Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 69
LC4.5E AA
9.
9.9.3
Basic Specification
The Micro Controller operates at the following supply voltages:
•
+3.3 V
DC
at pins 4, 88, 94, and 109.
•
+1.8 V
DC
at pins 93, 96, and 117.
•
I
2
C pull up supply: +3.3V
DC
.
9.9.4
Pin Configuration and Functionality
The ports of the Micro Controller can be configured as follows:
•
A normal input port.
•
An input ADC port.
•
An output Open Drain port.
•
An output Push-Pull port.
•
An output PWM port.
•
Input/Output Port
The following table shows the ports used for the L04 control:
Table 9-1 Micro Controller ports overview
The description of each functional pin is explained below:
•
LED.
This signal is used as an indication for the Stand-by,
Remote and Error Indicator. Region diversity:
–
During protection mode, the LED blinks and the set is
in stand-by mode.
–
During error conditions it blinks at a predefined rate.
–
After receiving a valid RC-5 or local keyboard
command it flashes once.
–
For sets with error message indication, the LED blinks
when message is active and the set is in stand-by
mode.
•
SCL.
This is the clock wire of the two-wire single master bi-
directional I
2
C bus.
•
SDA.
This is the data wire of the two-wire single master bi-
directional I
2
C bus.
•
STANDBY.
The Hercules generates this signal. This can
enable the power supply in normal operation and disable it
during Stand-by. It is of logic “high” level (3.3 V) under
normal operation and “low” (0 V) during Stand-by.
•
IR.
This input pin is connected to an RC5 remote control
receiver.
•
SEL-IF.
This is an output pin to switch the Video SAW filter
between M system and other systems.
–
0: NTSC M (default)
–
1: PAL B/G, DK, I, L
•
NVM_WP.
The global protection line is used to enable and
disable write protection to the NVM. When write to the NVM
is required, pin 7 of the NVM must be pulled to logic ‘0’ first
(via Write_Protect of the micro-controller pin) before a write
operation is performed. Otherwise pin 7 of NVM must
always be at logic “1”
–
0: Disabled
–
1: Enabled (default)
•
SOUND_ENABLE.
This pin is used to MUTE the (push-
pull) audio amplifier.
•
STATUS_1.
This signal is used to read the status of the
SCART 1 input.
•
STATUS_2.
This signal is used to read the status of the
SCART 2 input.
•
HERC_RESET.
This pin is use to switch the +1.8V supply.
•
POWER_DOWN. The power supply generates this signal.
Logic “high” (3.3 V) under normal operation of the TV and
goes “low” (0 V) when the Mains input voltage supply goes
below 70 V
AC
.
•
Keyboard. Following are the Keyboard functions and the
step values (8 bit) for it.
Table 9-2 Local keyboard values
•
TV_IRQ.
This signal is the interrupt from the Scaler IC.
•
TV_SC_COM.
This signal is used for the communication
with the Scaler IC.
•
EXT_MUTE.
This signal is used to reduce the Switch-off
plop.
Pin
Name
Description
Configuration
97
INT0/ P0.5
IR
INT0
98
P1.0/ INT1
TV_IRQ
INT2
99
P1.1/ T0
TV_SC_COM
P1.1
102
P0.4/ I
2
SWS
EXT_MUTE
P0.4
103
P0.3/ I
2
SCLK
Lip Sync
I
2
SCLK
104
P0.2/ I
2
SDO2
NVM_WP
P0.2
105
P0.1/ I
2
SDO1
Lip Sync
I
2
SDO1
106
P0.0/ I
2
SDI/O
Lip Sync
I
2
SDI/O
107
P1.3/ T1
PC-TV_LED
P1.3
108
P1.6/ SCL
SCL
SCL
109
P1.7/ SDA
SDA
SDA
111
P2.0/ TPWM
SOUND_ENABLE
P2.0
112
P2.1/ PWM0
(for future use)
-
113
P2.2/ PWM1
(for future use)
-
114
P2.3/ PWM2
SEL_IF
P2.3
115
P3.0/ ADC0
Light Sensor - SDM
ADC0
116
P3.1/ ADC1
STATUS_1
ADC1
119
P3.2/ ADC2
STATUS_2
ADC2
120
P3.3/ ADC3
KEYBOARD
ADC3
122
P2.4/ PWM3
STANDBY
P2.4
123
P2.5/ PWM4
(for future use)
-
126
P1.2/ INT2
(for future use)
-
127
P1.4/ RX
HERC_RESET
-
128
P1.5/ TX
POWER_DOWN
P1.5
Function
Voltage
(V
DC
)
Step values (8
bit)
NAFTA Stand-by
0
0 - 6
Ch +
0.43
7 - 33
Exit Factory (Ch- and Vol-) 0.69
34 - 53
Ch -
0.93
54 - 73
Menu (Vol - and Vol +)
1.19
74 - 96
Vol -
1.49
97 - 121
DVD Eject
1.8
122 - 147
Vol +
2.12
148 - 169
