Rev. 1.0, 02/00, page 785 of 1141
CVin2
Csync
a
1
1
0
0
b
a
b
Hsync
Vsync
VLPF
Vsync/VLPF
Csync/Hsync
Hsync
Vsync
External
SW3
Internal
SW5
Internal
SW6
External
SW2
External
SW1
Reference
voltage switch
Register
control
I/O switch
I/O
switch
Polarity
switch
Polarity
switch
Digital H
separation
counter
DLPFON
Digital V
separation
counter
Csync polarity
Schmitt circuit
Vsync polarity
Schmitt circuit
External circuit
Inside LSI
Csync
separation
comparator
External
SW4
CVin2
CCMPSL
CCMPV0, 1
SYNCT
VSEL
SEPV
SEPH
–
+
Sync tip
clamp
Figure 27.15 Sync Source Selection When Using the CVin2 Signal and
the Vsync Schmitt Circuit
Source
Signal
Vsync
Detection
External
SW1
External
SW2
External
SW3
External
SW4
CCMPSL
(Internal
SW5)
VSEL
(Internal
SW6)
Csync/
Hsync
Terminal
I/O
CVin2
input
Vsync
Schmitt
Off
On
a
a
0
0
Output