Philips BDS4611 Schematic
ChungHwa Picture tubes ,Ltd
OE Business Unit
P D P
Service Menu
Polished by After Service Section
APP Dept. Product Planning Division
First Edition Copyright : Ver_001.
All Rights Reversed
0
Content :
0. Safety measures / Attention…………………….…………………………………
1. Summary …………………………………………………
2. Introduction to PDP circuit boards………………….……………………………
2.1 VIF board ………………………………………………………………………
2.1.1 VIF basic framework………………………………………………………
2.1.2 Photos of VIF Board……………………………………………………….
2.1.3 Pin assignments of connectors ……………………………………………..
2.1.4 VIF (Video interface)……………………………………………………….
2.1.5 System Block diagram………………………………………………………
2.1.6 Some Waveforms…………………………………………………………….
2.2 DIF board ………………………………………………………………………
2.2.1 DIF 2.95 board……………………………………..………………………
2.2.2 Equipments…………………………………………………………………
2.2.3 Simple electric circuit test………………………….………………………
2.2.4 Advanced electric circuit test………………………………………………
2.2.5 IC100 - IC106 :main signal waveform measuring….………………………
2.2.6 Waveform …………………………………………………………………
2.3 POWER board …………………………………………………………………
2.3.1 Introduction ………………………………………….……………………
2.3.2 The output power………………………………………..…………………
2.3.3 pin assignments of connectors…………………………………………….
2.3.4. Troubleshooting…………………………………………………………..
2.4 X-Sustainer board ………………………………………………..……………
2.4.1 X-Sustainer board’s pin alignments ………………………………………
2.4.2 X-side function explanation :………………………………………………
2.5 Y-Sustainer board ………………………………………………………………
2.5.1 Y-Sustainer board’s pin alignments…………………………………………
2.5.2 Y-side function explanation…………………………………………………
3. PDP repairing flow-chart …………………………………………………………
3.1 Main flow-chart………………………………………………………………
3.2 No picture repairing flow-chart………………………………………………
3.3 X sustainer malfunction repairing flow-chart…………………………………
3.4 Y sustainer malfunction repairing flow-chart…………………………………
4. Generally common defective checking and testing…………………………………
4.1 Phenomenon 1 : Dark screen and flickering…………………………………..
4.2 Phenomenon 2 : 170v limit current……………………………………………
1
4.3 Some phenomenon of failure PCB boards……………………………………..
5. Debug / Inspection…………………………………………………………………….
5.1 Debug………………………………………………………………………….
5.2 Inspection………………………………………………………………………
6. Common use of BOM lists …………………………………………………………
7. Repair record: …………………………………………………………………………
2
0. Safety measures and Attentions:
1. Observation and measures carefully：
When in repair service , should pay attention to these safety measures and the description
Of the service menu.。
2.Preparation:
The preparation for repair in a defective PDP is necessary , ex：stable working table , repair
Tools , measuring equipments , replace parts………etc。
3.Pay attention to electrical shock:
Because the PDP is using the AC power source , and the power board contents high voltage ,
so to preventing the high voltage shock is necessary . Such as , using a isolated transformer ,
plastic glove , charged components should be discharged first . The high voltage is supplied
to inferior components , so when repair the PDP should pay more attentions.
4.Using the specified components:
Some components provide fire-resist and endure high-voltage. So when replace these parts
, should use the same characteristic components. So when replace a component should according
to the BOM form for a assigned component.
5.Stable the components and recovery the wiring :
Some components are using isolated sleeve or adhesive tape to isolate from the electric
board . Moreover the interior wiring should be arranged again to prevent the interference
from given out heat components and high voltage components .So after repairing , should
recover the same layout of the PDP.
6.Integrity of the electric circuit :
Use the specified components to replace the defective parts . Under any circumstance，do
not try to modified the electric circuit .
7.Safety check after repairing：
After repairing , should check the screws and the wiring condition .Checking the quality
of repairing components . The insulation test of the metal component , power cord to make
sure the safety of repairing.
3
1 . Summary :
N
1.1 Photos of disassembly:
ote.3
Fig. 1 Fig. 2
1.2 Procedure:
1.First put on the PDP on a stable working table and power off the PDP which is going to repair ,
then using a screwdriver to unfasten the screws which fasten the back cover .
2.Befor taking apart as Fig.1 shown , after taking apart as Fig. 2 shown .
