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Technical Note

10/20

BH1730FVC

www.rohm.com

2012.02 - Rev.A

© 2012 ROHM Co., Ltd. All rights reserved.

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PART_ID ( 12h )

7 6 5 4 3 2 1 0

Part Number

Revision ID

default value 7Xh

Field Bit

Type

Description

Part number

7 : 4

R

0111

Revision ID

3 : 0

R

XXXX

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DATA0 (14h,15h)

7 6 5 4 3 2 1 0

ADC Type0 data

default value 00h

Register Address

Bit

Type

Description

DATA0 LSBs

14h

7 : 0

R

Lower byte

DATA0 MSBs

15h

7 : 0

R

Upper byte

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DATA1 (16h,17h)

7 6 5 4 3 2 1 0

ADC Type1 data

default value 00h

Register Address

Bit

Type

Description

DATA1 LSBs

16h

7 : 0

R

Lower byte

DATA1 MSBs

17h

7 : 0

R

Upper byte

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Содержание BH1730FVC

Страница 1: ...interface 8 Light source dependency is little by calculating with Type0 and Type1 ex Incandescent Lamp Fluorescent Lamp Halogen Lamp White LED Sun Light 9 Interrupt function is available 10 Adjustable...

Страница 2: ...1h DAh 1 Gain X2 resolution in Type0 rG2 0 42 lx count TIMING register 01h DAh 1 Gain X64 resolution in Type0 rG64 0 014 lx count TIMING register 01h DAh 1 Gain X128 resolution in Type0 rG128 0 007 lx...

Страница 3: ...Ah Fig 9 VCC ICC During measurement Fig 1 Spectral Response of Type0 visible light peak 0 0 2 0 4 0 6 0 8 1 1 2 2 2 5 3 3 5 4 VCC V Ratio Fig 11 Measurement Result VCC Dependency DVI 1 8V 0 0 2 0 4 0...

Страница 4: ...erter for obtainment digital 16bit data ADC Logic I 2 C Interface INT Interface Ambient light calculation logic and I 2 C Bus Interface and Interrupt function Interface OSC Internal oscillator typ 360...

Страница 5: ...mmand register is used 3 Case of write to data register after write to Command Register ST Slave Address 0101001 W 0 ACK Data to Command Register 1XXXXXXX ACK Data specified at register address field...

Страница 6: ...g DVI L Initial reset is not necessary because power on reset function is included in this product 2 Software reset command All registers are reset and BH1730FVC becomes power down by Software reset c...

Страница 7: ...threshold setting 07h RW GAIN Gain control 12h R ID Part number and Revision ID 14h R DATA0LOW ADC Type0 low byte data register 15h R DATA0HIGH ADC Type0 high byte data register 16h R DATA1LOW ADC Ty...

Страница 8: ...ges 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...

Страница 9: ...each measurement end 0010 Interrupt status is updated if two consecutive threshold judgments are the same When set 0011 or more interrupt status is updated if threshold judgments are the same over con...

Страница 10: ...ription Part number 7 4 R 0111 Revision ID 3 0 R XXXX DATA0 14h 15h 7 6 5 4 3 2 1 0 ADC Type0 data default value 00h Register Address Bit Type Description DATA0 LSBs 14h 7 0 R Lower byte DATA0 MSBs 15...

Страница 11: ...yp 100ms max 150ms and GAIN 00h X1 Gain at default Read measurement result ST Slave Address 0101001 W 0 ACK Write Command Register 1001_0100 ACK SP ST Slave Address 0101001 R 1 ACK Read DATA0 LSBs reg...

Страница 12: ...utputs The calculation formula depends on the characteristic of optical window The example of the calculation is shown as follows Ex No optical window or optical window that has flat transmittance fro...

Страница 13: ...old INT pin outputs L Interrupt threshold is defined at Interrupt threshold registers 03h 06h Interrupt function is able to control by Interrupt opecode Interrupt persistence is defined at Interrupt o...

Страница 14: ...CC Power supplies There is some cautions about power on and down sequence seeing in below Power on time t1 More than 2ms is need to active BH1730FVC after VCC supplies more than 2 0V from VCC is less...

Страница 15: ...026 Default Default 6 711 range of TIMING binary 1111_1111 1101_1010 0000_0001 range of TIMING decimal 255 218 1 Measurement time 2 7ms 102 6ms 688 5ms It is possible to detect 0 001 lx by using this...

Страница 16: ...use INT Pin please connect to GND or open 3 GND GND terminal 4 SDA I 2 C bus Interface SDA terminal 5 DVI SDA SCL reference voltage terminal and asynchronous reset terminal for internal registers Init...

Страница 17: ...rights reserved Package Outlines About an optical design on the device 0 8 mm 1 3 mm Sensitivity area 0 25mm x 0 3mm Please design the optical window so that light can cover at least this area Min 0...

Страница 18: ...ghts reserved The method of distinguishing 1pin There is some method of distinguishing 1pin Distinguishing by 1Pin marking Distinguishing by die pattern Distinguishing by taper part of 1 3pin side by...

Страница 19: ...r supply and then dismount it from the jig In addition for protection against static electricity establish a ground for the assembly process and pay thorough attention to the transportation and the st...

Страница 20: ...tity needs to be multiple of the minimum quantity Tape and Reel information Embossed carrier tape Tape Quantity Direction of feed The direction is the 1pin of product is at the upper right when you ho...

Страница 21: ...ical information The Products specified in this document are intended to be used with general use electronic equipment or devices such as audio visual equipment office automation equipment commu nicat...

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