IBIS4-A-6600 Datasheet, PDF (20/40 Pages) Cypress Semiconductor – 6.6 MP CMOS Image Sensor

ADVANCE
INFORMATION
IBIS4-A-6600
CYII4SM6600AB
Sequencer and Registers
Figure 3. showed a number of control signals that are needed
to operate the sensor in a particular sub-sampling mode, with
a certain integration time, output amplifier gain, etc. Most of
these signals are generated on-chip by the sequencer that
uses only a few control signals. These control signals should
be generated by the external system:
SYS_CLOCK, which defines the pixel rate (nominal 40 MHz),
Y_START pulse, which indicates the start of a new frame,
Y_CLOCK, which selects a new row and will start the row
blanking sequence, including the synchronization and loading
of the X-register.
The relative position of the pulses will be determined by a
number of data bits that are uploaded in internal registers
through a Serial to Parallel interface (SPI).
Internal Registers
Table 15. shows a list of the internal registers with a short
description. In the next section, the registers are explained in
more detail.
Table 15. List of Internal Registers
Register Bit
0 (0000) 11:0
Name
SEQUENCER register
0
NDR
1:2
NDR_mode
3
RESET_BLACK
4
FAST_RESET
5
FRAME_CAL_MODE
6
LINE_CAL_MODE
7
CONT_CHARGE
8
GRAN_X_SEQ_LSB
9
GRAN_X_SEQ_MSB
10
BLACK
11
1 (0001) 10:0
2 (0010) 11:0
RESET_ALL
NROF_PIXELS
NROF_LINES
3 (0011) 11:0
4 (0100) 7:0
0:3
4:7
5 (0101) 6:0
6 (0110) 7:0
INT_TIME
DELAY
DELAY_PIX_VALID
DELAY_EOL/EOF
X_REG
Y_REG
Description
Selection of mode, granularity of the X sequencer clock, calibration,
Default value <11:0>:"000100000000"
Mode of readout:
NDR = 0: normal readout (double sampling)
NDR = 1: non-destructive readout
4 different modes of non-destructive readout (no influence if NDR = 0)
0 = normal operation
1 = reset of pixels before readout
0 = electronic shutter operation
1 = addressing from both sides
0 = fast
1 = slow
0 = fast
1 = slow
0 = normal mode
1 = 'continuous precharge'
Granularity of the X sequencer clock
0 = normal mode
1 = disconnects column amplifiers from busses, output of amplifier equals
dark reference level
0 = normal mode
1 = continuous reset of all pixels
Number of pixels to count (X direction). Max. 2222/2 (2210 real + 12 dummy
pixels). Default value <10:0>:"01000000000"
Number of lines to count (Y direction).
Max. 3014 (3002 real + 12 dummy pixels).
Default value <11:0>:"101111000110"
Integration time.
Default value <11:0>:"000000000001"
Delay of sequencer pulses
Default value <7:0>:"00000011"
Delay of PIX_VALID pulse
Delay of EOL/EOF pulses
X start position (0 to 98).
Default value <6:0>:"0000000"
Y start position (0 to 137).
Default value <7:0>:"00000000"
Document Number: 001-02366 Rev. *D
Page 20 of 40
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