AD9948KCP Analog Devices Inc, AD9948KCP Datasheet - Page 17

• Manufacturer Part Number: AD9948KCP
• Description: IC CCD SIGNAL PROCESSOR 40-LFCSP
• Manufacturer: Analog Devices Inc
• Type: CCD Signal Processor, 10-Bitr

Specifications of AD9948KCP

• Rohs Status: RoHS non-compliant
• Input Type: Logic
• Output Type: Logic
• Interface: 3-Wire Serial
• Mounting Type: Surface Mount
• Package / Case: 40-LFCSP
• Current - Supply: -

Register
SCP
SPTR
GENERATING SPECIAL HBLK PATTERNS
Six toggle positions are available for HBLK. Normally, only
two of the toggle positions are used to generate the standard
HBLK interval. However, the additional toggle positions may be
used to generate special HBLK patterns, as shown in Figure 11.
The pattern in this example uses all six toggle positions to
generate two extra groups of pulses during the HBLK inter-
val. By changing the toggle positions, different patterns can
be created.
Horizontal Sequence Control
The AD9948 uses sequence change positions (SCPs) and sequence
pointers (SPTRs) to organize the individual horizontal sequences.
Up to four SCPs are available to divide the readout into four
separate regions, as shown in Figure 12. The SCP 0 is always hard-
coded to Line 0, and SCP1–SCP3 are register programmable.
During each region bounded by the SCP, the SPTR registers
REV. 0
H1/H3
HBLK
HD
H1/H3
H2/H4
HBLK
H2/H4
H1/H3
Table XIV. Horizontal Sequence Control Parameters for CLPOB, PBLK, and HBLK
Length
12b
2b
TOG1
SPECIAL H-BLANK PATTERN IS CREATED USING MULTIPLE HBLK TOGGLE POSITIONS.
THE POLARITY OF H1 DURING BLANKING IS PROGRAMMABLE (H2 IS OPPOSITE POLARITY OF H1).
. . .
. . .
Range
0–4095 Line Number
0–3 Sequence Number
Figure 11. Generating Special HBLK Patterns
Figure 10. HBLK Masking Control
TOG2
TOG3
–17–
designate which sequence is used by each signal. CLPOB, PBLK,
and HBLK each have a separate set of SCPs. For example,
CLPOBSCP1 will define Region 0 for CLPOB, and in that region,
any of the four individual CLPOB sequences may be selected with
the CLPOBSPTR register. The next SCP defines a new region,
and in that region each signal can be assigned to a different
individual sequence. The sequence control registers are sum-
marized in Table XIV.
External HBLK Signal
The AD9948 can also be used with an external HBLK signal. Set-
ting the HBLKDIR register (Address x040) to high will disable the
internal HBLK signal generation. The polarity of the external
signal is specified using the HBLKPOL register, and the mask-
ing polarity of H1 is specified using the HBLKMASK register.
Table XV summarizes the register values when using an external
HBLK signal.
Description
CLOB/PBLK/HBLK SCP to Define Horizontal Regions 0–3.
Sequence Pointer for Horizontal Regions 0–3.
TOG4
TOG5
TOG6
. . .
. . .
AD9948