AD9979BCPZ datasheet(19/56 Pages) AD

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AD9979

Rev. C | Page 19 of 56

Name

Length

Range

Description

HBLKTOGO1

13 bits

0 to 8191 pixel location

First HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGO2

13 bits

0 to 8191 pixel location

Second HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGO3

13 bits

0 to 8191 pixel location

Third HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGO4

13 bits

0 to 8191 pixel location

Fourth HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGO5

13 bits

0 to 8191 pixel location

Fifth HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGO6

13 bits

0 to 8191 pixel location

Sixth HBLK toggle position for odd lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGE1

13 bits

0 to 8191 pixel location

First HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGE2

13 bits

0 to 8191 pixel location

Second HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGE3

13 bits

0 to 8191 pixel location

Third HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGE4

13 bits

0 to 8191 pixel location

Fourth HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1.

HBLKTOGE5

13 bits

0 to 8191 pixel location

Fifth HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1

HBLKTOGE6

13 bits

0 to 8191 pixel location

Sixth HBLK toggle position for even lines in HBLK Mode 0 and HBLK Mode 1.

RAxHyREPz1

12 bits

0 to 15 HCLK pulses

HBLK Mode 2 even field Repeat Area x. Number of Hy repetitions for HBLKSTARTz

even lines.2

Bits[3:0]: number of Hy pulses following HBLKSTARTA.

Bits[7:4]: number of Hy pulses following HBLKSTARTB.

Bits[11:8]: number of Hy pulses following HBLKSTARTC.

HBLKSTARTA

13 bits

0 to 8191 pixel location

HBLK Repeat Area Start Position A for HBLK Mode 2.

HBLKSTARTB

13 bits

0 to 8191 pixel location

HBLK Repeat Area Start Position B for HBLK Mode 2.

HBLKSTARTC

13 bits

0 to 8191 pixel location

HBLK Repeat Area Start Position C for HBLK Mode 2.

HBLKALT_PATx3

3 bits

0 to 5 even repeat area

HBLK Mode 2 odd field Repeat Area x pattern. Selected from even field repeat areas.4

1 The variable x represents the repeat area, from 0 to 5. The variable y represents the horizontal driver, 1 or 2. The variable z represents the HBLK repeat area start

position for HBLK Mode 2, A, B, or C.

2 Odd lines defined using HBLKALT_PATx.

3 The variable x represents the repeat area, from 0 to 5.

4 Even lines defined using RAxHyREPz; also see Note 1.

HBLK

HBLK REPEATING PATTERN IS CREATED USING HBLKLEN AND HBLKREP REGISTERS.

H1/H3

H2/H4

HBLKSTART HBLKTOGE1

HBLKTOGE2

HBLKEND

HBLKTOGE3

HBLKTOGE4

HBLKLEN

HBLKREP NUMBER 1

HBLKREP NUMBER 2

HBLKREP NUMBER 3

HBLKREP = 3

Figure 26. HBLK Repeating Pattern Using HBLK Mode 1 (Register Value = 1)

HBLK Mode 1 Operation

Multiple repeats of the HBLK signal can be enabled by setting

HBLKMODE to 1. In this mode, the HBLK pattern is generated

using a different set of registers: HBLKSTART, HBLKEND,

HBLKLEN, and HBLKREP, along with the six toggle positions

(see Figure 26).

Generating HBLK Line Alternation

HBLK Mode 0 and HBLK Mode 1 provide the ability to alternate

HBLK toggle positions on even and odd lines for which separate

toggle positions are available. If even/odd line alternation is not

required, load the same values into the registers for the even

lines (HBLKTOGEx) as the odd (HBLKTOGOx) lines.

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