CYIL1SM1300AA_09 CYPRESS [Cypress Semiconductor], CYIL1SM1300AA_09 Datasheet - Page 16

• Manufacturer Part Number: CYIL1SM1300AA_09
• Description: LUPA-1300 1.3 MPxl High Speed CMOS Image Sensor
• Manufacturer: CYPRESS [Cypress Semiconductor]

Once the information of the selected line is stable the addressing
of the pixels can start. This is done by means of a Sync_x and a
Clock_x pulse in the same way as the Y-addressing. The Sync_x
pulse downloads the address in the address register into the shift
register and connects the first block of 16 columns to the 16
outputs.
In fact on chip is a 32-output bus instead of 16, but on the rising
edge of Clock_x the first 16 columns of the bus are connected to
the output stages. On the falling edge of Clock_x, the last 16
columns of the selected bus are connected to the output stages.
The timing of the x-shift register is comparable with the timing of
the y-shift register, only that the timing is much faster. Again the
synchronization pulse must be high on the rising edge of
Clock_x.
Document Number: 38-05711 Rev. *D
pre_col (short pulse), Norowsel (short pulse), and Sh_col (large pulse).
Figure 16. Reduced Standard ROT by Means of Sh_col Signal.
Reduced Row Overhead Time Timing
The row overhead time is the time between the selection of lines
that one has to wait to get the data stable at the column ampli-
fiers.
This row overhead time is a loss in time, which should be
reduced as much as possible.
Reduced Timing
A straightforward way of reducing the R.O.T is by using a sample
and hold function.
By means of Sh_col the analog data is tracked during the first
200 nsec during the selection of a new set of lines. After 200
nsec, the analog data is stored. The ROT is in this case reduced
to 200 nsec, but as the internal data was not stable yet dynamic
range is lost because not the complete analog levels are reached
yet after 200 ns.
Figure 16
ns-200 ns starting 25 ns after Norowsel. The duration of Sh_col
is equal to the ROT. The shorter this time the shorter the ROT
will be however this lowers also the dynamic range.
shows this principle. Sh_col is now a pulse of 100
CYIL1SM1300AA
Page 16 of 29
[+] Feedback