EN 1429.FM23, FM24, FM33Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Start-up from StandbyI2C bus 1 is a (5 V) device bus, controlled by the OTC, and
When the monitor is in standby mode, it can wake-up in several connected to the following devices:
ways:- PDP.
When an RC command is received (RC_IN).- EPLD.
Detection of H- and/or V-sync on VGA1.- IO expander SCAVIO - PCF8574A.
Detection of UART communication on VGA1.- IO expander PSU - PCF8574A.
Detection of RS232 communication.- ADC - PCF8591.
Detection of Service modes.- Clock generator for PW - FS6377.
- Sound processor MSP3415G.
RC Command Reception- Audio switch TEA6422 (Enhanced version only).
When a RC command is received at the RC receiver on the I2C bus 2 is used for communication with the Pixel Works
LED panel, it will go directly to the RC input of the OTC (RC_IN co-processor (PW). Although the OTC is the main
on pin 100). If the monitor is in standby, and a proper RC controller, it will act in this case as a "slave", since the PW
command is send, it will wake up. can only act as a "master". Before any I2C commands are
The RC commands are routed to the Receiver box via the exchanged, the PW gets an interrupt (PW_START) to
VGA1 connector pin 9 (RC_VGA1), but this loop through indicate that the OTC wants to talk to the PW.
connection is controlled by RC_CNTL. Below is the truth table.I2C bus 3 is a (3.3 V) device bus, controlled by the PW, and
connected to the following devices:
- Video Decoder SAA7118 (Enhanced version only).
Table 9-5 RC Commands overview
- De-interlacer SDA9400 (Enhanced version only).
- ADC/TMDS receiver AD9887.
FTV2.1E-boxFTVRCRC_CNTL
- 3D Comb filter MN8783LSI (optional).
Monitorcommands
I2C bus 4 is a (3.3 V) bus between the OTC its NVM (to
In StandbyIn StandbySend to E-boxLowavoid data corruption).
In StandbyOnBlockedHighI2C bus 5 is a (3.3 V) bus between the PW and its NVM (to
OnIn StandbySend to E-boxLowavoid data corruption).
OnOnSend to E-boxLow
Notes:
The PDP and EPLD are in fact 3.3 V bus devices, but they
Note: All RC commands are direct available on a separate RC-need to be connected to bus 1, since the OTC is the first
out cinch connector (RC_OUT) on the VGA connector panel.controller to be fully operating at start-up. For this reason,
an I2C level shifter (items 7675/76 on diagram SC12) is
H- and/or V-sync Detectionincluded, which converts the 5 V signals into 3V3 and visa
When both H and V sync signals are present on VGA1, there is versa.
a pulse (low) on SYNC_ACT. When only H is present, One of the first commands is to set the clock generator
SYNC_ACT is continuously low. The SW disables the interrupt, (item 7570), else the PW can not start-up.
once an interrupt is received.
RS232/UART
UART Communication DetectionVGA2(FLEX VGA)
4VGA2_TXDRXD-PW
When there is UART communication on VGA1, the UART
11VGA2_RXD
detection circuitry generates on every falling edge a pulse on 12
15PW
UART_ACT. This is a negative going pulse with a width of ? 74HCT
15 pin Sub-D125-C/D
470 us. The first pulse will trigger the main software to check TXD-PW
S4
for the FTV System Protocol (FSP). The SW disables the
74HC4052
interrupt, once an interrupt is received.n.c.
ST232n.c.
RS232
3RXDRXD-OTC
RS232 Communication Detection
When an RS232 connection is made, and communication is TXD
2n.c.OTC
started (pulses on RS232_RXD), RS232_ACT becomes 9 pin Sub-Dn.c.
"high". Via a transistor, RS232_ACT will make SERVICE_IN TXD-OTC
74HCT
low. When the Monitor is operating (+5 V available), this signal 125-A/B
VGA1
4VGA1_TXDS3S2
is made low (in fact it is disabled). S1..S4= control signals
11S1= SELECT_1
12S2= SELECT_2
15VGA1_RXDS3= SELECT_3S4= SELECT_4
Service Mode Detection15 pin Sub-D
It is possible to enter four different Service Modes (provided the CL 26532038_013.epsS1
280302
OTC is still supplied by the +3V3_STBY).
Via the SERVICE_IN signal, which is an ADC input of the OTC, Figure 9-17 RS232/UART
a voltage drop is detected from +3.3 V to V_x.
V_x is a DC voltage, which represents the mode to be entered:
The FM23 monitor is equipped with an RS232 interface. Via a
nine pin Sub-D connector, it is possible to connect a PC for
Table 9-6 Service Mode levelsspecial modes like:
SW download.
Service mode Limits Vx [V] Vx [V]RemarksFactory purposes.
SDM3.0 > Vx > 2.4 ? 2.60382-2 to GNDService.
Professional use.
SAM2.4 > Vx > 1.8 ? 2.00382-4 to GND
A second option is the connection of a so-called ICONN-box for
COMPAIR1.8 > Vx > 1.2 ? 1.40382-6 to GND
Institutional TV (Hotel TV).
RS232 activeVx < 0.8>0.8Plug in RS232,
start programFor communication with the Receiver Box, the UART protocol
is used, because this can handle longer cable distances than
I2C. The (Receiver box) UART is interfaced via a 15 pin Sub-D
I2C
connector (VGA connector). Via this UART connection, the
There are five I2C busses used in the monitor (see also "I2C
F21RE Receiver box and the FM23 Monitor can communicate
Overview" in chapter 6):
(via FSP). By doing so, the monitor will know that there is an |
ACEC
PHILIPS
