Apalis Carrier Board Design Guide
Toradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l
l
Page | 36
2.6.3.2
VGA DAC Schematic Example
The Apalis standard features a dedicated VGA interface. Nevertheless, it is possible to add a
parallel RGB to VGA converter if an additional VGA interface is needed or a specific Apalis module
does not feature VGA output at the VGA pins. For additional information about the availability of a
dedicated VGA interface and whether it is independent from the parallel RGB interface, please
consult the applicable Apalis module datasheet.
Figure 31: VGA DAC reference schematic
2.6.3.3
LVDS Transmitter Schematic Example
As EMC compliance, if using the parallel RGB interface becomes problematic, it is recommended to
attach liquid crystal displays with high resolutions using a LVDS interface. LVDS also reduces
problems with long cables. The Apalis standard features a dedicated LVDS LCD interface. If the
provided LVDS interface is incompatible with the display or an additional interface is needed, a
parallel RGB to LVDS transmitter can be placed on the carrier board. Please consult the Apalis
module to determine whether the dedicated LVDS interface is independent from the parallel RGB
interface.
As there are different LVDS color mappings available, check with your display vendor on how the
RGB signals need to be connected to the transmitter.
22uF
10V
+C13
VGA_BLUE_C
VGA_GREEN_C
VGA_RED_C
GND
SHIELD2
100nF
16V
C6
560R
R42
100nF
16V
C5
10nF
25V
C14
100nF
16V
C15
10nF
25V
C16
100nF
16V
C17
10nF
25V
C18
100nF
16V
C19
VGA_BLUE
VGA_GREEN
VGA_RED
ADV7125KSTZ140
G
N
D
1
G
N
D
2
G
N
D
1
4
G
N
D
1
5
G
N
D
2
5
G
N
D
2
6
G
N
D
3
9
G
N
D
4
0
G0
3
G1
4
G2
5
G3
6
G4
7
G5
8
G6
9
G7
10
B0
16
B1
17
B2
18
B3
19
B4
20
B5
21
B6
22
B7
23
R0
41
R1
42
R2
43
R3
44
R4
45
R5
46
R6
47
R7
48
BLANK#
11
SYNC#
12
VAA
13
VAA
29
VAA
30
CLOCK
24
IOR-
33
IOR+
34
IOG-
31
IOG+
32
IOB-
27
IOB+
28
C
O
M
P
3
5
RSET
37
PSAVE#
38
V
R
E
F
3
6
IC2
GND
PLACE D1, D2 NEAR THE VGA CONNECTOR
HDR15SN-H
1
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
11
12
13
14
15
10
11
12
13
14
15
X24A
HDR15SN-H
SHIELD
X24B
SHIELD2
47pF
50V
C20
GND
500mA
220R@100MHz
L6
SN74LVC1G17
NC
1
A
2
GND
3
Y
4
VCC
5
IC3
5V_SW
33R
R44
100nF
16V
C21
GND
47pF
50V
C22
GND
500mA
220R@100MHz
L7
SN74LVC1G17
NC
1
A
2
GND
3
Y
4
VCC
5
IC4
5V_SW
