CXD2463R
2. Backlighting Correction Function
The CXD2463R has a function to output the window pulse for backlight compensation.
The backlight compensation pulse is output from BLC (Pin 15) in the following range according to the high/low
combination of BLCW1 (Pin 17) and BLCW2 (Pin 18).
Window Type for Different Pin Combinations
Window type
BLCW1 (Pin 17) BLCW2 (Pin 18)
Full-screen photometry
L
L
Bottom emphasis photometry
H
L
Center emphasis photometry
L
H
Bottom + center emphasis photometry
H
H
Example of Basic Circuit Configuration
+5V
Iris comparator
13
IRIN/ED1
Iris
window switch
3.9k
10k
39k
10µ
10k 100k
10k
27 IRIS
10µ
BLC 15
CXD2463R
AGC
window switch
10k 1k
19 OP+
13 DETOUT
100k
CXA1310AQ
Full-screen photometry
Bottom emphasis photometry
Center emphasis photometry
Bottom + center emphasis photometry
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