ICA9901 Embedded Microcontroler for Telecom Applications

The ICA9901 component is a low consumption digital integrated circuit , implemented as a SoC (System on a Chip) developed to meet the specifications of public phone cards by ICATEL .


Parts os this microchip are: a 80c51 microprocessor, a M14268 Real Timer Clock , and RAM internal memories totalizing 16 K for either code memory or data memory uses.

The ICA9901 also performs the functions of CPU, RTC, RAM, I / OControl , internal registers and interface with ROM memory .

Applications:

The device was designed to, with a ROM memory and a MODEM, implement functions of control on public phone' s main board with inductive card.

The followed especifications meet the requirements of both Brazilian and Chinese market, which facilitates the export of Brazilian public telephones to different countries.

The operation modes of low consumption allow the system a long period of operation with batteries.

The full compatibility of its programming with the 80c51 microcontroller facilitates the development and maintenance of its firmware.

Features:

Using ICA9901 integrated circuit, the system performs, beyond existing functions in previous versions, also the following functions:

  • Code addressing in flash/E2prom, Eprom (64 kbytes), boot in Eprom (8 kbytes) and page (2 Kbytes) in the internal RAM.
  • Integrated RTC M146818 , used to generate signals of 182 Hz and 800 Hz; it can also be programmed to generate 8192 Hz
  • monitor circuits (watchdog timer), authorized by internal record programming.
  • Entry ports that awake the CPU
  • Generator of 800 Hz enabled by internal recorder.
  • Generator of 182 Hz enabled by internal recorder.