3.The screws of back cover：
a. pan-headed screw M4 ＊13 pcs。
b. screw TB-12 ＊18 pcs。
c. stand screw M5-16 ＊ 4pcs。
1.3 Note:
2.After taking apart , put the screws at a safe place to avoid losing
1.Make sure that the power is off before taking apart .
3.Taking apart and installing the back cover , be careful not to pull out the switch of AC power
switch .(Fig.3)
Fig.3
4
1.4 Introduction to PDP circuit board:
d
)
)
1.4.1The introduction of circuit board at Back board:
Y-Extension
board (upper
and lower
AC Line Filter
Y-SUSTAINER
1.4.2 Explanation：(Function / Characteristic)
POWER SUPPLY
Audio Board
VIF(PC Module &
Video Module)
DIF Boar
X-SUSTAINER
X-Extension
board (upper
and lower
W-Extension board (left
and right)
a. POWER：(1).Input Voltage (AC 110V〜240V、47HZ〜63HZ)，Max. range 90V〜265V.
(2).Providing electrical power to all the PCB.
b. VIF：Transfer S-video , Video , PC(D-sub& DVI) , HDTV signal to digital signal to the DIF
board.
c. DIF：Dealing with the digital signal for output to panel.
d. X-Sustainer / Y-Sustainer：(1).Receiving the signal from DIF.
(2). Output scanning waveform.
e. X / Y-Extension board: Receive signal from X / Y sustainer , output horizontal scanning waveform
to the panel.
f. W-Extension board: Receive signal from DIF , output the vertical scanning waveform , addressing
data.
g. Audio Board：Amplifying the audio signal to the internal or external speakers of which select.
h. AC Line Filter：AC power line filter。
5
1.4.3. PDP 46” block diagram:
pp
W
d
W
Y
Lower
Uppe
Y-
PY
r
Y- S us t ai n er
-
PY PX1 PX2 PW
Key PAD
AC Filter
AC 90~240 V
Panel
POWER
-Board
Audio-AMP
J17
J12
Power CN1
J15 J16 CV1
DIF
V I F
DW1 DW2
J11
DW1 DW2
DX1
-Boar
PX1 PX2
DX1
X-Sustainer
X-U
er
X-Lower
Front Receiver
1.4.4 Function:
a. The input voltage AC 90 ~ 240 through line filter to the power board , after main switch is on
then power board generate 5 volts to VIF board. The VIF board after receiving 5 volts then
from CN connector send signal(5 volts) to power board .Power board generates 5 volts to DIF
and VIF .When VIF receives the 5 volts ,then generates 5 volts to power board through CN
connector(pin1 ,pin6) , and it means that DIF has received 5 volts already.
b. When power on(key-pad or receiver),the VIF send VCC_ON signal to power to start Vcc and
Vf voltage through CN connector(pin2).
c. The VIF sends HV_ON signal to power board to start high voltage Vs , Vxg , Vw through CN
connector(pin4).
d. At the same time the signal from VIF to DIF for signal processing , then through X / Y / W
board to start the screen.
6
1.4.5 The waveform of connector:
a. CN1-V CN1-D:
8bit R [7:0]
8bit G [7:0]
8bit B [7:0]
clock
Hsync
Vsync
Blank (Blank H)
I*2C
a-1. PIN assignment :
PIN No.
Output
1 2 3 4 5 6 7 8 9 10 11
CLK0 CKL1 Gnd BLK Gnd VD Gnd HD Gnd Gnd B7
12 13 14 15 16 17 18 19 20 21 22 23
B6 B5 B4 Gnd B3 B2 B1 B0 Gnd G7 G6 G5
24 25 26 27 28 29 30 31 32 33 34 35
G4 Gnd G3 G2 G1 G0 Gnd R7 R6 R5 R4 Gnd
36 37 38 39 40 41 42 43 44 45
R3 R2 R1 R0 Gnd None TP66 none
Sda/TP5 Scl/TP2
a-2. Signal explanation:
7
b. DX1 to DXS:
b-1 PIN assignment :
PIN No.
