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NOIL1SM0300A
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. This means that DATA<9:0> is stable for a time
CLK
equal to the clock period minus 6 ns. Figure 22 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
DATA <9:0>
INVALID
VALID
INVALID
VALID
? INVALID
LINE_VALID
4ns
3.2ns
3.2 + 6ns
6ns
Clk period - 6ns
Figure 22. DATA<9.0> Valid Timing
Readout Timing in Slave Mode
The start pointer of the window to readout is 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
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 does not know the
desired y-size to readout. It therefore reads out all lines
starting from START_Y. The readout of lines continues 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 continues to run
in normal readout mode. This means that FRAME_VALID
remains high and LINE_VALID is toggled as if normal lines
are readout.
The controller 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 here:
1. INT_TIME_1 should be brought high at time
(read_t - int_t) and preferably immediately after
the falling edge of LINE_VALID.
2. At time read_t all INT_TIME_x should
simultaneous go low to start the FOT. This is
immediately after the falling edge of the last
LINE_VALID of the desired readout window.
INT_TIME1
FOT
Reset
Readout
Integration
FOT
Readout time shorter than integration time
The sensor should be timed according to the formulas and
diagram here:
1. INT_TIME_1 should be brought high after a
minimum 2 m s reset time and preferably
immediately after the falling edge of the first
LINE_VALID.
2. At time read_t after the last valid LINE_VALID of
the desired window size, all other LINE_VALIDs
should be ignored.
3. After the desired integration length all
INT_TIME_x should simultaneous go low to start
the FOT.
INT_TIME1
FOT
Readout
Reset
Dummy
LINE_VALIDs
Integration
FOT
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