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Circuit Descriptions and List of Abbreviations
In stand-alone mode, the monitor can be controlled via the
Remote Control or via the RS232C port.
DDC1/2B (Display Data Channel, an I
implemented with separate NVMs for the two VGA inputs and
the DVI-D input as well.
OTC Processor
7340
TXD
RXD
RS232
VGA2-TXD
VGA2
VGA2-RXD
(FLEX)
UART
RS232
SWITCH
RS-232-ACT
VGA1-TXD
UART-ACT
VGA1-RXD
TXD-OTC
VGA1
RXD-OTC
VGA1-H
SYNC-ACT
SYNC
VGA1-V
DETECT
RESET
PSU
5V
5V TEST
8V
8V TEST
RC5-IN
RC
RECEIVER
RC-OUT
RC-CNTL
This part describes the Main Control part of the SCAVIO panel
and the interfaces with the software. The control function
consists of the following tasks:
•
Control of external IOs, like fan speed, temperature,
service and RC5,
•
UART communication with Receiver box,
•
RS232 control / communication,
•
Supports the uploading of new SW into the Flash-ROMs,
•
Start-up of monitor and initialisation via I
•
Error detection and storing.
Start-up and Shut-down
The POR signal is not generated on the PSU, but on the
SCAVIO board. This is done with a fully integrated ADM810T
POR chip (item 7517), which senses the 3.3 V coming from the
PSU. The sense level is 3.08 V. During power-up as well as
power-down, this chip will make the RESET signal high. During
on pin 100). If the monitor is in standby, and a proper RC
2
C based protocol) is
7540
SELECT-1
SELECT-2
IO
EXPANDER
SELECT-3
PCF8574
SELECT-4
7812
POWER
MSP-
DOWN
RESET
AUDIO
I2C-1
(MSP)
7383
SAA5801
I2C-1
3V3-STBY
RESET
STANDBY
POWER-OK
5V-TEST
8V-TEST
SERVICE
INPUT
SERVICE_IN
Figure 9-5 Control Part
2
C,
It is also possible to use the RS232C port for software upload
to the PW Scaler and the OTC. The target for downloading is
controlled via a switch in the RS232C path; the switch itself is
controlled by the OTC.
7530
ADC
PDP
CLOCK
GENERATOR
7656
EPLD
OTC
&
&
7510
WP
FLASH ROM
7506
power-up, this signal will be held 'high' until 240 ms after V
has become stable.
During power-down, the system will be reset as soon as the
V
drops below 3.08 V.
CC
Start-up from Standby
When the monitor is in standby mode, it can wake-up in several
ways:
•
When an RC command is received (RC_IN).
•
Detection of H- and/or V-sync on VGA1.
•
Detection of UART communication on VGA1.
•
Detection of RS232 communication.
•
Detection of Service modes.
RC Command Reception
When a RC command is received at the RC receiver on the
LED panel, it will go directly to the RC input of the OTC (RC_IN
command is send, it will wake up.
FM242 AA
9.
TEMP-1
TEMP-2
7430
NVM-WE
NVM
I2C-NVM
OTC
RED-LED
LEDS
GREEN-LED
7605
PW-RESET
PW-START
PW
I2C-2
7500
RAS
CASL
CASH
AC(0:9)
DRAM
DC(0:15)
CL16532099_004.eps
170801
EN 77
CC
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