Photon Focus MV-D752-28, User Manual, Page: 29 / 61

MV-D752-28 User’s Manual
REV: 1.0 Page 29/61
Bit 4 activates the automatic switching of factory set camera settings for pre-defined
LinLog values and Skim values. It controls automatic offset compensation when switching
to a high gain (bit 7 register 7) and the activation of the classical logarithmic mode (bit 6
register 6). In Skim mode, an active flag EN_TOGGLE results in automatic switching to a
factory set skim voltage (bits 5/6 register 7). Bit 5 activates the LinLog2 behavior.
Bit 6 register 6 switches the camera to logarithmic mode (classical logarithmic pixel in
non-integrating mode). In this mode,
which is not supported by Photonfocus , a gain
of 4 should be activated, followed by an offset adjustment of the camera. The increased
Fixed Pattern Noise (FPN ~50%) can be removed very effectively by a digital pixel-by-
pixel offset correction (difference image technique, with a dark image as reference). Bits
5 and 7 should not be set in this mode.
Bit 7 register 6 activates the LinLog mode. It is used by the internal state machines to
generate the LinLog characteristic. Consequently, this value toggles between 0 and 1
when the LinLog2 characteristic (EN_LL2_LOG = 1) is active.
Table 14: Camera resolution and special functions
Enable3 Enable2 Function Description
0 0 8 bit Digital gain x 1
0 1 8 bit
LUT 10-to-8
Two user programmable LUT’s
LUT0 factory preset digital gain x 2
LUT1 factory preset digital gain x 4
(See Appendix B)
1 0 10 bit Digital gain x 1
1 1 10 bit LFSR Interface test with Linear Feedback Shift Register
(LFSR)
Table 15: Mode register 1 (Register address REGADDR = 7D = 07H)
Register address 7 - MODE1_REG
bit Name
Description Default
0 HIGH_VB1 = 1
Î
increase current in source VB1 0
1 HIGH_VB2 = 1
Î
increase current in source VB2 0
2 HIGH_VB3 = 1
Î
increase current in source VB3 0
3 CURR_ON = 1
Î
current sources on, = 0
Î
Current sources off 0
4 EN_DUMMY = 1
Î
Dummy line on = 0
Î
Dummy line off 0
5 SKIM_IMAGE0 = 1
Î
Skim voltage 0 on, = 0
Î
Skim voltage 0 off 0
6 SKIM_IMAGE1 = 1
Î
Skim voltage 1 on, = 0
Î
Skim voltage 1 off 0
7 HIGH_GAIN = 1
Î
Gain by 4, = 0
Î
gain by 1 0