LC786821E Datasheet, PDF (3/35 Pages) ON Semiconductor – Compressed Audio Signal Processor IC

LC786821E
<Audio output processing block>
 Analog Audio data output (One channel for stereo, and one channel for Sub-Woofer)
Eight-fold over-sampling digital filter (24bit)
Secondary LPF for audio output
 Electronic Volume/Fader
5ch outputs (Lch-Front (LF)/Rear (LR), Rch-Front (RF)/Rear (RR), Sub-Woofer)
Output Range: 0dB to 0dB, 
0dB to 32dB
: Analog control, 0.25dB step
32dB to 70dB
: Analog control, 1.0dB step
70dB to 90dB
: Digital attenuator control
Decrease the noise at the volume change timing by the digital and analog composite control.
Individual output for 5 channels control is available
 Digital Audio data output
Digital 3-line interface with IIS/MSB first right justification and etc.
LR clock, Bit clock, Data 1
Clock can be master or slave
Capable of outputting 384Fs clock
[ External interface functions ]
<USB host/device control block>
 Open Host Controller Interface 1.0a
 Universal Serial Bus Specification 2.0 Full Speed
 Supports four kinds of transfer type (Control/Bulk/Interrupt/Isochronous)
 Supports 2 Ports. USB1=Host or Device, USB2=Host only
 USB Charger (USB1 only)
Supports detection of CDP (Charging Downstream Port) of USB Charger Specification 1.2
Charge (supplying current) is not supported
 PHY block: Internal Pull-Down/Pull-Up resisters built-in
<SD memory card host control block>
 Multimedia Card Specification v2.11
 Secure Digital Memory Card Physical Layer Specification v0.96
* Individual contract is necessary to use SD memory card controller.
[ Internal Microcontroller functions ]
<Sequencer control>
 USB, SD memory card playback/write control
USB/SD files analysis, etc.
 Audio playback control
Compressed audio playback control, various filter control and etc.
<Communication control between main controller>
 Main communication format is SIO (4-line)
 Capable of direct control of oscillation stop/start from main microcontroller
 Capable of some special command can be used even when oscillation is stopped
<Peripheral interface block>
 GPIO ports
37 ports maximum
(Shared with other functions. Some part of pins can be used even when the clock is halted)
 External interrupt pins 4 pins maximum (Shared with other functions)
 Serial interface
SIO
clock synchronized full duplex (3 lines)
3 channels
UART
full duplex
2 channels
IIC
master function
1 channel
<Program memory block>
 Program memory for the internal sequencer built-in
Program version up from the external media (USB and etc.) or main controller is available.
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