Output
1 2 3 4 5 6 7 8 9 10
Gnd
XDD2/TP1
40
XDD1/TP1
39
Gnd
XP2L/TP1
38
XG2L/TP1
37
XG3L/TP1
36
XG1L/TP1
35
Gnd
XG1H/TP
134
11 12 13 14 15 16 17 18 19 20 21
XSU/TP133 XAEL/TP1
52
XEAH/TP
151
Gnd
XELL/TB1
50
XEFH/TP1
49
Gnd
XNEL/TP1
48
XNEH/TP
147
Gnd
XCLK/TP1
46
22 23 24 25 26 27 28 29 30
Gnd
XSI2/TP14
5
Gnd
XLE/TB144 XSTB/TP1
42
XTSC/TP1
41
Gnd
XSI1/TP14
3
Gnd
c. DW1 to DW1(DIF to W board)
Signal：DDR(27.0)、DDG(27.0)、DDB(27.0)、DLE(2.0)、DBL(2.0)、DBH(2.0)、DHZ(2.0)。
PIN No.
Output
1 2 3 4 5 6 7 8 9 10 11
GED YSC2A YSC1A GED YEELA YEEHA GED YEFLA YEFHA GED YCA2B
12 13 14 15 16 17 18 19 20 21 22 23
YSC1B GED YNELB YNEHB GED YEFLB YEFHB GED DDB27 DDG27 DDR27 GED
24 25 26 27 28 29 30 31 32 33 34 35
DDB26 DDG26 DDR26 GED DDB25 DDG25 DDR25 GED DDB24 DDG24 DDR24 GED
36 37 38 39 40 41 42 43 44 45 46 47
DDB23 DDG23 DDR23 GED DDB22 DDG22 DDR22 GED DDB21 DDG21 DDR21 GED
48 49 50 51 52 53 54 55 56 57 58 59
DDB20 DDG20 DDR20 GED DDB19 DDG19 DDR19 GED DDB18 DDG18 DDR18 GED
60 61 62 63 64 65 66 67 68 69 70 71
DDB17 DDG17 DDR17 GED DDB16 DDG16 DDR16 GED DHZ2 DBH2 DBL2 DLE2
72 73 74 75 76 77 78 79 80
GED RAKa GED RAKb GED V50 V50 V50 V50
d. DW2 to DW2 (DIF to W board)
signal：DDR(27.0)、DDG(27.0)、DDB(27.0)、DLE(2.0)、DBL(2.0)、DBH(2.0)、DHZ(2.0)。
PIN N.
Output
1 2 3 4 5 6 7 8 9 10 11
V50 V50 V50 GED DDB15 DDG15 DDR15 DDB14 GED DDG14 DDR14
12 13 14 15 16 17 18 19 20 21 22 23
DDB13 DDG13 GED DDR13 DDB12 DDG12 DDR12 GED DDB11 DDG11 DDR11 DDB10
24 25 26 27 28 29 30 31 32 33 34 35
8
GED DDG10 DDR10 DDB9 DDG9 GED DDR9 DDB8 DDG8 DDR8 GED DHZ1
36 37 38 39 40 41 42 43 44 45 46 47
DBH1 GED DBL1 DLE1 GED GAKa GED DHZ0 DBH0 GED DBL0 DLE0
48 49 50 51 52 53 54 55 56 57 58 59
GED GAKb GED DDB7 DDG7 DDR7 DDB6 GED DDG6 DDR6 DDB5 DDG5
60 61 62 63 64 65 66 67 68 69 70 71
GED DDR5 DDB4 DDG4 DDR4 GED DDB3 DDG3 DDR3 DDB2 GED DDG2
72 73 74 75 76 77 78 79 80
DDR2 DDB1 DDG1 GED DDR1 DDB0 DDG0 DDR0 GED
e. W-COF to Y-Sustainer：
PIN No
Output
PIN No
Output
1 2 3 4 5 6 7 8 9 10
LGED YSC2A YSC1A LGND YNELA YNEHA LGND YEFLA YEFHA LGND
11 12 13 14 15 16 17 18 19 20
LGND YSC2B YSC1B LGND YNELA YNEHA LGND YEFLB YEFHB LGND
9
3
4.
1
3.
3
8.
1
3.
6
21.
0
1.
5
4.
4.5
6
0.
5
4.
0.6
5
4.
I,1 I,2 ............... I,484
Xv
X484
圖 4. 2
X1 X2 ...................
g
W
Y
Ya
Yb
XVDD
LOG2
XSI1
XLE
XSI2
XCLK
XTSC
XSTB
10
3
4.
1
3.
3
8.
1
3.