33R
R45
100nF
16V
C23
RCLAMP0504S
D2
SHIELD2
RCLAMP0504S
D1
10pF
50V
C7
10pF
50V
C8
GND
600mA
40R@100MHz
L3
10pF
50V
C9
10pF
50V
C10
GND
600mA
40R@100MHz
L4
10pF
50V
C11
10pF
50V
C12
GND
600mA
40R@100MHz
L5
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
SHIELD2
75R
R15
75R
R21
75R
R28
MXM3_243
MXM3_245
MXM3_247
MXM3_249
MXM3_251
MXM3_253
MXM3_255
MXM3_257
MXM3_259
MXM3_261
MXM3_263
MXM3_265
MXM3_269
MXM3_271
MXM3_273
MXM3_275
MXM3_277
MXM3_279
MXM3_281
MXM3_283
MXM3_287
MXM3_289
MXM3_291
MXM3_293
MXM3_295
MXM3_297
MXM3_299
MXM3_301
MXM3_286
MM70-314-310B1
LCD1_PCLK
243
Apalis - Digital RGB
12 of 25
LCD1_VSYNC
245
LCD1_HSYNC
247
LCD1_DE
249
LCD1_R0
251
LCD1_R1
253
LCD1_R2
255
LCD1_R3
257
LCD1_R4
259
LCD1_R5
261
LCD1_R6
263
LCD1_R7
265
LCD1_G0
269
LCD1_G1
271
LCD1_G2
273
LCD1_G3
275
LCD1_G4
277
LCD1_G5
279
LCD1_G6
281
LCD1_G7
283
LCD1_B0
287
LCD1_B1
289
LCD1_B2
291
LCD1_B3
293
LCD1_B4
295
LCD1_B5
297
LCD1_B6
299
LCD1_B7
301
BKL1_ON
286
BKL1_PWM
239
X1L
22R
R10
22R
R11
22R
R12
22R
R16
22R
R17
22R
R18
22R
R19
22R
R20
22R
R22
22R
R23
22R
R24
22R
R25
22R
R26
22R
R27
22R
R29
22R
R30
22R
R31
22R
R32
22R
R33
22R
R34
22R
R35
22R
R36
22R
R37
22R
R38
22R
R39
22R
R40
22R
R41
22R
R13
22R
R14
LCD1_VSYNC
LCD1_HSYNC
LCD1_PCLK
LCD1_R2
LCD1_R3
LCD1_R4
LCD1_R5
LCD1_G6
LCD1_G7
LCD1_G2
LCD1_G3
LCD1_G4
LCD1_G5
LCD1_B6
LCD1_B7
LCD1_B2
LCD1_B3
LCD1_B4
LCD1_B5
LCD1_DE
LCD1_R7
LCD1_R6
BKL1_ON
LCD1_B1
LCD1_B0
LCD1_G0
LCD1_G1
LCD1_R0
LCD1_R1
LCD[0..28]
LCD1_PCLK
LCD1_VSYNC
LCD1_HSYNC
LCD1_R2
LCD1_R3
LCD1_R4
LCD1_R5
LCD1_G6
LCD1_G7
LCD1_G2
LCD1_G3
LCD1_G4
LCD1_G5
LCD1_B6
LCD1_B7
LCD1_B2
LCD1_B3
LCD1_B4
LCD1_B5
LCD1_DE
LCD1_R7
LCD1_R6
BKL1_ON
LCD1_B1
LCD1_B0
LCD1_G0
LCD1_G1
LCD1_R0
LCD1_R1
LCD1_HSYNC_C
LCD1_VSYNC_C
3.3V_SW
3.3V_SW
I2C2_DDC_C[0..1]
V_DISP
1
2
3
JP1
GND
R43
120R
I2C2_DDC_SCL_C
I2C2_DDC_SDA_C
PCA9306DCTT
GND
1
VREF1
2
SCL1
3
EN
8
SDA1
4
SDA2
5
SCL2
6
VREF2
7
IC1
GND
R3
100K
100nF
16V
C2
GND
R5
1.8K
R4
1.8K
500mA
220R@100MHz
L1
500mA
220R@100MHz
L2
4.7pF
C4
4.7pF
C3
R6
1.8K
R7
1.8K
GND
I2C2_SCL
I2C2_SDA
I2C2_DDC_SDA_C
I2C2_DDC_SCL_C
100nF
16V
C1
I2C2_DDC[0..1]
3.3V_SW
22R
R8
22R
R9
MXM3_205
MXM3_207
MM70-314-310B1
Apalis - Display DDC
25 of 25
I2C2_SDA
205
I2C2_SCL
207
X1Y
I2C2_SDA
I2C2_SCL
22R
R1
22R
R2
5V_SW
PIN9
PIN9
BAT54
D3
V_DISP
5V_SW
V_DISP
VGA_BLUE_C
VGA_GREEN_C
VGA_RED_C
LCD1_HSYNC_C
LCD1_VSYNC_C