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HM1618 Datasheet(PDF) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

Part # HM1618
Description  LED drive control circuit with a keyboard scan interface
PDF  11 Pages
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Manufacturer  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
Direct Link  http://www.hmsemi.com/
Logo HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM1618 Datasheet(HTML) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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4、时序图与端口操作说明、指令系统介绍
4.1、时序图
4.2、显示寄存器地址和显示模式
该寄存器存储通过串行接口从外部器件传送到
1618 的数据，地址分配如下：
xxHL(低四位)
xxHU(高四位)
xxHL(低四位)
xxHU(高四位)
B0
B1
B2
B3
B4
B5
B6
B7
B0
B1
B2
B3
B4
B5
B6
B7
00HL
00HU
01HL
01HU
GRID1
02HL
02HU
03HL
03HU
GRID2
04HL
04HU
05HL
05HU
GRID3
06HL
06HU
07HL
07HU
GRID4
08HL
08HU
09HL
09HU
GRID5
0AHL
0AHU
0BHL
0BHU
GRID6
0CHL
0CHU
0DHL
0DHU
GRID7
4.3、键扫描和键扫数据寄存器
键扫矩阵为
5×1bit，如下所示：
键扫数据储存地址如下所示，先发读键命令后，开始读取按键数据
BYTE1—BYTE5 字节，读数
据从低位开始输出，其中
B6 和 B7 位为无效位，此时芯片输出为 0。芯片 K 和 KS 引脚对应的按键按
下时，相对应的字节内的
BIT 位为 1。
HM1618
Shenzhen H&M Semiconductor Co.Ltd
http:
//www.hmsemi.com
4



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