MN89201 Datasheet, PDF (10/11 Pages) Panasonic Semiconductor – VGA-NTSC Scan Converter

MN89201
Application Circuit Example
For Information Equipment
16
SA
Address
decoder
AEN
RA0
RA1
RA2
RA3
XRD
MN89201
8
YOUT
CROUT ⁸
CBOUT ⁸
XWE
XHSYNC
8
DB
Counters
XVSYNC
8
RIN
XENRST
VGA
8
GIN
8
BIN
XVSYNCIN
1/2nd
frequency
divider
RD2CLK
RDCLK
XHSYNCIN
SEL
DOTCLK
25.175MHz
(VGACLK)
PLL
RESET
VCO1
OSC
Y
C
NTSC
encoder
Notes: Choose the clock frequencies to match the synchronization system for the NTSC encoder. The PLL
uses the VGA XHSYNCIN (31.5 MHz) clock signal for comparison.
The XHSYNC, XVSYNC, and XENRST signals to the NTSC encoder are synchronized with the
VGA outputs.