Programmers User Manual

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13.38 AE Target Value Assignment Camera Control Command Type 2
Function To assign target value of AE brightness.
Command 00A5h
Length 3 byte, including fixed value (3Bh). Parameter
Range 10h~FFh
Status None
Reference •To receive command at the moment of exposure mode auto.
•To brighten subject by increasing and darken subject by decreasing.
•An equivalent backlight correction of 1 aperture is obtained at 73h, 1.5
aperture at 90h, and 2 aperture at C0h.
•Default value is 48h.
•To return notification at the moment of setting command termination
notification ON, when operation terminates. Not to return notification of
AE Target Value Assignment command when Backlight Compensation
OFF and Backlight Compensation ON commands are executed during
operation. To return only notification of last assigned value command in case
of resetting another value during operation.
 Format of Control Code
d0 d1 d2 d3 d4 d5 d6 d7 d8
Header Device Num Command Parameter End mark
FFh 30h 3Xh 00h A5h 3Bh p1 p2 EFh
⇓
AE target value indicates in hexadecimal 2 figures and parameter value is its ASCII code.
Example: p1 p2
70 ⇒ 46h ⇒ 34h 36h
 Answer Format
d0 d1 d2 d3 d4 d5
Header Device Num Error Code End mark
FEh 30h 3Xh e0 e1 EFh
⇓
Error Flag indicates in 2 figures hexadecimal and returns ASCII code value.
Example: e0 e1
 In case of No Error : 00000000B ⇒ 00h ⇒ 30h 30h
 In case of Busy : 00010000B ⇒ 10h ⇒ 31h 30h
 In case of Parameter Error : 01010000B ⇒ 50h ⇒ 35h 30h
 In case of Mode Error : 10010000B ⇒ 90h ⇒ 39h 30h
 Condition of Error flag to be set
Busy •In process of camera initializing operation by Camera Reset
command, etc.
•In status of exposure mode manual.
•In status of AE Lock ON.
•In case of executing Preset Move command.
Parameter Error In case of assigned parameter out of range.
Mode Error •Not in status of Camera ON.
•Not in status of Host Control Mode.