CYIL1SM0300AA CYPRESS [Cypress Semiconductor], CYIL1SM0300AA Datasheet - Page 26

• Manufacturer Part Number: CYIL1SM0300AA
• Description: LUPA-300 CMOS Image Sensor
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document Number: 001-00371 Rev. *D
The data at the output of the sensor is clocked on the rising
edge of CLK. There is a delay of 3.2 ns between the rising
edge of CLK and a change in DATA<9:0>. After this delay
DATA<9:0> needs 6 ns to become stable within 10% of VDDD.
Readout timing in slave mode
The start pointer of the window to readout is still determined
by the START_X and START_Y registers (as by readout in
master mode). The size of the window in x-direction is also still
determined by the NB_OF_PIX register. The length of the
window in y-direction is determined by the externally applied
integration timing. The sensor cannot know the desired y-size
to readout. It will therefore readout all lines starting from
START_Y. The readout of lines will continue until the user
decides to start the FOT.
Even when the line pointer wants to address non existing rows
(row 481 and higher), the sequencer will continue to run in
normal readout mode. This means that FRAME_VALID
remains high and LINE_VALID is toggled as if normal lines are
readout.
Readout time shorter than integration time
The sensor should be timed according to the formulas and
diagram below:
LINE_VALID
FRAME_VALID
DATA <9:0>
LINE_VALID
CLK
INT_TIME1
FOT
INVALID
Figure 21. DATA<9.0> Valid Timing
Figure 20. FRAME_VALID Timing
4ns
3.2 + 6ns
Reset
VALID
This means that DATA<9:0> is stable for a time equal to the
clock period minus 6 ns. Figure 21 illustrates this.
Note: In slave mode, line valids that occur beyond the desired
image window should be discarded by the user's image data
acquisition system
The controller of the user should take care of this and ignore
the LINE_VALIDs that correspond with non existing lines and
LINE_VALIDs that correspond with lines that are not inside the
desired readout window.
The length of the FOT and ROT is still controlled by the GRAN
register as described in this data sheet.
Readout time longer than integration time
The sensor should be timed according to the formulas and
diagram below:
1. INT_TIME_1 should be brought high at time (read_t - int_t)
2. At time read_t all INT_TIME_x should simultaneous go low
1. INT_TIME_1 should be brought high after a minimum 2 µs
2. At time read_t after the last valid LINE_VALID of the desired
Readout
and preferably immediately after the falling edge of
LINE_VALID.
to start the FOT. This is immediately after the falling edge
of the last LINE_VALID of the desired readout window.
reset time and preferably immediately after the falling edge
of the first LINE_VALID.
window size, all other LINE_VALIDs should be ignored.
3.2ns
INVALID
Integration
6ns
Clk period – 6ns
VALID
CYIL1SM0300AA
INVALID
FOT
Page 26 of 36
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