VCT 38xxA
ADVANCE INFORMATION
FP Sub-
address
Function
Default
Name
h’2f
YCrCb mode control register
0
YCrCb
bit[6:0]
reserved (set to 0)
bit[7]
1
ADC over-/underflow
(has to be reset after read if used)
bit[8]
bit[9]
0
disable/enable YCrCb
ADC range
0
1
nominal input amplitude (±350 mV)
extented input amplitude (±500 mV)
bit[11:10]
reserved (set to 0)
Note: Activate the YCrCb mode by
− enabling YCrCb
− selecting simple PAL or NTSC M, svhs=1, comb=0 in the std register
− setting cbw=2 in the insel register
Comb Filter
h’27
comb filter control register
CMB_UC
CC
bit[0]
0
1
comb coefficients are calculated for luma/chroma
comb coefficients for luma are used for luma and
chroma
0
bit[1]
bit[2]
0
1
0
1
luma comb strength depends on signal amplitude
luma comb strength is independent of amplitude
reduced comb booster
0
1
DAA
KB
max comb booster
bit[4:3]
bit[6:5]
bit[11:7]
0..3 comb strength for chroma signal
0..3 comb strength for luma signal
0..31 overall limitation of the calculated comb coefficients
3
2
0
KC
KY
CLIM
0
no limitation
31
max limitation (1/2)
Color Processing
h’30
Saturation control
bit[11:0] 0...4094 (2070 corresponds to 100% saturation)
4095 disabled (test mode only)
2070
ACC_SAT
h’39
h’3a
h’dc
amplitude killer level (0:killer disabled)
amplitude killer hysteresis
25 KILVL
5
0
KILHY
TINT
NTSC tint angle, ±512 = ±π/4
DVCO
h’f8
h’f9
crystal oscillator center frequency adjust, −2048 ... 2047
−720 DVCO
crystal oscillator center frequency adjustment value for line-lock mode
True adjust value is DVCO − ADJUST. For factory crystal alignment,
using standard video signal: set DVCO = 0, set lock mode, read crystal
offset from ADJUST register and use negative value for initial center
frequency adjustment via DVCO.
read only ADJUST
h’f7
crystal oscillator line-locked mode, lock command/status
0
XLCK
write: 100
0
read: 0
enable lock
disable lock
unlocked
locked
>2047
h’b5
crystal oscillator line-locked mode, autolock feature. If autolock is
enabled, crystal oscillator locking is started automatically.
400 AUTOLOCK
bit[11:0]
threshold; 0: autolock off
42
Micronas
MICRONAS [ MICRONAS ]