6
21.
0
1.
4.5
4.5
0.6
4.5
0.6
4.5
X484
X1 X2 ...................
I,1 I,2 ............... I,484
g
Xv
W
Y
*
Yb
Ya
XLFH
XEFL
XNEL
XG1H
XNEH
XG1L*
XG2L
*
XP2L
*
XS
H
U
XAE
XAEL
XDD1
XDD2*
XTSC
圖 4. 1
XSTB
11
12
f. Power signal：Power to Y-Sustainer (PY)：
PIN No.
Symbol Vcc-G Vcc Vf-G Vf Vw Vw-G Vs-G None Vs
Output 5V 5V 15v 15v 65V 65V 170V None 170v
g. Power signal : Power to X-Sustainer (PX1)：
PIN No. 1 2 3 4 5 6 7
Symbol Vf-G Vf Vw Vw-G Vs-G None Vs
Output 15v 15v 65V 65V 170V None 170v
h. Power signal：Power to X-Sustainer (PX2)：
PIN No. 1 2 3 4 5
Symbol Vxg None Vxg-G Vcc Vcc
Output -160V None 15v 15v 65V
1 2 3 4 5 6 7 8 9
2.1 VIF Board:
Summary:
General digital video signals include Vsync、Hsync、R(8Bit)、G(8Bit)、B(8Bit) and Data
Enable(Blank);the VIF of PDP is making for processing these digital signal.
Because PDP belonging a high end product , so its application should include the functions of
monitor(analog VGA , digital DVI signal input). And for consumer’s sake , the VIF should have the
functions of video , like audio , composite , s-video , component signal processing.
Below is the explanation of VIF system:
The role of VIF：
UHF/VHF TV
Cable TV
HDTV
VTR
DVD Player
PC
Home Video Game
DIFVIF
13
Currently the video signal sources are video cassette recorder , DVD player , CATV , RF tuner , VGA
card(PC). In order that all the video signal sources can be displayed on PDP , so we need a interface to
transfer these signals to a specified signals for PDP to display , and this is the function of VIF(Video
Interface).
2.1.1 Basic framework of VIF board
For dealing with the signals of CVBS , S-video and Component, it requires a video decoder IC .
And the output of video decoder will input to a de-interlace chip IC for a stable image quality .
Because the TV system uses interlace scanning , it causes flickers on the screen . To improve this
situation so we use a de-interlace chip IC . The ADC(Analog to Digital Converter) IC converts
the analog RGB signal to digital RGB signal. The TMDS(
decoder IC transmits digital RGB signal. All the output of ICs’ signal send to scalar IC. The
relationship is shown as below , and make a brief explanation of the system.
Transition Minimized Differential Signaling)
D-SUB
ADC
Converter
Scalar
Chip
Out to DIF
DVI
TMDS
Receiver
Y/Cb/Cr
De_
Interlace
S-Video
Composite
Video
Decoder
Micro_
Controller
a. ADC Converter:AD9888 KS
RGB graphics signals. Its 205 MSPS encode rate capability and full-power analog bandwidth of
500 MHz supports resolutions up to UXGA(1600 x1200 @ 75 Hz).
The AD9888 is a complete 8 bit , 205 MSPS monolithic analog interface optimized for capturing
b. TMDS Receiver: SIL153BCT100
The Sil153BCT100 receiver uses PanelLink Digital technology to support high resolution displays up
to SXGA(25MHz~112MHz) . The Sil153B receiver supports up to true color panels (24 bit/pixel,
16.7M colors) in 1 or 2 pixels/clock mode. In addition , the receiver data output is time staggered to
14
reduce ground bounce that affects EMI.
c. VIDEO Decoder:SAA7118E
The SAA7118E decoder is a ADC too , but it can deal with the ordinary TV signals. The
SAA7118E can input Composite (fig.A)、S-video (fig.B)、Component (fig.C) and its outputs
Are digital Y(Luminance) , C(Chromacity) signals. And also can adjust brightness , contrast ,
Saturation , hue .
