Technical Note
8/20
BH1730FVC
www.rohm.com
2012.02 - Rev.A
© 2012 ROHM Co., Ltd. All rights reserved.
○
CONTROL (00h)
7 6 5 4 3 2 1 0
RES
ADC_
INTR
ADC_
VALID
ONE_
TIME
DATA_
SEL
ADC_
EN
POWER
default value 00h
Field
Bit
Type Description
RES 7:
6
RW Write 00
ADC_INTR 5
R
0 : Interrupt is inactive.
1 : Interrupt is active.
ADC_VALID 4
R
0 : ADC data is not updated after last reading.
1 : ADC data is updated after last reading.
ONE_TIME 3
RW
0 : ADC measurement is continuous.
1 : ADC measurement is one time.
ADC changes to power down automatically.
DATA_SEL 2
RW
0 : ADC measurement Type0 and Type1.
1 : ADC measurement Type0 only.
ADC_EN 1
RW
0 : ADC measurement is not started.
1 : ADC measurement is started.
POWER 0
RW
0 : ADC power down.
1 : ADC power on.
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TIMING (01h)
7 6 5 4 3 2 1 0
ITIME
default value DAh
Field
Bit
Type Description
ITIME
7 : 0
RW
ADC Light Integration time control.
00000000 : Use manual integration mode.
11111111 : 1 cycle. 2.7ms.
11111110 : 2 cycle. 5.4ms.
11101101 : 19 cycle. 51.3ms.
11011010 : 38 cycle. 102.6ms.
10110110 : 74 cycle. 199.8ms.
01101100 : 148 cycle. 399.6ms.
00000001 : 255 cycle. 688.5ms.
Cycle is defined 256-ITIME<7:0>.
Integration time is typically cycle*2.7ms.
ADC needs additional 2ms for internal calculation.