Kontron COMe Starterkit Eval T2 - Manual (Page 102)

COM Express Interfaces
2.13.3. VGA Reference Schematics
This reference schematic shows a circuitry implementing a VGA port.
Figure 37: VGA Reference Schematics
PICMG ® COM Express ® Carrier Board Design Guide Draft Rev. 2.0 / December 6, 2013 102/218
VGA_RED_C
DDCK_RC DDCK_C
VCCDDC
VGA_BLU_C
VGA_GRN_C
DDDA_C
VCCDDC_F
HSY_C
DDDA_RC
BYP
VSY_C
VCC_5V0
VCC_CRTESD_5V0
VCC_CRTESD_5V0
VCC_5V0
VCC_5V0
CEX VGA_I2C_DAT
CEX VGA_I2C_CK
CEX VGA_HSYNC
CEX VGA_VSYNC
CEX CB_RESET#
CEX VGA_RED
CEX VGA_GRN
CEX VGA_BLU
Note: Connection between logic GND and
chassis depends on grounding architecture.
Connect GND with chassis on a single point
even this connection is drawn on all schematic
examples throughout this document.
ESD protection Buffering
Note: level shift CRT DDC from 3.3V to 5V
enable with CB_RESET# to prevent leakage
VGA
R227
100k
R227
100k
CN10
10p
CN10
10p
1 2 3 4
5 6 7 8
F11
NANOSMDM075F
F11
NANOSMDM075F
FB98
120R/0.6A
FB98
120R/0.6A
C296
10p
C296
10p
CN11
10p CN11
10p
1 2 3 4
5 6 7 8
D36 BAT54A D36 BAT54A
2 1
3
FB99
120R/0.6A
FB99
120R/0.6A
C297
10p
C297
10p
FB102
50-Ohms@100MHz 3A
FB102
50-Ohms@100MHz 3A
R228 100R R228 100R
FB100
120R/0.6A FB100
120R/0.6A
C292
100n C292
100n
C298
10p
C298
10p
C293
220n
C293
220n
C299
10p
C299
10p
FB101
120R/0.6A
FB101
120R/0.6A
FB96
100R/1A
FB96
100R/1A
FB57 120R/0.6A FB57 120R/0.6A
R125
100k
R125
100k
C300
10p
C300
10p
Q12
BS138
Q12
BS138
C295
220n C295
220n
R229
R1%2K21S02
R229
R1%2K21S02
C294
220n
C294
220n
R230
R1%2K21S02
R230
R1%2K21S02
RN16
150R
RN16
150R
1 3 5 7
2 4 6 8
FB97
50-Ohms@100MHz 3A
FB97
50-Ohms@100MHz 3A
U32
CM2009
U32
CM2009
VCC_SYNC
1
VCC_VIDEO
2
VIDEO1
3
VIDEO2
4
VIDEO3
5
GND
6
VCC_DDC
7
BYP
8
DDC_OUT1
9
DDC_IN1
10
DDC_IN2
11
DDC_OUT2
12
SYNC_IN1
13
SYNC_OUT1
14
SYNC_IN2
15
SYNC_OUT2
16
C301
10p
C301
10p
R194 100R R194 100R
FB58 120R/0.6A FB58 120R/0.6A
J1403A
DSUB HD15
J1403A
DSUB HD15
RED
V1
GREEN
V2
BLUE
V3
ID2
V4
GND
V5
RGND
V6
GGND
V7
BGND
V8
KEY
V9
SGND
V10
ID0
V11
ID1/SDA
V12
HSYNC
V13
VSYNC
V14
ID3/SCL
V15
Q13
BS138
Q13
BS138
C302
10p
C302
10p
FB95 120R/0.6A FB95 120R/0.6A
C303
10p
C303
10p