Specifications

10 SAM0023-122898 ESS Technology, Inc.
ES1869 DATA SHEET
FUNCTIONAL DESCRIPTION
Digital Subsystems
• RISC microcontroller – game-compatible audio
functions are performed by an embedded microcontroller.
• Oscillator – circuitry to support an external crystal.
• ROM and RAM – firmware ROM and data RAM to the
embedded microcontroller.
• FIFO – RAM for a 256-byte FIFO data buffer for use with
the first audio channel and RAM for a 64-byte FIFO data
buffer for use with the second audio channel.
• ISA bus interface – provides interface to ISA bus
address, data, and control signals.
• Dual game port – integrated dual game port for two
joysticks.
• MPU-401 serial port – asynchronous serial port for MIDI
devices such as a wavetable synthesizer or a music
keyboard input.
• Wavetable serial port – serial port connection from the
output of an ES689 or ES69x that eliminates the
requirements for an external DAC.
• DSP serial port – interface to an optional external DSP
for control of the CODEC.
• I
2
S Zoom Video interface – supports sample rates up to
48 kHz for MPEG audio.
• ESFM music synthesizer – high-quality, OPL3 superset
FM synthesizer with 20 voices.
• Hardware volume control – 3 pushbutton inputs with
internal pull-up devices for up/down/mute that can be
used to adjust the master volume control.
A software-selectable option allows the mute input to
be omitted. The mute input is defined as the state when
both up and down inputs are low. By default, this
feature is disabled.
Analog Subsystems
• Record and Playback Mixers – seven input stereo
mixers. Each input has independent left and right 4-bit
volume control:
– Line In
– Mic In
– Aux A (CD-audio)
– Aux B (or FDXI)
– Digitized audio (wave files)
– FM / ES689/ES69x / I
2
S ZV music DAC
– MONO_IN/MONO_OUT
• 16-Bit stereo CODEC – for audio record and playback of
the first audio channel.
• 16-Bit stereo system DAC – for audio playback of the
second audio channel.
• 16-Bit stereo music DAC – for ESFM™, external
wavetable synthesizer, or IIS MPEG audio.
• 1-Bit DAC – for PC speaker digital input.
• 3-D Processor – a 3-D processor using Spatializer
®
VBX™ stereo 3-D audio effects technology, provided by
Desper Products, Inc., a subsidiary of Spatializer Audio
Laboratories, Inc.
• Record source and input volume control – input
source and volume control for recording. The recording
source can be selected from one of four choices:
– Line In
– Mic In
– Aux A (CD-audio)
– Mixer (playback or record)
• Mixer source – determines which mixer is used for the
record source, either the playback or record mixer.
• Output volume and mute control – The master volume
is controlled either by programmed I/O or by volume
control switch inputs. The master volume supports 6 bits
per channel plus mute.
• Reference generator – analog reference voltage
generator.
• PC speaker volume control – The PC speaker is
supported with a 1-bit DAC with volume control. The
analog output pin PCSPKO is intended to be externally
mixed at the external amplifier.
• Filter – switched capacitor low-pass filter.
• General purpose I/O – outputs available to system
software for power management or other applications.
• Pre-amp – 26 dB microphone pre-amplifier.