The eSH series IC's are 4-bit microcontroller based sound processors. The series is equipped with a synthesized speech to obtain good quality voice as well as one 4-bit input port, three 4-bit I/O ports, and one 4-bit output port (applicable to eSH007). By programming through the microcontroller, applications, such as section combination, trigger mode, output control, keyboard matrix, and other logic functions are easily put into effect.

Features

• System clock: 2 MHz @2.4V ~ 5.5V
• 3~340 seconds voice capacity are provided (@6kHz sample rate)
• Sleep mode to conserve power, less than 1uA@3V standby current
• Crystal or RC oscillator (optional or by auto-selection)
• Built in 4-bit tiny controller
• Input/Output ports:
  * One Input port (P1) with software controlled pull low resistor
  * Three input/output ports (P2 ~ P4)
     P2 is software controlled with pull-low resistor
     P2/P3 has software controlled wake-up function
     P4 is applicable to eSH120/170/250/285/340
  * One output port (P5) is applicable to eSH007
  * The I/O pin P3.2 can be modulated with 38.5kHz carry signal to implement IR function
  * The I/O pin P3.3 can be configured as flash with volume application
• Flash equipped with 4 volume level options: 1/2, 1/4, 1/8, & 1/16
• Single ROM for voice program with a maximum of 32K program addressing size
• Reset pin is available
• Readable ROM data via offset address
• 4-level stack for subroutine nesting
• Built-in traditional DAC and PWM Direct Drive. DAC/PWM can be automatically selected.
• Small variation traditional DAC current
• Sample rate range: 4k~24kHz
• PCM/EADPCM/EHADPCM algorithm for speech synthesis, which is transparent to users (to provide silence compression)
• Self-test function for checking IC status is supported
• Provides 4-step drive or sink current control for output pin (Vo1A / Vo1B functions as general output pin) and can directly drive/sink special motor or large loading component
• Waveform Mark function and Waveform Control Port (WCP) are provided to control
  operation that synchronizes with voice