General Description

eSPA Series IC's are 4-bit micro-controller based sound processor with audio functions, such as multi-channel speech and multi-channel melody. The series are capable of performing all the functions available from ELAN's Esa, Esb and Esc Series IC's. The Espa Series are also embedded with an OTP (One Time Programmable) ROM.

Features

• System clock:
          * Crystal:
             3.58MHz @2.4 volts ~ 5.5 volts (Support for eSA/eSB/eSC function).
             4MHz @2.4 volts ~ 5.5 volts (Support for eSA/eSB/eSC function).
             6MHz @2.4 volts ~ 5.5 volts (Support for eSB/eSC function).
          * Embedded RC oscillator:
             3.58MHz @2.4 volts ~ 5.5 volts (Support for eSA/eSB/eSC function).
             4MHz @2.4 volts ~ 5.5 volts (Support for eSA/eSB/eSC function).
          * External RC oscillator:
             6MHz @2.4 volts ~ 5.5 volts (Support for eSB/eSC function).
• Input/Output ports:
          * One Input port (P1) with software controlled pull low resistor.
          * Three input/output ports (P2 ~ P4).
          * 4 steps (1/2, 1/4, 1/8/, and 1/16) light flashing with volume level options.
• MCU mode
          * Sleep mode for power saving (less than 1uA@3V standby current).
          * Green mode for reduced but continues operation at very low power consumption (less than 15uA@3V).
• Sound Output
          * Auto option: 8 bits PWM / 10 bits traditional current DA.
          * 128 steps volume control for each channel(for eSA function only); 16 steps DA current control for mixer output.
          * Software PCM/4bits ADPCM/5bits ADPCM algorithm for speech synthesis, is transparent to users.
          * Channel define, please refer eSC/eSB/eSA spec.
             eSC : 1 channel speech.
             eSB : 2 channel speech.
             eSA : 4 channels speech/music