Auto exposure control – Unibrain 830 User Manual

Page 26

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Unibrain Fire-i 530/630/830 Operation Manual

Page 20

1: Control with value in Absolute value
CSR if this bit =1, value in Value filed is ignored

-

[2..4]

Reserved

One_Push

[5]

Write ‘1’: begin to work(Self cleared after operation)
Read : Value=’1’ in operation
Value =’0’ not in operation
If A_M_Mode=1, this bit is ignored

On/OFF

[6]

Write : ON or OFF this feature
Read : read a status
0: OFF, 1:ON
If this bit=0, other fields will be read only.

A_M_Mode

[7]

Write : Set the mode
Read : Read a current mode
0: Manual, 1:Auto

-

[8..19]

Reserved

Value

[20..31]

Minimum value for this feature control

3.2.

Auto Exposure Control

The automatic shutter/gain mode is based on a feedback loop which calculates the average pixel luminance. Then

the average is compared with the exposure reference value, adjusting shutter and gain accordingly. This feature is

similar to “Contrast Control”.

Inquiry Register

Address

Name

Field

Bit

Description

504h

AUTO_EXP
OSURE_INQ

Presence_Inq

[0]

Presence of this feature

Abs_Control_Inq

[1]

Capability of control with absolute value

-

[2]

Reserved

One_Push_Inq

[3]

One push auto mode(Controlled automatically by
camera only once)

ReadOut_Inq

[4]

Capability of reading the value of this feature

On/Off_Inq

[5]

Capability of switching this feature On and OFF

Auto_Inq

[6]

Auto mode (Controlled automatically by camera)

Manual_Inq

[7]

Manual mode(Controlled by user)

Min_Value

[8..19]

Minimum value for this feature control

Max_Value

[20..31]

Maximum value for this feature control

Status Control Register

Address

Name

Field

Bit

Description

804h

AUTO_EXP
OSURE

Presence_Inq

[0]

Presence of this feature
0:N/A 1:Available

Abs_Control

[1]

Absolute value control
0: Control with value in the Value field
1: Control with value in the Absolute value CSR
If this bit = 1, value in the Value field is ignored.

-

[2..4]

Reserved

One_Push

[5]

Write ‘1’ :begin to work (Self cleared after
operation)
Read: Value=’1’ in operation Value=’0’ not in
operation
If A_M_Mode =1, this bit is ignored

ON_OFF

[6]

Write: ON or OFF this feature,
Read: read a status

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This manual is related to the following products:

530, 630