ADVANCE INFORMATION
VDP 313xY
Table 2–8: Control Registers of the Fast Processor for control of the video backend functions−default values are
initializied at reset
FP Sub-
address
Function
Default
(hex)
Name
(hex)
FP Display Control Register
130
131
132
139
White Drive Red (0...1023)
700
700
700
WDR 1)
WDG 1)
WDB 1)
IBR
White Drive Green (0...1023)
White Drive Blue (0...1023)
Internal Brightness, Picture (0...511), the center value is 256, the 256
range allows for both increase and reduction of brightness.
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 indepen-
dent of the drive values.
256
IBRM
13A
13B
Analog Brightness for external RGB (0...511), the center value is 256
256, the range allows for both increase and reduction of bright-
ness.
ABR
ACT
Analog Contrast for external RGB (0...511)
350
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
144
142
143
145
105
BCL threshold current, 0...2047 (max ADC output ~1152)
BCL time constant 0...15 ꢀ13 ... 1700 ms
BCL loop gain. 0..15
1000
15
BCLTHR
BCLTM
BCLG
0
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
60
Current BCL reduction (0...1023; read only)
1023
BCLREDUC
FP Display Control Register, Deflection
103
interlace offset, −2048..2047
This value is added to the SAWTOOTH output during one field.
0
7
INTLC
DSCC
102
discharge sample count for deflection retrace,
SAWTOOTH DAC output impedance is reduced for DSCC lines
after vertical retrace.
11F
10B
vertical discharge value,
SAWTOOTH output value during discharge operation, typically
same as A0 init value for sawtooth.
−1365
DSCV
EHTV
EHT compensation vertical gain coefficient, 0...511
0
Micronas
49
MICRONAS [ MICRONAS ]
