STV0672 datasheet(25/105 Pages) STMICROELECTRONICS

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CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000

VV5410 & VV6410

Commercial in confidence

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cd5410-6410f-3-0.fm

7.1.7

Video Timing Parameter

The video timing parameter category comprises all the other shadow/working register pairs. The video timing parameter update

pending flag will be unconditionally set if any of the following registers are written to:

•

Setup0[16]

•

Setup1[17]

•

fg_mode[20]

•

data_format[22]

•

op_format[23]

•

mode_select[24]

•

Dark Pixel Offset[44,45]

•

Dark Pixel Cancellation Setup Register

•

Black Pixel Offset[44,45]

•

Black Pixel Cancellation Setup Register

•

Line Length[82,83]

•

Field Length[97,98]

7.2

Timed Parameter Update Points

The timed parameter categories are updated as follows:

note: We refer to odd and even fields in the Table 9 below. In a video mode like CIF or QCIF the fields are all identical in length,

we still have to be able to differentiate between fields to enable correct updating of register parameters.

The order that the above timed parameters are updated is critical. Let us assume that all the pending flags are set, i.e. we have

written to at least one register in each category. The working registers will be updated in the following order:

1. Coarse exposure

2. Tilt parameters

Timed parameter category

Updated point

ﬁne exposure

Conditional on a change pending in the line length register.

Line length change pending: update ﬁne exposure at the odd to even ﬁeld

transition

Line length change not pending: update ﬁne exposure during the start of

active video (SAV) region of the end of frame (EOF) line (the line that follows

the last line of active video) in the odd ﬁeld.

coarse exposure

Updated during the SAV region of the ﬁrst dark line in an odd ﬁeld

clock division

Updated at the odd to even ﬁeld transition

gain

Updated during the SAV region of the EOF line in the odd ﬁeld

pan parameter

Updated during the SAV region of the EOF line in the odd ﬁeld

tilt parameter

Updated during the SAV region of the ﬁrst visible line in an odd ﬁeld

video timing

Updated at the odd to even ﬁeld transition

Table 9 : Timed Parameter Update Points

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