参数资料
型号: BU97930MUV-E2
厂商: Rohm Semiconductor
文件页数: 23/31页
文件大小: 0K
描述: IC LCD DVR MULTI 27X4COM 40-VQFN
标准包装: 1
显示器类型: LCD
配置: 点阵
接口: 3 线 SPI 串行
电流 - 电源: 30µA
电源电压: 1.8 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 40-VFQFN,40-VFQFPN
供应商设备封装: 40-VQFN
包装: 标准包装
其它名称: BU97930MUV-E2DKR
BU97930MUV
MAX 108 segments (SEG27×COM4)
Datasheet
● Cautions on Power-On/ Power-Off condition
○ POR circuit
BU97930MUV has “P.O.R” (Power-On Reset) circuit and Software Reset function.
Please follow the recommended Power-On conditions in order to power up properly.
1, Please set power up conditions, follow the recommended tR, tF, tOFF, and Vbot specification below in order to
ensure P.O.R operation.
(*The detection voltage of POR varies because of environment, etc. To operate POR, please satisfy
Vbot lower than 0.5V condition.)
VDD
tR
Recommended condition of tR, tF, tOFF, Vbot
VDET
tOFF
Vbot
tR
less than
10ms
tOFF
Over
1ms
Vbot
less than
0.5V
VDET
TYP
1.2V
* VDET : POR detect level
Figure 17. Power ON/OFF Waveform
2, If it is difficult to meet the above conditions, execute the following sequence after Power-On.
(1) CSB=”L” → ”H” condition
(2) After CSB”H” → “L”, execute SWRST command.
In addition, in order to the SWRST command certainly, please wait 1ms after a VDD level reaches to 90% and
CSB=”L” → ”H”.
*Before SWRST command, input device will be in unstable state, since SWRST command does not operate
perfect substitution of a POR function.
VDD
CSB
Min 1ms
Min 50ns
SWRST
Command
Figure 18. SWRST Command Sequence
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8.Jan.2013 Rev.002
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