Specifications

Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 49LC4.1A AA 9.
9.8.2 Functionality
The features available in the Hercules are as follows:
• Treble and Bass Control.
• Surround Sound Effect that includes:
– Incredible Stereo.
– Incredible Mono.
– 3D Sound (not for AV Stereo).
– TruSurround (not for AV Stereo).
– Virtual Dolby Surround, VDS422 (not for AV Stereo).
– Virtual Dolby Surround, VDS423 (not for AV Stereo).
– Dolby Pro-Logic (not for AV Stereo).
• Bass Feature that includes:
– Dynamic Ultra-Bass.
– Dynamic Bass Enhancement.
– BBE (not for AV Stereo).
• Auto-Volume Leveler.
• 5 Band Equalizer.
• Loudness Control.
All the features stated are available for the Full Stereo versions
and limited features for the AV Stereo
9.8.3 Audio Amplifier
The audio amplifier part is very straightforward. Amplification is
done via the integrated power amplifier TDA7297, and delivers
a maximum output of 2 x 15 W_rms. Normal operating supply
is from 6.5 V to 18 V.
Muting is done via the SOUND_ENABLE line connected to pin
13 of the amplifier-IC and coming from the Hercules.
9.8.4 Audio: Lip Sync
The LC4.1A is not equipped with Lip Sync. This is not needed.
9.9 Control
9.9.1 Hercules
The System Board has two main micro-controllers on board.
These are:
• On-chip x86 micro-controller (OCM) from Genesis LCD TV/
Monitor Controller.
• On-chip 80C51 micro-controller from Philips
Semiconductor UOCIII (Hercules) series.
Each micro-controller has it own I2C bus which host its own
internal devices.
The Hercules is integrated with the Video and Audio Processor.
For dynamic data storage, such as SMART PICTURE and
SMART SOUND settings, an external NVM IC is being used.
Another feature includes an optional Teletext/Closed Caption
decoder with the possibility of different page storage depending
on the Hercules type number.
The Micro Controller ranges in ROM from 128 kB with no TXT-
decoder to 128 kB with a 10 page Teletext or with Closed
Caption.
9.9.2 Block Diagram
The block diagram of the Micro Controller application is shown
below.
Figure 9-4 Micro Controller block diagram
HERCULES SCALER
Tuner
ComPair
NVM
Sound
Amp
MUX
NVM
GPROBE for Debug
or ComPair(Scaler)
SDA
SCL
TV_IRQ
TV_SC_COM
+3V3STBY
1407
1406
1405
PC_DET
SD_PCHD_SEL
PC_HD_SEL
POWER_DOWN
LAMP_ON_OFF
PA NEL_PWR_CTL
HD_FILTER
BACK_LIGHT_ADJ1
Flash ROM
83
GPIO2
NVM_WP
IIC BUS 2
93
NVRAM
_SDA
92
NVRAM
_SCL
72
71
187193194
85
(GPIO4)
88
(GPIO5)
89
(GPIO6)
68
(PBIAS)
67
(PPWR)
99
(PWM1)
98
(GPIO11/
PWM0)
78 DDC_SDA_VGA
77 DDC_SCL_VGA
82 GPIO1
81 GPIO0
+3V3STBY
111
GPIO23
90 GPIO7
ROM_ADD0-17
ROM_DATA0-7
5 6 7
103 106 107 108
HIGH or
LOW
level input
IIC BUS1
NVM_WP
Sound_Enable
HREC
RST
Sel IF/
SDM
Status1
Light
Sense
TV_IR
RC
P50_LINE_ITV_IR_SW
EXT_MUTE
Standby
POWER
DOWN
127
P1.4
114
P2.3
116
ADC1
115
ADC0
123
P2.5
97
INT0
102
P0.4
122
P2.4
126
INT2
128
P1.5
SDA 109
SCL 108
INT1 98
P1.1 99
Keyboard
ADC3 120
111
P2.0
104
P0.2
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