Datasheet

AD9920A
Rev. B | Page 26 of 112
Table 12. HBLK Pattern Registers
Register
Length
(Bits) Range Description
HBLK_MODE 2 0 to 1 HBLK modes Enables different HBLK toggle position operations.
0 = normal mode; six toggle positions available for even and odd lines.
If even/odd alternation is not needed, set toggles for even and odd lines to the
same value. In addition to the six toggle positions, the HBLKSTART, HBLKEND,
HBLKLEN, and HBLKREP registers can be used to generate HBLK patterns. If even/
odd alternation is not needed, set toggles for even and odd lines to the same value.
1 = advanced HBLK mode; divides HBLK interval into six repeat areas.
Uses HBLKSTARTA/B/C and RAxHxREPA/B/C registers; the latter, depending on the
mode of operation, are stored in the HBLKTOGO1 to HBLKTOGO6 and HBLKTOGE1
to HBLKTOGE6 registers (Address 0x19 to Address 0x1E; see Table 63).
2 = test mode only; do not access.
3 = test mode only; do not access.
HBLKSTART 13 0 to 8191 pixel location Start location for HBLK in HBLK Mode 0 and HBLK Mode 1.
HBLKEND 13 0 to 8191 pixel location End location for HBLK in HBLK Mode 0 and HBLK Mode 1.
HBLKLEN 13 0 to 8191 pixels HBLK length in HBLK Mode 0 and HBLK Mode 1.
HBLKREP 13 0 to 8191 repetitions Number of HBLK repetitions in HBLK Mode 0 and HBLK Mode 1.
HBLKMASK_H1 1 High/low Masking polarity for H1/H3/H5/H7 during HBLK.
HBLKMASK_H2 1 High/low Masking polarity for H2/H4/H6/H8 during HBLK.
HBLKMASK_HL 1 High/low Masking polarity for HL during HBLK.
HBLKMASK_H3P 1 High/low Masking polarity for H3P during 3-phase mode during HBLK.
HBLKTOGO1 13 0 to 8191 pixel location First HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGO2 13 0 to 8191 pixel location Second HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGO3 13 0 to 8191 pixel location Third HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGO4 13 0 to 8191 pixel location Fourth HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGO5 13 0 to 8191 pixel location Fifth HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGO6 13 0 to 8191 pixel location Sixth HBLK toggle position for odd lines in HBLK Mode 0.
HBLKTOGE1 13 0 to 8191 pixel location First HBLK toggle position for even lines in HBLK Mode 0.
HBLKTOGE2 13 0 to 8191 pixel location Second HBLK toggle position for even lines in HBLK Mode 0.
HBLKTOGE3 13 0 to 8191 pixel location Third HBLK toggle position for even lines in HBLK Mode 0.
HBLKTOGE4 13 0 to 8191 pixel location Fourth HBLK toggle position for even lines in HBLK Mode 0.
HBLKTOGE5 13 0 to 8191 pixel location Fifth HBLK toggle position for even lines in HBLK Mode 0.
HBLKTOGE6 13 0 to 8191 pixel location Sixth HBLK toggle position for even lines in HBLK Mode 0.
RA0H1REPA/B/C 12
0 to 15 HCLK pulses for
each A, B, and C
HBLK Repeat Area 0. Number of H1 repetitions for HBLKSTARTA/B/C in
HBLK Mode 1 for even lines; odd lines defined using HBLKALT_PAT.
Bits[3:0]: RA0H1REPA. Number of H1 pulses following HBLKSTARTA.
Bits[7:4]: RA0H1REPB. Number of H1 pulses following HBLKSTARTB.
Bits[11:8]: RA0H1REPC. Number of H1 pulses following HBLKSTARTC.
RA1H1REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 1. Number of H1 repetitions for HBLKSTARTA/B/C.
RA2H1REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 2. Number of H1 repetitions for HBLKSTARTA/B/C.
RA3H1REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 3. Number of H1 repetitions for HBLKSTARTA/B/C.
RA4H1REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 4. Number of H1 repetitions for HBLKSTARTA/B/C.
RA5H1REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 5. Number of H1 repetitions for HBLKSTARTA/B/C.
RA0H2REPA/B/C 12
0 to 15 HCLK pulses for
each A, B, and C
HBLK Repeat Area 0. Number of H2 repetitions for HBLKSTARTA/B/C in
HBLK Mode 1 for even lines; odd lines defined using HBLKALT_PAT.
Bits[3:0]: RA0H2REPA. Number of H2 pulses following HBLKSTARTA.
Bits[7:4]: RA0H2REPB. Number of H2 pulses following HBLKSTARTB.
Bits[11:8]: RA0H2REPC. Number of H2 pulses following HBLKSTARTC.
RA1H2REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 1. Number of H2 repetitions for HBLKSTARTA/B/C.
RA2H2REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 2. Number of H2 repetitions for HBLKSTARTA/B/C.
RA3H2REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 3. Number of H2 repetitions for HBLKSTARTA/B/C.
RA4H2REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 4. Number of H2 repetitions for HBLKSTARTA/B/C.
RA5H2REPA/B/C 12 0 to 15 HCLK pulses HBLK Repeat Area 5. Number of H2 repetitions for HBLKSTARTA/B/C.