Singmai Electronics PT9, Руководство пользователя

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SingMai Electronics
PT9 User Manual Revision 0.3 Page 22 of 38
Register
Offset
Register Name R/W Bit Value Description
$20 Broad2 end 2 R/W depending on the line standard (525 or 625 respectively). Halfline
start – Broad 2 end * 1/27MHz is the equalizing pulse width,
nominally 27.3us. 11 bit value = (Broad2end2[2:0],Broad2end1[7:0])
$21 Burst gate start 1 R/W Beginning of the burst gate signal Increments of 1/27MHz.
Maximum value = 1715 or 1727 depending on the line standard (525
or 625 respectively).. Burst gate nominally starts 5.64us after
Hsync start. 11 bit value =
(Burstgatestart2[2:0],Burstgatestart1[7:0])
$22 Burst gate start 2 R/W
$23 Burst gate end 1 R/W End of the burst gate signal Increments of 1/27MHz. Maximum
value = 1715 or 1727 depending on the line standard (525 or 625
respectively). Width of burst gate pulse = Burstgatestart-
Burstgateend * 1/27MHz, nominally 2.25us. 11 bit value =
(Burstgatestart2[2:0],Burstgatestart1[7:0])
$24 Burst gate end 2 R/W
$25 FSc1 R/W LSB of the 32 bit subcarrier seed word.
$26 FSc2 R/W The subcarrier seed word is calculated by the formula:
FSc/27MHz * 2^32. For example for NTSC (FSc = 3.5795455) seed =
569408550
10
or 21F07C26
16
. (FSc4=$21, FSc3=$F0, FSc2=$7C,
FSc1=$26).
$27 FSc3 R/W
$28 FSc4 R/W MSB of the 32 bit subcarrier seed word.
$29 NTSC Hue 1 R/W Hue control for NTSC output only.
11 bit value = (NTSCHue2[2:0],NTSCHue1[7:0]).
1 LSB = 0.176deg.
$2A NTSC Hue 2 R/W
Proc-amp control
$2B Sync Scaling 1 R/W Output composite sync level, nominally Sync scaling = 256 results
in sync output between 16 (sync bottom) and 256 (sync top).
9 bit value = (SyncScaling2[0],SyncScaling1[7:0]).
$2C Sync Scaling 2 R/W
$2D Burst Scaling 1 R/W Burst amplitude.
9 bit value = (BurstScaling2[0],BurstScaling1[7:0]).
$2E Burst Scaling 2 R/W
$2F UV Scaling 1 R/W Output chrominance level.
11 bit value = (UVScaling2[2:0],UVScaling1[7:0]).
$30 UV Scaling 2 R/W
$31 Sync Offset 1 R/W Offset value for the CVBS output, effectively the level of the sync
bottom.
9 bit value = (SyncOffset2[0],SyncOffset1[7:0]).
$32 Sync Offset 2 R/W
$33 VBI Scaling 1 R/W Scaling between BT656 Y data and composite Y output, applied
during the VBI interval.
10 bit value = (VBIScaling2[1:0],VBIScaling1[7:0]).
$34 VBI Scaling 2 R/W
$35 Y Pedestal R/W Pedestal level added during active video period (NTSC-M and PAL-
M only).
$36 Y Offset 1 R/W Value to be subtracted from the BT656 luma input, normally value
64 (10 bit value).
9 bit value = (YOffset2[0],YOffset1[7:0]).
$37 Y Offset 2 R/W
$38 Luma Scaling 1 R/W Scaling between BT656 Y data and composite Y output, applied
during the active picture area, nominally 560/940 * 1023.
10 bit value = (LumaScaling2[1:0],LumaScaling1[7:0]).
$39 Luma Scaling 2 R/W
$3E CVBS gain 1 R/W Composite video gain (used for matching to output stage).
9 bit value = (CVBSgain2[0],CVBSgain1[7:0]).
$3F CVBS gain 2
Table 7 Register descriptions