Highly versatile communications controller

19 May 2004 Telecoms, Datacoms, Wireless, IoT News & Events

The trend throughout the telecoms industry is to integrate more product functions onto fewer chips, with single-chip products being the ultimate target in many applications. The CMX850 from CML brings together the very low power modem technology developed for the CMX860/867/868 range with an enhanced version of the widely used 80C51 microcontroller. The result is a highly versatile, low power, communications controller.

The interfacing to external memory (ROM/Flash and SRAM), LCD controller, and keypad is very straightforward and removes the need for 'glue' logic in many applications. All of the standard 80C51 features are retained and access to enhancements occurs through special function registers (SFRs). The development of software, therefore, requires only a standard compiler and PROM emulator.

The on-chip modem is essentially the two port circuitry (line and phone) of the company's CMX860 but enhanced to V.22bis (2400/2400). Communication between modem and 80C51 takes place through a C-Bus emulation which is mapped into the 80C51's special function register area. Users of the CMX860/7/8 will recognise the format and have no difficulty in moving current software onto the 80C51 platform.

The company says much attention has been paid in the design of the CMX850 to reduce power consumption to an absolute minimum. Numerous powerdown options allow functional elements not currently in use to be turned off. The 80C51 main clock can be selected to run from 12 MHz down to 12 kHz, with external memory accesses shortened to conserve power as main clock speed is reduced.

Versatility has also been maximised by the introduction of seven additional sources of interrupt built around the new 80C51 functions. With the ability to wake the microcontroller from various powerdown states, these interrupts open up whole new regimes of power conservation.

The CMX850 is targeted at low power, battery operated terminals which need to access the PSTN to upload or download data. Examples are: SMS and ADSI terminals; telemetry and meter reading systems; security systems; feature phones; routers; EPOS terminals; e-mail and Internet appliances.

Further reading:

Macom targets broadband radar with time delay MMIC
RFiber Solutions Telecoms, Datacoms, Wireless, IoT
Macom’s MADU FR1012 is a GaAs MMIC 1-bit true time delay device covering 4 GHz to 12 GHz, designed for broadband microwave systems where beam accuracy and signal integrity are critical.

Read more...

---

Compact analogue phase shifter
RF Design Telecoms, Datacoms, Wireless, IoT
The Mini-Circuits JSPHS-150+ is a compact analogue voltage-controlled phase shifter designed for narrowband RF applications between 100 and 150 MHz.

Read more...

---

Protect the integrity of critical video evidence
Surveillance News & Events
SWEAR has announced the Community Video Integrity Project, a new initiative designed to help cities and public agencies proactively protect the integrity of critical video and establish a verifiable record of authenticity from the moment it is captured.

Read more...

---

ONVIF strengthens authenticity of video surveillance footage
Surveillance News & Events
Amid a rising tide of manipulated and AI-generated footage, the add-on will equip the surveillance industry with a shared, standards-based way to establish where video came from and whether it has remained unaltered.

Read more...

---

Detect procurement fraud before losses escalate
Security Services & Risk Management News & Events Financial (Industry) Editor's Choice
Organisations need to move procurement fraud prevention closer to the point where suspicious activity occurs, rather than relying primarily on investigations after money has already been lost, according to SAS and FACTS Consulting.

Read more...

---

Wireless connectivity expanded
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Espressif Systems has introduced two new members of its ESP32 wireless SoC family: the ESP32-E22, the company’s first Wi-Fi 6E connectivity chip, and the ESP32-H21, an ultra-low-power Bluetooth LE microcontroller aimed at coin-cell and battery-powered devices.

Read more...

---

Integrated X-band radar front-end module
RF Design Telecoms, Datacoms, Wireless, IoT
Qorvo has introduced an X-band radar front-end solution that enables defence system designers to achieve higher performance without increasing size, weight or prime power.

Read more...

---

Introducing Aurata
CST Electronics Telecoms, Datacoms, Wireless, IoT
Antenova has launched Aurata SR4L112: a compact, high efficiency embedded 4G/LTE antenna engineered for long, narrow PCB designs.

Read more...

---

Multi-constellation GNSS module in a legacy-compatible footprint
Altron Arrow Telecoms, Datacoms, Wireless, IoT
Telit Cinterion has announced the SE869eK2L, a single-frequency L1 GNSS module designed to help device manufacturers upgrade legacy positioning designs with improved performance and cost efficiency, while preserving design continuity.

Read more...

---

Quectel expands 5G portfolio
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Quectel expands 5G portfolio with new Qualcomm- and UNISOC-based modules.

Read more...

---