This document mainly introduces the embedded ultrasound talking toy feature of EM55200U and contains pending patent information
The EASY SOUND EM55200U is a high-quality voice synthesizer integrated circuit (IC) that includes an embedded tiny controller. It features one 4-bit input port, two 4-bit I/O ports, and the ability to generate or receive IR and ultrasonic carrier signals at 38 kHz.
The device supports direct drive output with a single power supply option and offers various synthesis modes including 5-bit ASPCM and 8-bit resolution D/A conversion. It includes features such as a built-in signal detector for ultrasound reception, power-down mode for energy saving, and capabilities for keyboard matrix implementation and other logic functions.
| Program Address Size | 32 K maximum |
|---|---|
| Modulation Carrier Frequency | 38K Hz |
| Operating Voltage Range | 2.2 to 5.5 V |
| Standby Current | 20 uA |
| Oscillation Frequency Range | 1.08 to 1.32 MHz |
The IC contains one 4-bit Input port, two 4-bit I/O ports, and a tiny controller.
Yes, two of its I/O pins can generate IR or ultrasonic carrier for transmission, and one pin can act as a receiver.
The device operates between 0.0°C and +70.0°C.