MC44011 Datasheet, PDF (46/52 Pages) Motorola, Inc – BUS CONTROLLED MULTISTANDARD VIDEO PROCESSOR

MC44011
APPENDIX B
Suggested Mode Setting Routine (Simplified)
Power On
Set Chroma Registers with
Initial Values
Enable Horizontal Timebase
Set $86–6 = 0
Set Register $00 to $00
Check Horiz Enable Flag
(Flag 11)
RGB Inputs? ^Yes
No
Set $80–7 = 1
Comp Video or ^{Comp Video}
S–VHS?
S–VHS
Set $77–7 and
$77–6 = 1
Set $77–7 and
$77–6 = 0
Select Y, C Inputs with
Bit $88–7
Select Video Input with
Bit $88–7
Leave Y1 Selected
$81–6 = 1
Select Sound Trap
Set $7B–6, 7
Select Luma Peak
Set $7D–7, $7E–6, 7
Select Luma Delay
Set $7F–6, 7, $80–6
Select Sync Source with
Bits $86–7, $87–7, $88–6
Set $80–7 = 0
(Pin 25 must be high)
PAL
Active and Yes
< 576 Lines
Off?
Set PAL Mode with
Bits $7C–7, 6 $7D–6
No
Set NTSC Mode with
Bits $7C–7, 6 $7D–6
Yes
YX Enable?
No
Set $82–6 accordingly
ACC (Flag 23)
Active?
No
Yes
Leave Bit
$7A–7
Select other Crystal,
Bit $7A–7
Select Horizontal Calibration
Frequency Bit $84–6
Check Horiz. Out–of–Lock
(Flag 12)
Open PLL1 H–Switch
$84–7 = 0
Horiz
Out–of–Lock
No
(Flag 12)
Yes
Close PLL1
H–Switch $84–7 = 1
Set PLL1 Gain
Low $83–6 = 0
Horiz
No
Out–of–Lock
(Flag 12)
Yes
Set PLL1 Gain
High $83–6 = 1
Set Vert Decoder to Auto
Countdown (Set $77–0, 1 = 1)
Yes
Y2 Enable?
No
Set $81–7 accordingly
Select Sync Source with
Bit $86–7, $87–7, $88–6
Check Vert Countdown,
engaged after 8 Fields (Flag 15)
Select RGB or YUV
Outputs with Bit $82–1
Pixel Clock
Required?
Yes
No
Leave VCO Off
($7F Register Set to 63)
Set VCO Gain
with $7F Register
Set Oscillator ÷ 2
Output with Bit $85–7
Check Flags 19 & 20.
Adjust $7F Register
as required
Adjust Contrast, Brightness, Trim,
Hue, Saturation and other DACs
as necessary
Monitor Flags on a
continuing basis
46
MOTOROLA ANALOG IC DEVICE DATA