The MCU automatic alarm device consisting of MODEM (modem) chip can transmit alarm information remotely by means of the factory, the internal telephone exchange network of the enterprise, and even the public telephone exchange network, regardless of location and time, truly safe and rapid. And correct. SSI73K222AL is a product launched by TDK Corporation and is a highly integrated single-chip MODEM chip. The main features of the chip are as follows: â— It can be connected with 8048 or 89C51 single-chip microcomputer, and the interface circuit is simple; â— serial port data transmission; â— It can work in both synchronous mode and asynchronous mode, including V. 22 expansion speeding; â— with CCITTV. 22, V. 21, BELL 212A, 103 standards compatible; â— It has the functions of call progress, carrier, answer tone and long loop detection; â— Ability to programmatically generate DTMF signals and 550 Hz, 1800 Hz defensive tone signals; â— With automatic gain control, dynamic range up to 45 dB; â— Adopt CMOS technology, low power consumption, single power supply. The SSI73K222AL is available in a 28DIP package with pins as shown in Figure 1-102. The SSI73K222AL has four internal registers for control and status monitoring. The control register CRO is used to control the way of data transmission on the telephone line; the control register CR1 is used to control the interface between the internal state of the SSI73K222AL and the microcontroller; the detection register DR is a read-only register, which provides conditions for monitoring the working state of the MODEM; TR is used to control the generation of audio signals. Under the control of TR, MODEM can generate DTMF signals, response tone signals and defensive tone signals. In addition, TR can also control RxD pins during MODEM startup and contact with the other party. . A brief description of the function of each status bit of the register and how to use each register is shown in Table 1-27 (for details, refer to the TDK 1997 MODEM data sheet). When constructing the MCU automatic alarm device, the following three options are available for the user to select. Table 1-27 Functions and usage of each status bit in the SS173K222AL register All-in-One Energy Storage System UFO All-in-One home battery storage system is an affordable answer for power supply problems. This solar power system is built with high efficiency battery with LiFePO4 technology. With a compact size and wheel design, it is convenient to install and move for homeowners. UFO POWER provides three models of All-in-One home battery storage system, including 3kW, 5kW and 7kW. The built-in lithium iron phosphate battery has go through rigorous inspection and quality control before assembly and this lithium product is accordance to CE.
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