Fig.A : Composite 信號 for COLOR BAR
Fig.B-1 YY ssiiggnnaall ooff SS--vviiddeeoo
15
g
g
g
g
d
d
i
FFi
..BB--22CCssi
i
nnaallooffSS--vvi
i
o
eeo
FFiigg..CC--11 YY--ssiiggnnaall ooff CCoommppoonneenntt
FFiigg..CC--22 CCbb--ssiiggnnaall ooff CCoommppoonneenntt
16
d. De-interlace:SIL504CM208
FFiigg..CC--33 CCrr--ssiiggnnaall ooff CCoommppoonneenntt
The Sil504 transfer interlacing signals to progressive signals. The advantage of progressive
signals is that the scanning rate doubling to let the screen more stable and non-flickering. Besides, the
sources of input may have 24 0r 30 or 25 frames per sec, so the de-interlaced chip shall tell from the
differences and processing the signals. The basic principle of de-interlaced IC is combined the odd and
even fields to a frame , and the processing needs a memory IC(SDRAM) to store these signals for
processing . For the improving the quality of image sake , more and more TVs or DVD players all
have the functions of progressive scanning.
e. Image Processor chip:PW171-20U(system on chip)
◎ Scaling function :
The Image scalars provide high quality up and down image scaling . For the applications of VIF , the
input signals could be VGA , SVGA , XGA formats , and its output fixed at 852 x 480 @60 HZ . For
example , SVGA format:800 x 600 @75Hz , first scaling down : Horizontal 800Î640、Vertical
600Î480 , 75 frames / sec after frame rate conversion become 60 frames per sec. Then scaling up
640Î852 , to accomplish the scaling function.
◎ Micro Processor Function :
This chip includes microprocessor(on-chip 80x86) ; selectable function and I/O interface control .
With 3 groups of 8-bit programmable I/O , 1 group of RS-232 communication port , IR
decoder ,timer and a PWM generator
17
◎ OSD Function :
3
o/Video
S-VideoY/Cb/Cr
Video Decoder
Switc
V
The on-screen-display(OSD) can be used for startup screens , menus , and scribble functions.
2.1.2 Photos of VIF Board :
a. Video Module:
Audi
b 2nd PC Module:
D Y/C SEP
To VIF Main Board
Audio
To VIF Main Board
h
PC OUT
H B G R
PC Audio IN
18
c. VIF Main Board：
J16
To DIF
J15
SDRAM
J17
Image
Processor
Tone
Control
Reset
SDRAM
J12
De_interlace
To Video/PC Module TMDS
ADC
D-SUB
DVI
2.1.3 Pin assignments of connectors :
a. J12 : Key Pad Signal
NO
ITEM Power Right Left Up Down Menu Input Gnd
b. J11 : Receiver/Indicator Signal
1 2 3 4 5 6 7 8
J11
RS232
NO
ITEM NC Red LED Green LED Gnd Ir_Rcv +5V
1 2 3 4 5 6
19
c. J17 : Audio Signal
NO 1 2 3 4 5 6
ITEM Mute L_Out L_Gnd R_Out R_Gnd
SPK
Int/Ext
d. J16 : Power –Control Signal
NO 1 2 3 4 5 6 7 8 9 10
+5V
ITEM
LV ON NC HV ON NC Gnd Fault Pwloss Fan Gnd
Standby
e. J15 : Power –Supply Voltage
NO 1 2 3 4 5 6 7 8 9
ITEM
+9V
Audio
+9V
Audio
GND GND
+5V
VCC
+5V
GND GND
VCC
f. J9:Output – Out to DIF
1/
SCL
2/
SDA
3/
NC
4/
NC
5/
Status
6/
GND
7/
R-00
8/
R-01
+5V
Standby
9/
R-02
10/
R-03
19/
G-02
28/
B-01
37/
GND
11/
GND
20/
G-03
29/
B-02
38/
H-sync
12/
R-04
21/
GND
30/
B-03
39/
GND
13/
R-05
22/
G-04
31/
GND
40/
V-sync
14/
R-06
23/
G-05
32/
B-04
41/
GND
15/
R-07
24/
G-06
33/
B-05
42/
Blanking
16/
GND
25/
G-07
34/
B-06
43/
GND
17/
G-00
26/
GND
35/
B-07
44/
PixelCLK
18/
G-01
27/
B-00
36/
GND
45/
GND
2.1.4 VIF (Video interface) :
a. When main switch is ON , the power board generates Vsby 5 volts to VIF board. The IC of
microprocessor become standby status waiting for a startup signal from key-pad or receiver.
b. When a startup signal is detected then microprocessor sending a ON signal to the power board
through CN connector , and the power board begins generating all voltage to PCB board(Vs ,
Vxg , Vw , Vf , Vdd , Vcc , 9volts) . At the same time VIF will generate background light and
OSD menu as select .After searching a input source , then will display on the PDP screen , if
there are audio signals , it will amplify and send to speakers through audio board.
c. If there are abnormal signals are detected(such as over voltage , over current , low voltage ..) , the
power board will send abnormal detective signal to shut down all the system.
