AD9923BBCZ Analog Devices Inc, AD9923BBCZ Datasheet - Page 20

• Manufacturer Part Number: AD9923BBCZ
• Manufacturer: Analog Devices Inc

Specifications of AD9923BBCZ

• Analog Front End Type: CCD
• Analog Front End Category: Video
• Interface Type: Serial (3-Wire)
• Sample Rate: 36MSPS
• Input Voltage Range: 0.7V
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (typ): 3V
• Operating Supply Voltage (max): 3.6V
• Resolution: 12b
• Number Of Adc's: 1
• Power Supply Type: Analog/Digital
• Operating Temp Range: -25C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 105
• Package Type: CSPBGA
• Number Of Channels: 1
• Lead Free Status / RoHS Status: Compliant

AD9923
Individual HBLK Patterns
The HBLK programmable timing shown in Figure 26 is similar
to CLPOB and PBLK; however, there is no start polarity control.
Only the toggle positions are used to designate the start and end
positions of the blanking period. Additionally, there is a polarity
control register, HBLKMASK, that designates the polarity of the
horizontal clock signals during the blanking period. Setting
HBLKMASK high sets H1 = H3 = low and H2 = H4 = high
during blanking, as shown in Figure 27. As with CLPOB and
PBLK registers, HBLK registers are available in each V-sequence,
allowing different blanking signals to be used with different
vertical timing sequences.
Table 12. HBLK Pattern Registers
Register
HBLKMASK
HBLKALT
HBLKTOGE1
HBLKTOGE2
HBLKTOGE3
HBLKTOGE4
HBLKTOGE5
HBLKTOGE6
HBLKLEN
HBLKREP
HBLKTOGO1
HBLKTOGO2
HBLKTOGO3
HBLKTOGO4
HBLKTOGO5
HBLKTOGO6
HBLK
HD
Length (Bits)
1
3
13
13
13
13
13
13
13
8
13
13
13
13
13
13
HBLKTOGE1
BASIC HBLK PULSE IS GENERATED USING HBLKTOGE1 AND HBLKTOGE2 REGISTERS (HBLKALT = 0)
Range
High/low
0 to 7 alternation modes
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
0 to 4095 pixel location
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HBLKTOGE2
Figure 26. Typical Horizontal Blanking (HBLK) Pulse Placement
Description
Enables different odd/even alternation of HBLK toggle positions
HBLK first toggle position (for even lines only when HBLKALT = 3)
HBLK second toggle position (for even lines only when HBLKALT = 3)
Fifth toggle position, even lines (HBLKSTART when HBLKALT = 4 to 7)
Sixth toggle position, even lines (HBLKEND when HBLKALT = 4 to 7)
HBLK pattern length, only used when HBLKALT = 4 to 7
Number of HBLK pattern repetitions, only used when HBLKALT = 4 to 7
First toggle position for odd lines when HBLKALT = 3 (usually VREPA_3)
Second toggle position for odd lines when HBLKALT = 3 (usually VREPA_4)
Third toggle position for odd lines when HBLKALT = 3 (usually FREEZE1)
Fourth toggle position for odd lines when HBLKALT = 3 (usually RESUME1)
Fifth toggle position for odd lines when HBLKALT = 3 (usually FREEZE2)
Sixth toggle position for odd lines when HBLKALT = 3 (usually RESUME2)
Masking polarity for H1, H3, HL (0 = mask low, 1 = mask high)
HBLK third toggle position (for even lines only when HBLKALT = 3)
HBLK fourth toggle position (for even lines only when HBLKALT = 3)
Rev. 0 | Page 20 of 88
0: disable alternation (HBLKTOGE1 to HBLKTOGE6 registers are used for each line)
1: TOGE1 and TOGE2 odd lines ,TOGE3 to TOGE6 even lines
2: TOGE1 and TOGE2 even lines, TOGE3 to TOGE6 odd lines
3: TOGE1 to TOGE6 even lines, TOGO1 to TOGE6 odd lines (freeze/resume not
available)
4 to 7: HBLKSTART, HBLKEND, HBLKLEN, and HBLKREP registers are used for each
line
Generating Special HBLK Patterns
There are six toggle positions available for HBLK. Normally,
only two of the toggle positions are used to generate the
standard HBLK interval. However, additional toggle positions
can be used to generate special HBLK patterns, as shown in
Figure 28. The pattern in this example uses all six toggle
positions to generate two extra groups of pulses during the
HBLK interval. By changing the toggle positions, different
patterns can be created.
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