LUPA-4000-EVAL Cypress Semiconductor Corp, LUPA-4000-EVAL Datasheet - Page 15

• Manufacturer Part Number: LUPA-4000-EVAL
• Manufacturer: Cypress Semiconductor Corp

Specifications of LUPA-4000-EVAL

• Lead Free Status / RoHS Status: Supplier Unconfirmed

X and Y Addressing
To read out a frame, the lines are selected sequentially.
Clock_y and Sync_y signal. The Sync_y signals synchronises the y-addressing and initialises the y-address selection registers. The
start address is the address downloaded in the SPI multiplied by two.
On the rising edge of Clock_y the next line is selected. The Sync_y signal is dominant and from the moment it occurs, the y-address
registers are initialised. If a Sync_y pulse is given before the end of the frame is reached, only a part of the frame is read. To obtain
a correct initialisation, Sync_y must contain at least one rising edge of Clock_y when it is active.
Table 7. Readout Timing Specifications
Document Number: 38-05712 Rev. *F
Symbol
a
b
d
e
g
h
c
f
Voltage averaging
Sync_X-Clock_X
Sync_Y-Clock_Y
Clock_Y-Sync_Y
NoRowSel
Sync_Y
Pre_col
Sh_col
Name
>20 ns
>50 ns
>50 ns
>20 ns
200 ns
Value
>0 ns
>0 ns
>0 ns
Figure 16. X and Y Addressing
Figure 16
gives the timing to select the lines sequentially. This is done with a
As soon as a new line is selected, it must be read out by the
output amplifiers. Before the pixels of the selected line can be
multiplexed onto the output amplifiers, wait for a certain time,
indicated as the ROT shown in
the data stable from the pixels to the output bus before the output
stages. This ROT is in fact lost time and rather critical in a
high-speed sensor. Different timings to reduce this ROT are
explained later in this section.
During the selection of one line, 2048 pixels are selected. These
2048 pixels must be read out by one (or two) output amplifier.
The pixel rate is the double frequency of the Clock_x frequency.
To obtain a pixel rate of 66 MHz, apply a pixel clock Clock_x of
33MHz. When only one analog output is used, two pixels are
output every Clock_x period. When Clock_x is high, the first pixel
is selected; when Clock_x is low, the next pixel is selected.
Consequently, during one complete period of Clock_x two pixels
are read out by the output amplifier.
If two analog outputs are used each Clock-X period one pixel is
presented at each output.
Figure
CYIL1SM4000AA
16. This is the time to get
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