliseconds.

•The minimum time from asserting DTR to data transmission is 10 milliseconds.

If these minimum times are not observed, AT command processing may be affected. The maximum time for holding all DTRs de-asserted is one second. If this time is exceeded, the modem will begin its power-down sequence.

Whenever the DTR signal of the Data or Control port has been de-asserted for a period of 10 seconds, the GSP-1620 modem shuts down the port’s RS-232 transmitter to conserve power. This causes the port’s DSR signal to be de-asserted.

The effects of changing the port configuration are detailed in Port Activation (DTR) Changes during Operation on page 5-15.

Control Port Signals

The Control port (CP) is an RS-232-level asynchronous interface operating at 9600 bps using Transmit Data (TxD), Receive Data (RxD), Data Terminal Ready (DTR), Data Set Ready (DSR), and Signal Common (GND).

RxD and TxD perform data transfer and handshaking, while DTR is used to turn on the modem and to let it know that there is an application waiting to talk to it.

The Control port specifically allows dedicated usage of the Data Port by the application. It allows all AT commands, modem alerting, and SMS messages to be sent simultaneously via a separate “control” port to/from the modem. This separation of functionality is especially useful in dormant mode, when the application and host sessions are active, and thus the Data port appears active/in use, although a Globalstar traffic channel is not up (no “In Call Status Message”).

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Qualcomm GSP-1620 specifications Changing Data and Control Port Configuration, Control Port Signals
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GSP-1620 specifications

Qualcomm GSP-1620 is a powerful, cutting-edge SoC (System on Chip) that is tailored for the demands of modern mobile and embedded applications. Designed to deliver high performance, energy efficiency, and advanced connectivity, the GSP-1620 stands out in the competitive landscape of processor solutions.

One of the main features of the GSP-1620 is its multi-core architecture, which facilitates simultaneous processing of multiple tasks. This architecture ensures enhanced multitasking capabilities, allowing devices to run complex applications smoothly without compromising performance. The GSP-1620 integrates Qualcomm's latest Kryo CPU technology, which optimizes performance while maintaining lower power consumption.

The GSP-1620 excels in graphics performance, powered by Adreno GPU technology. This integration enables rich visual experiences, making it ideal for gaming, augmented reality, and immersive multimedia applications. The GPU's capabilities allow for high frame rates and stunning graphics, ensuring that users enjoy a premium visual experience.

In terms of connectivity, the GSP-1620 supports advanced wireless technologies, including 5G, Wi-Fi 6, and Bluetooth 5. With these capabilities, users can expect ultra-fast data speeds, low latency, and improved networking performance. The integration of Qualcomm’s Snapdragon X55 modem enhances the SoC's capability to deliver seamless connectivity in various environments, whether indoors or outdoors.

Moreover, the GSP-1620 features cutting-edge AI and machine learning capabilities, enabled by Qualcomm’s Hexagon DSP technology. This allows for efficient processing of AI tasks, supporting functionalities such as voice recognition, image processing, and real-time translation. It makes the GSP-1620 suitable for applications in smart devices, automotive solutions, and industrial IoT.

Security is a priority in the design of the GSP-1620. The SoC incorporates hardware-based security features that protect sensitive data and applications, ensuring robust defense against cyber threats. This is vital for applications requiring high levels of security, such as mobile payments and confidential communications.

Lastly, the GSP-1620 is designed with scalability in mind. Its modular architecture allows manufacturers to customize the chipset according to specific needs, making it a versatile solution for a broad range of devices, from smartphones and tablets to wearables and embedded systems.

In summary, Qualcomm GSP-1620 combines high-performance processing, advanced graphics capabilities, sophisticated connectivity options, AI support, and robust security features. With these characteristics, it sets a new standard for mobile and embedded platforms, driving innovation in a variety of industries.
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