Altera LCD Multimedia HSMC - Manual (Page 38)

Altera Corporation 2–30
August 2008 LCD Multimedia HSMC
Board Components and Interfaces
Figure 2–16. VGA/DAC Interface Schematic
Clocking
Circuitry The board has a number of dedicated clock oscillators that are used for
system timing or timing of specific peripheral chips. A list of these
oscillators is shown in
Table 2–23 below.
VGA_G0
VG
A
_
B
0
VG
A_
R
9
VG
A
_
B
3
VG
A
_
B
2
VG
A
_
B
1
VG
A
_
B
7
VG
A
_
B
6
VG
A
_
B
5
VG
A
_
B
4
VG
A
_
B
9
VG
A
_
B
8
VG
A_
R
8
VG
A_
R
4
VG
A_
R
5
VG
A_
R
6
VG
A_
R
7
VG
A_
R
0
VG
A_
R
1
VG
A_
R
2
VG
A_
R
3
VGA_G2
VGA_G1
VGA_G5
VGA_G4
VGA_G3
VGA_G8
VGA_G7
VGA_G6
VGA_G9
VGA_G
RSET
VGA_R
VGA_B
VGA_G[0..9]
VGA_B[0..9]
VGA_SYNC
VG
A
_
C
L O
C
K
VGA_HS
VGA_VS
VGA_BLANK
VGA_R[0..9]
VGA_AVCC
VGA_AVCC
VGA_AVCC
VGA_AGND
VGA_AGND VGA_AGND VGA_AGND
R70
75
R70
75
R74 47 R74 47
BC43
0.1U
BC43
0.1U
R71
75
R71
75
BC44
0.1U
BC44
0.1U
R72
75
R72
75
R68 4.7K R68 4.7K
10
11
6
1
5 15
J12
VGA
10
11
6
1
5 15
J12
VGA
5
9
4
8
3
7
2
6
1
17 16
10
11
12
13
14
15
R69 560 R69 560
R73 47 R73 47
U9
ADV7123
U9
ADV7123
G6 7
SYNC 12
G1 2
G2 3
B7
21
B8
22
B9
23
CL
O
C
K
24
GND 25
GND 26
IOB 27
IOB 28
B3
17
B4
18
B5
19
B6
20
B2
16
B1
15
B0
14
VA
A
13
G0 1
G3 4
BLANK 11
G9 10
G4
5
G5 6
G7 8
G8 9
VAA 29
VAA 30
IOG 31
IOG
32
IOR 33
IOR 34
COMP 35
VREF 36
RS
E
T
37
PS
AVE
38
R0
39
R1
40
R2
41
R3
42
R4
43
R5
44
R6
45
R7
46
R8
47
R9
48
Table 2–23. Oscillators
Board Reference
Device
Description
Manufacturer
Manufacturer Part
Number
Manufacturer
Website
Y1 25MHz, 25ppm,
CL=15pF, 3.3V,
Size:5*7*1.4 mm Mercury Electronics FH3SWO-AT-25.000 www.mecxtal.com
Y2 100MHz, 25ppm,
CL=15pF, 3.3V,
Size:5*7*1.4 mm Mercury Electronics FH3SWO-AT-100.000 www.mecxtal.com
Y3 28MHz, 25ppm,
CL=15pF, 3.3V,
Size:5*7*1.4 mm Mercury Electronics FH3SWO-AT-27.000 www.mecxtal.com