VDP 313xY
ADVANCE INFORMATION
Table 2–5: I2C control and status registers of the video backend
(Registers are set to ’0’ at reset, default values are recommendations)
I2C Sub
address
Number
of bits
Mode Function
Default Name
(hex)
(hex)
Tube- and Picture-Measurements
7B
6B
9
w v
picture measurement start line
PMST
23
bit[8:0]
(TML+9)..511
first line of picture measurement
9
w v
picture measurement stop line
PMSO
308
bit[8:0]
(PMST+1)..511
last line of picture measurement
7F
25
9
8
w v
w/r
tube measurement line
bit[8:0] 0..511 start line for tube measurement
TML
15
tube and picture measurement control
0
PMC
bit[0]
bit[1]
bit[2]
0/1
0/1
0/1
disable/enable tube measure-
ment
TMEN
80/40 kHz bandwidth for
picture measurement
PMBW
PMEN
disable/enable picture
measurement (writing a ’1’ starts
one measurement cycle)
bit[3]
0/1
0/1
large/small picture measurement
window, will be disabled from
bit[3] in address h’32
PMWIN
OFSEN
bit[4]
measure / offset check for adc
reserved
bit[7:5]
13
16
w/r
white drive measurement control
WDM
bit[9:0]
0..1023 RGB values for white drive beam 512
current measurement
WDRV
bit[10]
bit[11]
reserved
0/1
RGB values for white drive beam
current measurement disabled/
enabled
0
EWDM
8
r
measurement result registers
minimum in active picture
−
18
19
1A
1D
1C
1B
MRMIN
MRMAX
MRWDR
MRCR
MRCG
MRCB
maximum in active picture
white drive
cutoff/leakage red
cutoff/leakage green
cutoff/leakage blue,
read pulse starts tube measure-
ment
36
Micronas
MICRONAS [ MICRONAS ]
