ADVANCE INFORMATION
VPC 323xD, VPC 324xD
Table 3–3: Control Registers of the Fast Processor that are used for the control of DDP 3300A
– this function is only available in the 50 Hz version (VPC 324xD)
– default values are initialized at reset
– * indicates: register is initialized according to the current standard when SDT register is changed
FP Sub- Function
address
Default
Name
FP Display Control Register
(0...1023)
White Drive Green (0...1023)
White Drive Blue (0...1023)
h’130
h’131
h’132
h’139
White Drive Red
700
700
700
WDR 1)
WDG 1)
WDB 1)
IBR
Internal Brightness, Picture (0 ..511), the center value is 256, the range 256
allows for both increase and reduction of brightness.
h’13c
Internal Brightness, measurement (0...511), the center value is 256,
the brightness for measurement can be set to measure at higher cutoff
current. The measurement brightness is independent of the drive val-
ues.
256
IBRM
h’13a
h’13b
Analog Brightness for external RGB (0...511), the center value is 256,
the range allows for both increase and reduction of brightness.
256
350
ABR
ACT
Analog Contrast for external RGB (0...511)
1) The white drive values will become active only after writing the blue value WDB, latching of new values is indi-
cated by setting the MSB of WDB.
FP Display Control Register, BCL
h’144
h’142
h’143
h’145
h’105
BCL threshold current, 0...2047 (max ADC output ~1152)
BCL time constant 0...15 →13 ... 1700 msec
BCL loop gain. 0..15
1000
15
0
BCLTHR
BCLTM
BCLG
BCL minimum contrast 0 ...1023
307
0
BCLMIN
BCLTST
Test register for BCL/EHT comp. function, register value:
0
1
normal operation
stop ADC offset compensation
x>1 use x in place of input from Measurement ADC
FP Display Control Register, Deflection
h’103
h’102
interlace offset, –2048 ...2047
This value is added to the SAWTOOTH output during one field.
0
7
INTLC
DSCC
discharge sample count for deflection retrace,
SAWTOOTH DAC output impedance is reduced for DSCC lines after
vertical retrace.
h’11f
vertical discharge value,
–1365
DSCV
SAWTOOTH output value during discharge operation, typically same
as A0 init value for sawtooth.
h’10b
h’10a
EHT (electronic high tension) compensation coefficient, 0...511
0
EHT
EHT time constant. 0 ..15 → 3.2 ...410 msec
15
EHTTM
Micronas
47
MICRONAS [ MICRONAS ]
