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3.11.4. Voice DSP (Fortemedia_FM31-39X)
FM31-39X has the ability of communication to the host system either through I2S(Inter-IC-Sound) or
PCM(Pulse Code Modulation) interfaces.
The microphone input is captured through digital microphone Interface, passed through FM31-39X digital
voice processor and the processed data output to the host system.
This SOC includes a high performance and low power DSP(Digital Signal Processor) that comes with a
hardware accelerator, an internal ROM and a RAM. The new BrightVoiceTM processing Technology enhances
the playback intelligibility of the far side voice by monitoring the local ambient noise and enhancing the
speaker output
1.4 Internal Hardware Block Diagram
VCPD
(2pins)
PDMDATA
MIC 0
MIC 1
PDMCLK
Digital
Microphone
Module
1.5 System Application Block Diagram
LGE Internal Use Only
VSS
(2pins)
VDDC
VDDIO
Power Switch
FM31-39X
16
Digital Filters
16
fs
PLL
VSSP
VDDP
Figure 2: FM31-39X Hardware Block Diagram
PDMDATA
MICin
MIC0
PDMCLK
MIC1
TxDC
Preliminary Data Sheet
2
2
2
I
S
Hardware
or
Accelerators
PCM
Mode
Controls
Voice Processor
&
Bright Voice
Engine
SHI
RAMs
ROMs
Clock Generator
FM31-39X
Digital
Voice Processor
&
- 47 -
Copyright © 2011 LG Electronics. Inc. All right reserved.
Bright Voice ™
Engine
3. TECHNICAL BRIEF
FM31-39X
FSC/LRCK
BCLK
GPIO
TEST
RST#
PWDN#
BP#
SCL
SDA
MCLK
MCLK
SHI/Ctrls
Mobile
Application
TxDP
Processor
Only for training and service purposes
(I
S/PCM)
2
or
3G Baseband
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