参数资料
型号: BU97930MUV-E2
厂商: Rohm Semiconductor
文件页数: 7/31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
● Function description
○ Command and data transfer method
○ 3-SPI (3-wire serial interface)
This device is controlled by a 3-wire signal (CSB, SCL, and SD).
First, Interface counter is initialized with CSB=“H".
Setting CSB=”L”, enables SD and SCL inputs.
The protocol of 3-SPI transfer is as follows.
Each command starts with Command or Data judgment bit (D/C) as MSB data,
followed by data D6 to D0 (this is when CSB =”L”).
(Internal data is latched at the rising edge of SCL, serial data is converted to an 8-bit parallel data at the falling edge of
the 8th CLK.)
When CSB changes from “L” to “H”, and at this time serial commands are less than 8 bits, command and data transfers
are cancelled. To start sending command again, please set CSB=”L" and send command continuously.
After sending RAMWR or BLKWR or GPOSET command, this device is in the RAM data input mode. Under this mode,
device can not accept new commands.
In this case, execute a “H” to “L” transition at CSB, after this sequence, the device is released from RAM data input mode,
and can accept new command.
CSB
SCL
1st byte Command
2nd byte Command
3rd byte Command
SD
D/C
D6 D5 D4
D3 D2 D1 D0 D/C D6 D5 D4 D3 D2 D1 D0 D/C D6 D5 D4 D3 D2 D1 D0 D/C
D6
Figure 7. 3-SPI Data transfer Format
* 8-bit data, sending after RAMWR command, are display RAM data
* 8-bit data, sending after BLKWR command, are blink RAM data
* SCL and SD can be set to “H” or cleared to “L” during CSB=”H”.
www.rohm.com
? 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
7/28
TSZ02201-0A0A2D300060-1-2
8.Jan.2013 Rev.002
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