Subaddress 21 (hex 15)

MSB

LSB

RES_CUT

FUF

D5

D4

D3

D2

D1

D0

RES_CUT : Reset of Cut-off Counters and TUBE_COLD bit ; at the same time : stop of cut-off function

0 : cut-off loop active

1 : cut-off loop stopped and Reset of all cut-off counters and TUBE_COLD bit

FUF

: Full Frame Mode (selects cut-off loop operation modus)

0 : cut-off loop is active during the whole frame (adjustment of VG2 on the CRT board in

production)

1 : cut-off loop is active during the first 4 active Video lines : normal mode

D[5..0]

: Drive Register for Red Channel (gain adjustement of the red driver output stage)

R_DRIVE 000000 hex 00) minimal position : 0.33 of maximal value

111111 (hex 3F) maximal position : 3.2VPP at ROUT for contrast = max.,

DRV_GAIN=1 and Y=70 IRE; or DRV_GAIN=0 and Y = 100 IRE

Subaddress 22 (hex 16)

MSB

LSB

VID_OFF

DIS_CUT

D5

D4

D3

D2

D1

D0

VID_OFF : Hard Blanking of Video Output

0 : normal operation

1 : ROUT, GOUT, BOUT is hard blanked, while the cut-off measurement is still active.

DIS_CUT : Disable of Cut-off Loop

0 : Cut-off loop is active.

1 : Cut-off loop is stopped, actual values in the registers are frozen.

Truth - Table for DIS_CUT / FUF

Operation Mode

DIS_CUT

FUF

Video signal present at RGBOUT ; 3 cut-off measurement lines in the lines 21,22,23

0

0

Cut-off measurement during the whole frame with the sequence --> Leakage - Blue, green, red

(repetitive each 4th line)

01

Video signal present at RGBOUT but no cut-off measurement (last values of cut-off counter frozen)

1

0

All Outputs ROUT, GOUT, BOUT hard blanked all the time ; no video ; no cut-off measurement

(useful when TV is switched off --> immediate stop of video output)

11

D[5..0]

: Green Drive Register (gain adjustement of the GREEN driver outputstage)

G_DRIVE

000000 (hex 00) minimal position : 0.33 of maximal value

111111 (hex 3F)

DRV_GAIN=1 and Y=70 IRE; or DRV_GAIN=0 and Y=100 IRE

Subaddress 23 (hex 17)

MSB

LSB

SSC_TRI

FORCE_MUTE

D5

D4

D3

D2

D1

D0

SSC_TRI

: Mode switch for super sandcastle output (only useful in test mode)

0 : SSC Pin delivers super sandcastle output

1 : Super sandcastle output disabled ; Pin SSC can serve as input for PSI and video part

FORCE_MUTE : Test mode for accelerating the test of the PHI1 mute circuit

0 : normal operation ; TV application

1 : PHI1 circuit set to mute ;

ϕ1 forced to free run mode

D[5..0]

: Blue Drive Register (gain adjustement of the blue driver output stage)

B_DRIVE

000000 (hex 00) minimal position : 0.33 of maximal value

111111 (hex 3F)

maximal position :

Y=70 IRE ; or DRV_GAIN=0 and Y=100 IRE

BUS DESCRIPTION (continued)

STV2162

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