Multimedia ICs
•Pin descriptions
Pin No. Pin name
Function
1 Red 1 input Color signal R1 input
2
HD Sync signal Detecting phase of the synchronization
detector signal detector circuit
3 Green 1 input Color signal G1 input
4
Ground
Ground
5 Blue 1 input Color signal B1 input
6
Ground
Ground
7 Red 2 input Color signal R2 input
8
Ground
Ground
9 Green 2 input Color signal G2 input
10
Ground
Ground
11 Blue 2 input Color signal B2 input
12 VD 1 input Vertical synchronization signal VD1 input
13 VD 2 input Vertical synchronization signal VD2 input
BA7657F / BA7657S
Pin No. Pin name
Function
14
VD output Vertical synchronization signal VD output
15 Blue output Color signal B output
16
Control
Control (high = IN1, low = IN2)
17
Composite sync
output
Synchronization signal output
18
Composite video Composite signal input
input
(Sync on Green)
19 Green output Color signal G output
20
VCC
Power supply
21 Red output Color signal R output
22
HD output Horizontal synch. signal HD output
23 HD 2 input Horizontal synch. signal HD2 input
24 HD 1 input Horizontal synch. signal HD1 input
•Output selection setting table
CTL
R
G
B
HD
VD
H
IN1 IN1 IN1 IN1 IN1
L
IN2 IN2 IN2 IN2 IN2
•Input / output circuits
R. G. B input
R. G. B output
HD. VD input
VCC
6.8k
1, 3, 5
100
7, 9, 11pin
21k
1k
VCC
50
400 5mA
15, 19, 21pin
12, 13
1k
23, 24pin
50k
VCC
35k
15k
3