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参数资料
| 型号： | BD7844AEFV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 8/17页 |
| 文件大小： | 0K |
| 描述： | IC LED DISPLAY DVR 5V 28-HTSSOP |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 频率： | 2MHz |
| 电源电压： | 4.5 V ~ 5.5 V |
| 输出电压： | 20V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-HTSSOP-B |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | BD7844AEFV-E2DKR |
BD7844AEFV
● Function explaining - continued
1-2. Slave address for all call
[1011000] is used as a slave address for all call. (Figure 4)
Slave address for all call
Datasheet
1
0
1
1
0
0
0
R/W
Unavailable in address terminal
Figure 4. Slave address for all call
All BD7844AEFV on the bus can control in the command at the same time by the slave address for all call. It enters the
state that can respond to all call when power supply (VDD) is turned on.
It can be selected not to respond when the ALL CALL bit of mode1 register is set to logic “0”.
Because the register data is returned from all BD7844AEFV on the bus when the last R/W bit of the slave address byte
is set to logic "1" (read) when the slave address for all calls is used, the master cannot read the register data of specific
BD7844AEFV.
Please use a usual slave address to read the register data of specific BD7844AEFV.
Take care: Slave address [1011000] for all calls must not use as a usual slave address because it becomes
enable when power supply (VDD) is turned on.
1-3. Slave address for software reset
[1011011] is used as a slave address for software reset. (Figure 5)
Slave address for software reset
R/W
1
0
1
1
0
1
1
0
Unavailable in address terminal
Figure 5. Slave address for software reset
All BD7844AEFV on the bus can be reset at the same time by the slave address for software reset.
It is necessary to use the slave address for software reset with R/W=0. BD7844AEFV doesn't recognize software reset
for R/W=1. Please refer to "3-2. Software reset" for details.
Take care: Because slave address [1011011] for software reset is a reserved address, It is not possible
to use it as a usual slave address.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
8/14
TSZ02201-0G3G0CZ00310-1-2
15.Oct.2012 Rev.001
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