20
2.1.5 System Block diagram :
2.1.6 Some Waveforms:
J9_42 TP155
Blanking
21
J9_42 TP155
Blanking
J9_40 TP154
Vsync
J9_38 TP152
Hsync
J9_44 TP156
PixelClock
22
2.2. DIF board:
2.2.1 DIF 2.95 board：
DIF 2.95 board :
Fig. 1 The role of DIF board
Fig.2 The photo of a DIF board
23
2.2.2 Equipments：
a. Power : 5V 3A power supply * 1
b Tools:
b-1 Oscilloscope
b-2 PMC
Fig. 3 Oscilloscope with 4 channels
b-3 45 pin FFC connector * 1
b-4 Multi-meter * 1
c. Test flow
c-1 Overall check:
To inspect the DIF board whether broken board occurred , components broken or short
circuit…. etc .
Ex:
(1)
Fig.4 PMC * 1
Fig. 5 Connector short circuit
24
(2)
Fig.5 D to W connector broken
(3)
c-2 Power test:
Make sure that the power is normal without any short circuit happening.
2.2.3 Simple electric circuit test:
Checking all functions of the board is normal.
Test flow as Fig.7 shown.
Fig.6 Wrong DRAM
Fig.7 Test flow
25
** LED : When DIF power on , the LED light on means that the FPGA download OK , at this time the
p
current will be about 1.3A .
a. Waveform testing :
a-1 Make sure that the waveforms of S , X , Y are normal . Repeat reading the data from IC to
make sure the downloading data is normal.
a-2 The Waveform of IC106 : If the waveforms of S , X , Y are normal. Then we can check
the functions of controlling waveforms of IC106.
a-3 Next procedure is going to check the waveform of V、Start、Wp、Wn、SF0~SF3、Esq.
Check Vf , Vf is signal after processing from V. SF0~SF3 , Esq is the setting time and
ending time of the sub-field .
a-4 Check the output of X and Y :
As Fig. 8 shown. Confirm that the waveform is normal.
X : DD1 Waveform
X : DD2 Waveform
Event =15 ,means that
ulse shown at block15
Fig.8 X : DD1 and DD2 output waveform
26
b. Checking the function of APC:
b-1 The data of Adat are normal. Compared with look up table(LUT).
b-2 Checking the power of WAPC , Check the signal of SM and SF0 to make sure the power
WAPC functions OK.
b-3 Check the screen of PDP :
From the screen to check the functions of DIF’s performance is good or not.
c The debug flow chart as Fig.9 shown.
Fig.9 The debug flow chart
2.2.4 Advanced testing and checking:
The DIF board has three major functions.
a. Image signal process:
a-1 Purpose: To check the functions of image signal process are correct.
As Fig.10 shown ,
27
data
buffe
age
source
a
ce
compute
deo
r
vi
Antenna
r
RAM
im
interf
Fig.10 Image signal process
a-2 As Fig.11 Shown , the image signals separated into R , G , B for processing.
Fig.11 Image signal process
a-3 Here we check the input / output signals is correct or not. Compared with the output
and input waveforms of Rx7-Rx0 , Gx7-Gx0 , Bx7-Bx0 are the same or not , and check
the waveforms of Vx , Hx , Blkx , BlkVx , Clkx are normal or not .
a-4 For IC101-103 , IC106 is passing a Wp signal to IC101-103 , as fig.11 image signal
process , IC101-IC103 output signals to panel , so the buffer and extension board ,
connector are checking points too.
a-5 Image process
EX : IC101 –> PANEL Output
IC101
LUT
7-9
8-9
Driver IC
Panel
In IC101 , There are 7 blocks for processing , from system trigging to output signal.
DRAM
28
For example ,the process of VF signal as below shown:
V
The real waveform is as below , the length is 60μS.
VF
V
Fig.12 Real waveform
Ex : IC100 –> IC106
μ-com
VF
SRAM IC104 IC100 PMC
IC106
29
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