参数资料
型号: BH6172GU-E2
厂商: Rohm Semiconductor
文件页数: 8/19页
文件大小: 0K
描述: IC PMIC DC/DC 1CH LDO 5CH
标准包装: 1
应用: 手持/移动设备
电源电压: 2.2 V ~ 5.5 V
工作温度: -35°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-VFBGA,24-CSPBGA
供应商设备封装: 24-VCSP
包装: 标准包装
其它名称: BH6172GU-E2DKR
BH6172GU
Technical Note
The I C compatible synchronous serial interface provides access to programmable functions and register on the device.
● I 2 C Bus Interface
2
This protocol uses a two-wire interface for bi-directional communications between the LSI’s connected to the bus.
The two interface lines are the Serial Data Line (DATA), and the Serial Clock Line (CLK). These lines should be connected to
the power supply DVDD by a pull-up resistor, and remain high even when the bus is idle.
1. Start and Stop Conditions
When CLK is high, pulling DATA low produces a start condition and pulling DATA high produces a stop condition.
Every instruction is started when a start condition occurs and terminated when a stop condition occurs. During read, a stop
condition causes the read to terminate and the chip enters the standby state. During write, a stop condition causes the
fetching of write data to terminate, after which writing starts automatically. Upon the completion of writing, the chip enters
the standby state. Two or more start conditions cannot be entered consecutively.
CLK
DATA
t SU.STA t HD.STA
Start condition
t SU.STO
Stop condition
Fig.3 I C Start, Stop condition
2
2. Data transmission
Data on the DATA input can be modified while CLK is low. When CLK is high, modifying the DATA input means a start or
stop condition.
CLK
DATA
t SU.DAT
Modify data
t HD.DAT
Modify data
Fig.4 I C Data Transmission Timing
2
All other acknowledge, write, and read timings all conform to the I 2 C standard.
3. Device addressing
The device address for this device is “1001111”.
Device address
Read/write instruction
code
1
0
0
1
1
1
1
R/W
Fig.5 I C device address
MSB
2
LSB
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
8/16
2011.03 - Rev.A
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