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参数资料
| 型号： | EVAL.BH1721FVC |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR BH1721FVC |
| 特色产品： | Ambient Light Sensor ICs |
| 标准包装： | 1 |
| 传感器类型： | 环境光 |
| 接口： | I²C |
| 灵敏度： | 560nm |
| 电源电压： | 2.4 V ~ 3.6 V |
| 嵌入式： | 否 |
| 已供物品： | 2 板，CD |
| 已用 IC / 零件： | BH1721 |
BH1721FVC
Technical Note
Write measurement command and Read measurement result are done by I C Bus interface. Please refer the formally
specification of I C Bus interface, and follow the formally timing chart.
● I 2 C Bus Access
1 ) I 2 C Bus Interface Timing chart
2
2
SDA
t HD ; STA
t f
t LOW
t r
t SU ; DAT
t f
tHD
t r
t BUF
SCL
S
t HD ; STA
t HD ; DAT
t
t HIGH
t SU ; STA
Sr
t SU;STO
P
S
2 ) Write Format
BH1721FVC is not able to accept plural command without stop condition. Please insert SP every 1 Opecode.
ST
Slave Address
"0100011"
R/W
0
Ack
Opecode
Ack
SP
3 ) Read Format
2
ST
Slave Address
"0100011"
R/W
1
Ack
15
High Byte [15:8]
2 14 2 13 2 12 2 11 2 10 2 9 2 8
Ack
2 7
2 6
Low Byte [7:0]
2 5 2 4 2 3 2 2
2 1
2 0
Ack
SP
+ 2 9 + 2 8 + 2 7 + 2 4 ) / 1.2 ≒ 28067 [ lx ]
(2
from Master to Slave
ex )
High Byte = "1000_0011"
Low Byte = "1001_0000"
15
* Please refer formality I 2 C bus specification of NXP semiconductors.
from Slave to Master
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
10/15
2011.11 - Rev.B
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